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Journal articles on the topic 'Compton electrons and electron-positrons'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Dapor, Maurizio. "Comparison of Electron Compton Scattering with Positron Compton Scattering in Polyethylene." Materials 18, no. 7 (2025): 1609. https://doi.org/10.3390/ma18071609.

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Understanding the interaction of charged particles with polymers is crucial for applications in materials science, radiation physics, and electron spectroscopy. This study investigates the differences in the elastic scattering spectra of electrons and positrons in polyethylene, focusing on the underlying mechanisms that influence the spectral features. The analysis isolates key factors such as recoil energy, Doppler broadening, and the interplay between elastic and inelastic mean free paths. Using Monte Carlo simulations, we analyze the effects of the elastic and inelastic mean free paths on t

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SAKAUE, KAZUYUKI, TAKU SAITO, ISSEI YAMAZAKI, et al. "POLARIZED POSITRON GENERATION BASED ON LASER COMPTON SCHEME AND ITS POLARIZATION MEASUREMENTS." International Journal of Modern Physics B 21, no. 03n04 (2007): 519–26. http://dx.doi.org/10.1142/s021797920704232x.

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We have proposed a new scheme for polarized positron production, consisting of two quantum processes i.e. inverse Compton scatterings of circularly polarized laser light on high-quality electron beams and successive electron-positron pair creations. Using a circularly polarized laser beam of 532 nm scattered off a high-quality electron beam with the energy of 1.28 GeV, we have demonstrated for the first time productions of highly polarized positrons with an intensity of 2×104 e +/ bunch and an average energy of 36 MeV. Hence an average polarization of positrons was determined as 73±15( stat )±

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3

Jonas, P., P. Schattschneider, and P. Pongratz. "Removal of Bragg-Compton Channel Coupling in Electron Compton Scattering." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 2 (1990): 24–25. http://dx.doi.org/10.1017/s0424820100133710.

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Electron Compton scattering is inelastic scattering of fast electrons at large angles off core or valence electrons. The energy of the scattered electron is increasingly lowered with scattering angle; the energy distribution can be shown to be an image of the electron momentum density distribution in the ground state.The most dominant problem in ECOSS (Electron Compton Scattering from Solids), is the Bragg-Compton channel coupling. Bragg scattered electrons in the specimen act as new sources for Compton scattering. Since these Compton events correspond to various scattering angles a number of

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Cirelli, Marco, Bradley J. Kavanagh, Nicolao Fornengo, and Elena Pinetti. "Constraining sub-GeV dark matter with the Integral data." Journal of Physics: Conference Series 2156, no. 1 (2021): 012033. http://dx.doi.org/10.1088/1742-6596/2156/1/012033.

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Abstract The goal of this work is to constrain sub-GeV dark matter particles (1 MeV ≤ mDM ≤ 5 GeV) by looking at photons in the keV energy range and by including the inverse Compton scattering contribution to the total flux. In particular, the electrons and positrons produced by dark matter particles can scatter the low-energy photons in the Milky Way up to the X-ray energies. These X rays are probed by the Integral data, which we utilised to constrain the dark matter annihilation cross-section. The relevant annihilation channels are electron, muon and pion. As a result, we derived competitive

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LOTZE, K. H. "SIMULTANEOUS CREATION OF ELECTRON–POSITRON PAIRS AND PHOTONS IN ROBERTSON–WALKER UNIVERSES WITH STATICALLY BOUNDED EXPANSION." International Journal of Modern Physics A 07, no. 12 (1992): 2695–712. http://dx.doi.org/10.1142/s0217751x92001216.

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We present, based upon quantum electrodynamics in Robertson–Walker flat universes, a thorough analysis of the creation of mutually interacting electron–positron pairs and photons from vacuum. Therefore we discuss at least qualitatively all processes contributing to the number densities of created particles up to the second order in the coupling constant. For two particular expansion laws with Minkowskian in respectively in and out regions, we obtain exact solutions to the Dirac equation and investigate in detail the process of simultaneous creation of electron–positron pairs and photons and th

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6

Haug, Espen Gaarder. "Relativistic Compton Wavelength." European Journal of Applied Physics 4, no. 4 (2022): 24–27. http://dx.doi.org/10.24018/ejphysics.2022.4.4.190.

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In 1923, Arthur Holly Compton introduced what today is known as the Compton wavelength. Even if the Compton scattering derivation by Compton is relativistic in the sense that it takes into account the momentum of photons traveling at the speed of light, the original Compton derivation indirectly assumes that the electron is stationary at the moment it is scattered by electrons, but not after it has been hit by photons. Here, we extend this to derive Compton scattering for the case when the electron is initially moving at a velocity v.

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Borysova, M. "Studies of high-field QED with the LUXE experiment at the European XFEL." Journal of Instrumentation 16, no. 12 (2021): C12030. http://dx.doi.org/10.1088/1748-0221/16/12/c12030.

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Abstract The LUXE experiment aims at studying high-field QED in electron-laser and photon-laser interactions, with the 16.5 GeV electron beam of the European XFEL and a laser beam with power of up to 350 TW. The experiment will measure the spectra of electrons and photons in non-linear Compton scattering where production rates in excess of 109 are expected per 1 Hz bunch crossing. At the same time positrons from pair creation in either the two-step trident process or the Breit-Wheeler process will be measured, where the expected rates range from 10−3 to 104 per bunch crossing, depending on the

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Schaap, B. H., T. D. C. de Vos, P. W. Smorenburg, and O. J. Luiten. "Photon yield of superradiant inverse Compton scattering from microbunched electrons." New Journal of Physics 24, no. 3 (2022): 033040. http://dx.doi.org/10.1088/1367-2630/ac59eb.

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Abstract Compact x-ray sources offering high-brightness radiation for advanced imaging applications are highly desired. We investigate, analytically and numerically, the photon yield of superradiant inverse Compton scattering from microbunched electrons in the linear Thomson regime, using a classical electrodynamics approach. We show that for low electron beam energy, which is generic to inverse Compton sources, the single electron radiation distribution does not match well to collective amplification pattern induced by a density modulated electron beam. Consequently, for head-on scattering fr

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9

Wen, Lu, Ke-Yao Wu, Huan Yu, and Jun Fang. "Investigating the energy distribution of the high-energy particles in the Crab nebula." Research in Astronomy and Astrophysics 21, no. 11 (2021): 286. http://dx.doi.org/10.1088/1674-4527/21/11/286.

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Abstract The Crab nebula is a prominent pulsar wind nebula detected in multiband observations ranging from radio to very high-energy γ-rays. Recently, γ-rays with energies above 1 PeV have been detected by the Large High Altitude Air Shower Observatory, and the energy of the most energetic particles in the nebula can be constrained. In this paper, we investigate the broadest spectral energy distribution of the Crab nebula and the energy distribution of the electrons emitting the multiwavelength nonthermal emission based on a one-zone time-dependent model. The nebula is powered by the pulsar, a

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MacKinnon, A. L., and P. C. V. Mallik. "Inverse Compton X-rays from relativistic flare electrons and positrons." Astronomy and Astrophysics 510 (February 2010): A29. http://dx.doi.org/10.1051/0004-6361/200913190.

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Krajewska, K., and J. Z. Kamiński. "Spin effects in nonlinear Compton scattering in ultrashort linearly-polarized laser pulses." Laser and Particle Beams 31, no. 3 (2013): 503–13. http://dx.doi.org/10.1017/s0263034613000165.

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AbstractThe nonlinear Compton scattering by a linearly polarized laser pulse of finite duration is analyzed, with a focus on the spin effects of target electrons. We show that, although the Compton scattering accompanied by the electron no-spin flip is dominant, for some energy regions of Compton photons their emission is dominated by the process leading to the electron spin flip. This feature is observed for different pulse durations, and can be treated as a signature of quantum behavior. Similar conclusions are reached when analyzing the scattered electron energy spectra. This time, the sens

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Sizykh, Georgii K., Sergei P. Roshchupkin, and Victor V. Dubov. "Resonant Effect of High-Energy Electron–Positron Pairs Production in Collision of Ultrarelativistic Electrons with an X-ray Electromagnetic Wave." Universe 7, no. 7 (2021): 210. http://dx.doi.org/10.3390/universe7070210.

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The process of resonant high-energy electron–positron pairs production by electrons in an X-ray pulsar electromagnetic field is studied theoretically. Under the resonance conditions, the second-order process under consideration effectively reduces into two sequential first-order processes: X-ray-stimulated Compton effect and X-ray–stimulated Breit–Wheeler process. The kinematics of the process is studied in detail: the dependencies of the energy of the scattered electron on its outgoing angle and the energies of the particles of the pair on the outgoing angle of the scattered electron and the

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13

Ehlotzky, F. "Laser-induced Compton scattering from a bound electron." Canadian Journal of Physics 70, no. 1 (1992): 72–77. http://dx.doi.org/10.1139/p92-007.

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We investigate nonrelativistically Compton scattering by an electron bound in hydrogen in a powerful laser field. The corresponding nonlinear rates and cross sections are evaluated in a Keldysh-type of approximation and compared with the rates and cross sections of multiphoton ionization and harmonic generation. We find that multiphoton ionization overshadows Compton scattering by many orders of magnitude, however, Compton scattering may well compete with harmonic generation above the ionization threshold, since, in particular, both processes have the same angular distribution and only odd har

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14

Srinivasa, Rao. "Study of Compton broadening due to electron-photon scattering." Serbian Astronomical Journal, no. 180 (2010): 11–18. http://dx.doi.org/10.2298/saj1080011s.

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We have investigated the effects of Compton broadening due to electron-photon scattering in hot stellar atmospheres. A purely electron-photon scattering media is assumed to have plane parallel geometry with an input radia?tion field localized on one side of the slab. The method is based on the discrete space theory of radiative transfer for the intensity of emitted radiation. The solution is developed to study the importance of scattering of radiation by free electrons in high temperature stellar atmospheres which produces a brodening and shift in spectral lines because of the Compton effect a

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15

Qiu Yuan-Yuan, Yang Yu-Jun, Guo Ying-chun, and Wang Bing-Bing. "The single-photon Compton scattering process of bound electrons in intense laser fields is studied by using frequency-domain theory." Acta Physica Sinica 74, no. 15 (2025): 0. https://doi.org/10.7498/aps.74.20250483.

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Compton scattering is defined as an inelastic scattering process in which the interaction between strong laser fields and electrons in matter leads to photon emission. In recent years, with the rapid development of X-ray free-electron lasers, the intensity of X-ray lasers has steadily increased, and the photon energy in Compton scattering process has risen correspondingly. Previous studies have focused on single-photon Compton scattering of free electrons. However, the mechanisms of non-relativistic X-ray photon scattering by bound electrons remain to be elucidated. To address this, we develop

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Bornikov, K. A., I. P. Volobuev, and Yu V. Popov. "Notes on inverse Compton scattering." Seriya 3: Fizika, Astronomiya, no. 4_2023 (September 20, 2023): 2340201–1. http://dx.doi.org/10.55959/msu0579-9392.78.2340201.

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The paper considers some kinematic conditions for the inverse Compton scattering of photons by relativistic electrons and the polarizations of colliding particles, which affect the value of the differential cross section of the process. A significant influence of the electron and photon helicity on the value of the cross section was found. In the ultrarelativistic case, a surprising effect of an almost twofold increase in the cross section of scattering in the direction of the initial electron momentum was also discovered, when the initial photon momentum is perpendicular to that of the initia

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Ahuja, B. L., Vinit Sharma, and Y. Sakurai. "Magnetic Compton Scattering Study of Shape Memory Alloys." Advanced Materials Research 52 (June 2008): 145–54. http://dx.doi.org/10.4028/www.scientific.net/amr.52.145.

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The Compton profile, projection of electron momentum density distribution along the scattering vector, is very sensitive to the behavior of valence electrons in a variety of materials. In this paper theoretical aspects related to measurement of spin momentum densities of magnetic materials using Compton scattering is reviewed. To highlight the potential of the magnetic Compton scattering, the spin momentum densities in Ni-Mn-Ga Heusler alloys at various temperatures and magnetic fields are presented. The magnetic Compton profiles are mainly analyzed in terms of the contribution from the 3d ele

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Mohanmurthy, Prajwal, Amrendra Narayan, and Dipangkar Dutta. "A test of local Lorentz invariance with Compton scattering asymmetry." Modern Physics Letters A 31, no. 38 (2016): 1650220. http://dx.doi.org/10.1142/s0217732316502205.

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We report on a measurement of the constancy and anisotropy of the speed of light relative to the electrons in photon–electron scattering. We used the Compton scattering asymmetry measured by the new Compton polarimeter in Hall C at Jefferson Lab (JLab) to test for deviations from unity of the vacuum refractive index (n). For photon energies in the range of 9–46 MeV, we obtain a new limit of 1 − n < 1.4 × 10[Formula: see text]. In addition, the absence of sidereal variation over the six-month period of the measurement constrains any anisotropies in the speed of light. These constitute the fi

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Ahuja, B. L., M. Sharma, and S. Mathur. "Electronic Structure of Liquid Mercury Using Compton Scattering Technique." Zeitschrift für Naturforschung A 59, no. 9 (2004): 543–49. http://dx.doi.org/10.1515/zna-2004-0903.

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The isotropic Compton profile of mercury has been measured, using 661.65 keV gamma-rays from a 20 Ci 137Cs source. To extract the true experimental Compton line shape, besides the usual systematic corrections we have incorporated for the first time the background correction due to bremsstrahlung radiation generated by photo and Compton electrons. Theoretical computations have been carried out, using the renormalised-free-atom (RFA) for the electron configuration 4f145d106s2 and free electron models. It is found that the present experimental data with bremsstrahlung background correction are in

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Luo, Qinghuan, and R. J. Protheroe. "Resonant Inverse Compton Scattering above Polar Caps: Gap Acceleration Efficiency for Young Pulsars." Publications of the Astronomical Society of Australia 15, no. 2 (1998): 222–27. http://dx.doi.org/10.1071/as98222.

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AbstractIt is shown that for moderately hot polar caps (with effective temperature of ∼106 K), the efficiency of polar gap acceleration is lower compared to the case in which the polar caps are relatively cool and inverse Compton scattering plays no role in controlling the gap. For young pulsars with superstrong magnetic fields (≥109 T) and hot polar caps (with temperature of ≥5 × 106 K), because of the energy loss of electrons or positrons due to resonant inverse Compton scattering in the vicinity of polar caps, pair cascades occur at distances further away from the polar cap, and in this cas

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van Soelen, Brian, та Pieter J. Meintjes. "γ-ray production via IC scattering of the infrared excess from the Be-type star in the binary system PSR B1259-63/SS2883". Proceedings of the International Astronomical Union 6, S272 (2010): 636–37. http://dx.doi.org/10.1017/s1743921311011677.

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AbstractUn-pulsed γ-ray emission has been detected close to periastron in the pulsar/Be-star binary system PSR B1259-63/SS 2883, believed to originate from the shock front that forms between the stellar and pulsar winds. A likely source of γ-ray production is the inverse Compton up-scattering of target photons from the Be star by relativistic electrons/positrons in the pulsar wind. In this study the influence of the infrared radiation, emanating from the circumstellar disc, on isotropic inverse Compton γ-ray production is investigated. It is shown that the scattering of infrared disc photons c

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Xiao, Yifan, Keyao Wu та Jun Fang. "Likely Detection of GeV γ-Ray Emission from Pulsar Wind Nebula G32.64+0.53 with Fermi-LAT". Astrophysical Journal 972, № 1 (2024): 84. http://dx.doi.org/10.3847/1538-4357/ad6563.

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Abstract In this study, we report the likely GeV γ-ray emissions originating from the pulsar PSR J1849-0001's pulsar wind nebula (PWN) G32.64+0.53. Our analysis covers approximately 14.7 yr of data from the Fermi Large Area Telescope Pass 8. The position of the source and its spectrum matches those in X-ray and TeV energy bands, so we propose that the GeV γ-ray source is indicative of PWN G32.64+0.53. We interpret the broadband spectral energy distribution (SED) using a time-dependent one-zone model, which assumes that the multiband nonthermal emission of the target source can be generated by

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Tian, Shiting, Liancheng Zhou, Yunlu Gong, Keyao Wu, Jun Fang, and Huan Yu. "Investigating the Multiband Nonthermal Radiative Properties of HESS J1420−607." Publications of the Astronomical Society of the Pacific 135, no. 1049 (2023): 074503. http://dx.doi.org/10.1088/1538-3873/ace3f8.

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Abstract HESS J1420−607 is a γ-ray emitting source associated with the pulsar wind nebula (PWN) powered by the energetic pulsar PSR J1420−6048. Based on 14 yr of data obtained with the Fermi Large Area Telescope, we re-analyzed its GeV γ-ray radiative properties, resulting in detailed spectra obtained within the band 10–200 GeV. Moreover, we use a one-zone time-dependent model for the multiband nonthermal emission from pulsar wind nebulae to investigate the radiative properties of the nebula associated with HESS J1420−607. Assuming that the electrons/positrons are injected into the PWN with a

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Ahuja, Babu Lal, Harsh Malhotra, and Sonal Mathur. "Electron Momentum Density In Europium Using A 137Cs Compton Spectrometer." Zeitschrift für Naturforschung A 60, no. 7 (2005): 512–16. http://dx.doi.org/10.1515/zna-2005-0708.

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The isotropic Compton profile of europium, the most reactive lanthanide, has been measured at a resolution of 0.40 a.u. using 661.65 keV gamma-rays. In the absence of a band structure-based Compton profile, the experimental data are compared with renormalised-free-atom (RFA) and free electron models. It is seen that the RFA model with e−-e− correlation agrees better with the experiment than the free electron models. The first derivatives of the Compton profiles show the hybridization effects of s-, p-, d-, f-electrons. From our RFA data we have also computed the cohesive energy of europium. PA

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Luo, W., H. B. Zhuo, Y. Y. Ma, X. H. Yang, N. Zhao та M. Y. Yu. "Ultrashort-pulse MeV positron beam generation from intense Compton-scattering γ-ray source driven by laser wakefield acceleration". Laser and Particle Beams 31, № 1 (2012): 89–94. http://dx.doi.org/10.1017/s0263034612000948.

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AbstractIntense Compton-scattering γ-ray radiation driven by laser wakefield acceleration (LWFA) and generation of ultrashort positron beams are investigated by Monte Carlo simulation. Using an LWFA driven GeV electron bunch and a 45 femtosecond, 90 mJ/pulse, and 10 Hz Ti:Sapphire laser for driving the Compton scattering, fs γ-ray pulses were generated. The latter have a flux of ≥108/s, peak brightness of ≥1020 photons/(s mm2 mrad2 0.1% bandwidth), and photon energy of 5.9 to 23.2 MeV. The γ-ray pulses then impinge on a thin high-Z target. More than 107 positrons/s in the form of sub-100 fs pu

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Qiao, Chen-Kai, Jian-Wei Wei, and Lin Chen. "An Overview of the Compton Scattering Calculation." Crystals 11, no. 5 (2021): 525. http://dx.doi.org/10.3390/cryst11050525.

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The Compton scattering process plays significant roles in atomic and molecular physics, condensed matter physics, nuclear physics and material science. It could provide useful information on the electromagnetic interaction between light and matter. Several aspects of many-body physics, such us electronic structures, electron momentum distributions, many-body interactions of bound electrons, etc., can be revealed by Compton scattering experiments. In this work, we give a review of ab initio calculation of Compton scattering process. Several approaches, including the free electron approximation

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Gharibyan, Vahagn. "Experimental hint for gravitational CP violation." Modern Physics Letters A 35, no. 11 (2020): 2050079. http://dx.doi.org/10.1142/s0217732320500790.

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An equality of particle and antiparticle gravitational interactions holds in general relativity and is supported by indirect observations. Gravity dependence on rotation or spin direction is experimentally constrained for non-relativistic matter. Here, a method based on high-energy Compton scattering is developed to measure the gravitational interaction of accelerated charged particles. Within that formalism, the Compton spectra measured at HERA rule out the speculated anti-gravity possibility for antimatter at a confidence level close to 100%. The same data, however, imply a gravitational CP

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Kettle, B., A. Aquila, S. Boutet, et al. "Anomalous two-photon Compton scattering." New Journal of Physics 23, no. 11 (2021): 115008. http://dx.doi.org/10.1088/1367-2630/ac3553.

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Abstract X-ray free-electron lasers can generate radiation pulses with extreme peak intensities at short wavelengths. This enables the investigation of laser–matter interactions in a regime of high fields, yet at a non-relativistic ponderomotive potential, where ordinary rules of light–matter interaction may no longer apply and nonlinear processes are starting to become observable. Despite small cross-sections, first nonlinear effects in the hard x-ray regime have recently been observed in solid targets, including x-ray-optical sum-frequency generation (XSFG), x-ray second harmonic generation

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Belotsky, Konstantin, and Maxim Solovyov. "On the Possible Asymmetry in Gamma Rays from Andromeda Due to Inverse Compton Scattering of Star Light on Electrons from Dark Matter Annihilation." Galaxies 11, no. 6 (2023): 109. http://dx.doi.org/10.3390/galaxies11060109.

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Dark matter is a popular candidate to a new source of primary-charged particles, especially positrons in cosmic rays, which are proposed to account for observable anomalies. While this hypothesis of decaying or annihilating DM is mostly applied for our Galaxy, it could possibly lead to some interesting phenomena when applied for the other ones. In this work, we look into the hypothetical asymmetry in gamma radiation from the upper and lower hemisphere of the dark matter halo of the Andromeda galaxy due to inverse Compton scattering of starlight on the DM-produced electrons and positrons. While

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Krafft, Geoffrey A., and Gerd Priebe. "Compton Sources of Electromagnetic Radiation." Reviews of Accelerator Science and Technology 03, no. 01 (2010): 147–63. http://dx.doi.org/10.1142/s1793626810000440.

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When a relativistic electron beam interacts with a high-field laser beam, intense and highly collimated electromagnetic radiation will be generated through Compton scattering. Through relativistic upshifting and the relativistic Doppler effect, highly energetic polarized photons are radiated along the electron beam motion when the electrons interact with the laser light. For example, X-ray radiation can be obtained when optical lasers are scattered from electrons of tens-of-MeV beam energy. Because of the desirable properties of the radiation produced, many groups around the world have been de

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Vodinas, N. P., D. W. Higinbotham, C. W. De Jager, N. H. Papadakis, and I. Passchier. "A Compton Backscattering Polarimeter for Electron Beams below 1 GeV." HNPS Proceedings 7 (December 5, 2019): 130. http://dx.doi.org/10.12681/hnps.2409.

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A recently installed polarized electron source will allow internal target experiments to be performed with polarized electrons at the NIKHEF Internal Target Hall, lb measure the longitudinal component of the polarization vector of the stored electron beam, a Polarimeter based on spin-dependent Compton scattering has been developed and successfully commissioned

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Breuhaus, Mischa, Joachim Hahn, Carlo Romoli, et al. "Ultra-high energy inverse Compton emission from Galactic electron accelerators." EPJ Web of Conferences 280 (2023): 02001. http://dx.doi.org/10.1051/epjconf/202328002001.

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It is generally held that >100 TeV emission from astrophysical objects unambiguously demonstrates the presence of PeV protons or nuclei, due to the unavoidable Klein–Nishina suppression of inverse Compton emission from electrons. However, in the presence of inverse Compton dominated cooling, hard high-energy electron spectra are possible. We show that the environmental requirements for such spectra can naturally be met in spiral arms, and in particular in regions of enhanced star formation activity, the natural locations for the most promising electron accelerators: powerful young pulsars.

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Roshchupkin, Sergei P., and Mikhail V. Shakhov. "Quantum Entanglement of the Final Particles in the Resonant Trident Pair Production Process in a Strong Electromagnetic Wave." Photonics 12, no. 4 (2025): 307. https://doi.org/10.3390/photonics12040307.

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The resonant trident pair production process in the collision of ultrarelativistic electrons with a strong electromagnetic wave was theoretically studied. Under resonant conditions, the intermediate virtual gamma-quantum became real. As a result, the original resonant trident pair production process effectively split into two first-order processes by the fine structure constant: the electromagnetic field-stimulated Compton effect and the electromagnetic field-stimulated Breit–Wheeler process. The kinematics of the resonant trident pair production process were studied in detail. It was shown th

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Aguiar, Julio C., and Héctor O. Di Rocco. "Compton profile and charge density reconstruction by the maximum entropy method." Physica Scripta 97, no. 4 (2022): 045818. http://dx.doi.org/10.1088/1402-4896/ac60f4.

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Abstract The aim of this work is to propose a theoretical procedure to determine the electron momentum density and Compton profile of valence electrons in solids. The procedure consists in a hybrid methodology that combines the maximum entropy method and Dirac-Hartree–Fock formalism, which allows including exchange and correlation effects on valence electrons for distances near the atomic nucleus and that are approximated using the Breit-Wigner distribution function. This technique can be applied for a wide range of crystalline solids. The results and comparisons reported here are for: lithium

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Altschul, Brett. "Improved Bounds on Lorentz Symmetry Violation from High-Energy Astrophysical Sources." Symmetry 13, no. 4 (2021): 688. http://dx.doi.org/10.3390/sym13040688.

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Observations of the synchrotron and inverse Compton emissions from ultrarelativistic electrons in astrophysical sources can reveal a great deal about the energy–momentum relations of those electrons. They can thus be used to place bounds on the possibility of Lorentz violation in the electron sector. Recent γ-ray telescope data allow the Lorentz-violating electron cνμ parameters to be constrained extremely well, so that all bounds are at the level of 7×10−16 or better.

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Muchnoi, N. Yu. "Electron beam polarimeter and energy spectrometer." Journal of Instrumentation 17, no. 10 (2022): P10014. http://dx.doi.org/10.1088/1748-0221/17/10/p10014.

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Abstract The backscattering of laser radiation by a relativistic electron beam is a widely used method for measuring the spin polarization of electrons. We consider again the properties of the scattering process paying special attention to recoil electrons. Based on this consideration we propose the concept of the Compton polarimeter in which, in addition to all the polarization components, it becomes possible to accurately measure the energy and other parameters of the electron beam. To demonstrate the capabilities of the method we conduct a Monte Carlo simulations of the polarimeter develope

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Butsaracom, Kritaporn, Brandon Khan Cantlay, and Maneenate Wechakama. "Fitting electron spectrum from AMS-02 by pulsar electrons." Journal of Physics: Conference Series 2145, no. 1 (2021): 012003. http://dx.doi.org/10.1088/1742-6596/2145/1/012003.

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Abstract In this work, we aim to explain the latest data of cosmic-ray electrons from AMS-02 by an electron background model and pulsar electrons. We consider an electron background model which includes primary and secondary electrons. We assume that pulsars are major sources of the electron excess. Since electrons easily lose their energy through the interstellar radiation field and the magnetic field via inverse Compton scattering and synchrotron radiation, respectively, they propagate in a short length. We adopt nearby pulsar data in the distance of 1 kpc from the Australia Telescope Nation

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Zhu, Bo-Tao, Fang-Wu Lu, and Li Zhang. "A Study of Particle Transport in Young Pulsar Wind Nebulae." Astrophysical Journal 943, no. 2 (2023): 89. http://dx.doi.org/10.3847/1538-4357/acaaa0.

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Abstract The broadband emission of numerous pulsar wind nebula (PWNe) in our Galaxy can be well described by synchrotron radiation and inverse Compton scattering from relativistic particles, specifically electrons and positrons. However, the particle transport mechanism is still under debate. We use here a time-dependent model to investigate the particle transport process of the young PWN, while the particle cooling processes are also analyzed. Following applications of the model to six young PWNe, our results show that (1) the particle cooling process is dominated by adiabatic loss in the low

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Sakurai, Yoshiharu. "Electron Momentum Density: Recent Progress and Perspective for Combined Studies." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1549. http://dx.doi.org/10.1107/s2053273314084502.

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Quantum mechanical descriptions are becoming a focus of attention in understanding the behavior of wide classes of materials. This paper discusses some of our recent works related to charge or magnetic Compton scattering studies. Selected topics include: (1) Quantum modelling of doped holes in high-Tc cuprates [1], which provides insight into the dome-shaped doping dependence of the superconducting transition temperature. (2) Analyses of Compton scattering X-ray spectra in spin-crossover cobaltates, which allows us to delineate the t2g-eg physics and quantum chemistry from the temperature evol

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Oomi, G., F. Honda, T. Kagayama, et al. "High-pressure system for Compton scattering experiments." Journal of Synchrotron Radiation 5, no. 3 (1998): 932–34. http://dx.doi.org/10.1107/s0909049598000429.

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High-pressure apparatus for Compton scattering experiments has been developed to study the momentum distribution of conduction electrons in metals and alloys at high pressure. This apparatus was applied to observe the Compton profile of metallic Li under pressure. It was found that the Compton profile at high pressure could be obtained within several hours by using this apparatus and synchrotron radiation. The result on the pressure dependence of the Fermi momentum of Li obtained here is in good agreement with that predicted from the free-electron model.

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Zhu, Bo-Tao, Li Zhang, and Jun Fang. "Multiband nonthermal radiative properties of pulsar wind nebulae." Astronomy & Astrophysics 609 (January 2018): A110. http://dx.doi.org/10.1051/0004-6361/201629108.

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Aims. The nonthermal radiative properties of 18 pulsar wind nebulae (PWNe) are studied in the 1D leptonic model. Methods. The dynamical and radiative evolution of a PWN in a nonradiative supernova remnant are self-consistently investigated in this model. The leptons (electrons/positrons) are injected with a broken power-law form, and nonthermal emission from a PWN is mainly produced by time-dependent relativistic leptons through synchrotron radiation and inverse Compton process. Results. Observed spectral energy distributions (SEDs) of all 18 PWNe are reproduced well, where the indexes of low-

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Lovesey, Stephen W. "Theories of Compton Scattering by Magnetic Materials." Zeitschrift für Naturforschung A 48, no. 1-2 (1993): 261–65. http://dx.doi.org/10.1515/zna-1993-1-249.

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Abstract Theoretical work on the cross-section for Compton scattering by magnetic materials is surveyed. Exact results for scattering by a free polarized electron are contrasted with corresponding results obtained perturbatively for a model of bound electrons with a finite width to the momentum distribution.

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Kosianov, Petr M. "Determining the ratio of the number of recoil electrons to the number of photoelectrons using a new method." Nexo Revista Científica 34, no. 04 (2021): 1413–19. http://dx.doi.org/10.5377/nexo.v34i04.12688.

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The problem in question is relevant due to discrepancy between the results of theoretical and known experimental studies of various interactions of ionizing emission photons with substances, in particular, photo effect and Compton scattering of these photons. The study aimed at carrying out specific measurements using a new method of simultaneously determining the ratio of the number of recoil electrons to the number of photoelectrons. Analysis of the results showed that there are significant discrepancies between theoretical calculations and experimental data. New values of simultaneously mea

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Khera, Shabha, Narayan Lal Heda, Sonal Mathur, and Babu Lal Ahuja. "Electronic Structure of Gadolinium and Dysprosium Using Compton Scattering Technique." Zeitschrift für Naturforschung A 61, no. 5-6 (2006): 299–305. http://dx.doi.org/10.1515/zna-2006-5-615.

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In this paper we present the first ever measured Compton profiles of polycrystalline gadolinium and dysprosium using 661.65 keV gamma-rays. The Compton data are compared with renormalized-freeatom (RFA) and free-electron model profiles. In both cases the RFA model (with e− - e− correlation) gives a better agreement with the experiment. The hybridization effects of s-, p-, d-, and f-electrons are discussed, using the first derivatives of the Compton profiles. We also report the cohesive energy of both samples, computed from the RFA calculations. - PACS numbers: 13.60.F, 71.15.Nc, 78.70. -g, 78.

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SCHOPPER, RÜDIGER, HARTMUT RUHL, THOMAS A. KUNZL, and HARALD LESCH. "Kinetic simulation of the coherent radio emission from pulsars." Laser and Particle Beams 21, no. 1 (2003): 109–13. http://dx.doi.org/10.1017/s0263034603211204.

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On hand of 3D PIC simulations we show that in a strongly magnetized plasma a relativistic electron beam can be forced to emit highly coherent radio emission by self-induced nonlinear density fluctuations. Such slowly moving nonlinear structures oscillate with the local plasma frequency at which the relativistic electrons are scattered. Beam electrons dissipate a significant amount of their kinetic energy by inverse Compton radiation at a frequency of about γ2ωpe. Since the beam is sliced into pancake structures which experience the same electric field the inverse Compton scattering is coherent

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Sim, Minju, Hongjun An, and Zorawar Wadiasingh. "Modeling X-Ray and Gamma-Ray Emission from Redback Pulsar Binaries." Astrophysical Journal 964, no. 2 (2024): 109. http://dx.doi.org/10.3847/1538-4357/ad25fb.

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Abstract We investigated the multiband emission from the pulsar binaries XSS J12270−4859, PSR J2039−5617, and PSR J2339−0533, which exhibit orbital modulation in the X-ray and gamma-ray bands. We constructed the sources’ broadband spectral energy distributions and multiband orbital light curves by supplementing our X-ray measurements with published gamma-ray results, and we modeled the data using intrabinary shock (IBS) scenarios. While the X-ray data were well explained by synchrotron emission from electrons/positrons in the IBS, the gamma-ray data were difficult to explain with the IBS compo

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VURM, INDREK, and JURI POUTANEN. "ELECTRON THERMALIZATION AND PHOTON EMISSION FROM MAGNETIZED COMPACT SOURCES." International Journal of Modern Physics D 17, no. 09 (2008): 1629–34. http://dx.doi.org/10.1142/s0218271808013236.

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We present detailed calculations of the electron thermalization by synchrotron self-absorption accounting for cooling by Compton scattering. For the first time, we solve the coupled kinetic equations for electrons and photons without any approximations on the relevant cross-sections and compute self-consistently the resulting electron and photon distributions. The results presented in this contribution may be applied to the magnetized coronae around galactic black hole accretion disks.

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Bashirov, M. "FORWARD AND BACKSCATTERING OF COMPTON IN ANISOTROPIC PLASMA OF THE SOLAR WIND." Slovak international scientific journal, no. 64 (June 6, 2022): 3–5. https://doi.org/10.5281/zenodo.6615996.

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In terms of the properties of the solar wind plasma, it is also important to take into account Compton backscattering on electrons and Compton scattering on protons. With a sufficiently high energy of electrons, it becomes possible to significantly increase the energy of photons involved in this process. Therefore, in cases where cosmic sources contain electrons or other particles whose energies exceed the energies of photons, then a significant distortion of the primary radiation spectrum should occur. The radiation emitted from the sun, photons, electrons, protons and other particles, intera

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Buuck, M., A. Mishra, E. Charles, et al. "Low-energy Electron-track Imaging for a Liquid Argon Time-projection-chamber Telescope Concept Using Probabilistic Deep Learning." Astrophysical Journal 942, no. 2 (2023): 77. http://dx.doi.org/10.3847/1538-4357/aca329.

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Abstract The GammaTPC is an MeV-scale single-phase liquid argon time-projection-chamber gamma-ray telescope concept with a novel dual-scale pixel-based charge-readout system. It promises to enable a significant improvement in sensitivity to MeV-scale gamma rays over previous telescopes. The novel pixel-based charge readout allows for imaging of the tracks of electrons scattered by Compton interactions of incident gamma rays. The two primary contributors to the accuracy of a Compton telescope in reconstructing an incident gamma-ray’s original direction are its energy and position resolution. In

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Tachibana, Yuichi, Yuuki Onitsuka, Masakazu Yamazaki, and Masahiko Takahashi. "Development of an Electron-Atom Compton Scattering Apparatus Using a Picosecond Pulsed Electron Gun." Atoms 9, no. 1 (2021): 19. http://dx.doi.org/10.3390/atoms9010019.

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An apparatus has been developed for electron-atom Compton scattering experiments that can employ a pulsed laser and a picosecond pulsed electron beam in a pump-and-probe scheme. The design and technical details of the apparatus are described. Furthermore, experimental results on the Xe atom in its ground state are presented to illustrate the performance of the pulsed electron gun and the detection and spectrometric capabilities for scattered electrons. The scope of future application is also discussed, involving real-time measurement of intramolecular force acting on each constituent atom with

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