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Journal articles on the topic 'Compton effect'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2024

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1

MAHDAVI, M., and B. KALEJI. "DEGENERACY EFFECT ON THE COMPTON SCATTERING POWER." Modern Physics Letters A 26, no. 17 (June 7, 2011): 1273–79. http://dx.doi.org/10.1142/s0217732311035742.

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The Compton scattering is one of the loss processes in fusion media. In this paper the Compton cross-section is calculated in three limits of temperature, non-relativistic, relativistic and ultra-relativistic temperatures. By considering the electron distribution function for all the temperature limits, we found the power of Compton scattering in degenerate media. These results show that the Compton scattering power increases with decreasing electron temperature. So, in degenerate conditions, the Compton loss processes decrease in fusion media.

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2

Agui, Akane, Hiroshi Sakurai, Naruki Tsuji, Haruka Ito, and Kiyofumi Nitta. "Effect on Compton Scattering Spectra by Hermite–Gaussian Light." Crystals 11, no. 6 (June 8, 2021): 650. http://dx.doi.org/10.3390/cryst11060650.

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In this study, we measured the Compton scattering spectra of Al, Ag and Au metals changing the harmonic order of X-rays from an undulator. The width of the Compton scattered X-ray spectrum changed depending on the harmonic order of X-rays. This indicates that Compton scattering spectra shape reflects a momentum perpendicular to the traveling direction in Hermite–Gaussian (HG) light.

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3

Daywitt, William C. "The Compton Effect in the Planck Vacuum Theory." European Journal of Applied Physics 4, no. 6 (November 25, 2022): 20–21. http://dx.doi.org/10.24018/ejphysics.2022.4.6.215.

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This note reviews the Compton-effect photon scattering and relates it to the spinor nature of the electron and positron cores. The modified wavelength equation is seen to be proportional to the electron Compton radius from the Planck vacuum (PV) theory.

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4

Carezani, Ricardo L. "The Compton Effect and Autodynamics." Physics Essays 6, no. 3 (September 1993): 384–88. http://dx.doi.org/10.4006/1.3029071.

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5

Strnad, J. "The Compton effect-Schrodinger's treatment." European Journal of Physics 7, no. 4 (October 1, 1986): 217–21. http://dx.doi.org/10.1088/0143-0807/7/4/001.

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6

Redzic, Dragan V. "Comment on the Compton effect." European Journal of Physics 21, no. 1 (January 1, 2000): L9. http://dx.doi.org/10.1088/0143-0807/21/1/404.

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7

Luo, Qinghuan. "The Effect of Radiation Drag on Relativistic Bulk Flows in Active Galactic Nuclei." Publications of the Astronomical Society of Australia 19, no. 1 (2002): 122–24. http://dx.doi.org/10.1071/as01112.

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AbstractThe effect of radiation drag on relativistic bulk flows is re-examined. Highly relativistic bulk flows in the nuclear region are subject to Compton drag, i.e. radiation deceleration as a result of inverse Compton scattering of ambient soft photon fields from emission from the accretion disk, broad line region, or dusty torus. Possible observational consequences of X-/γ-ray emission produced from Compton drag are specifically discussed.

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8

Jo, A., Y. Kim, and W. Lee. "Compton sequence estimation based on the deep learning method." AIP Advances 12, no. 11 (November 1, 2022): 115021. http://dx.doi.org/10.1063/5.0123302.

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Determining the sequence of Compton scattering and photoelectric absorption events for a Compton camera system through timing information is difficult due to the finite timing resolution of radiation detectors. The conventional method compares the energies of two sequential events and determines the order of these events. The deep learning method can estimate the sequence of Compton scattering followed by the photoelectric effect better than the conventional method because it determines the sequence based on both energy and positional information of the radiation interaction. The initial information of the deep learning models is the position and energy information, and the input data are then processed in the nodes of the hidden layers. In this study, the performance of deep learning models for Compton sequence estimation and the effect of position information on these methods were investigated. The accuracies of the deep learning method and the conventional comparison method were compared. The weights connecting each node were analyzed to evaluate the effects of position and energy information to determine the Compton sequence.

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9

Adagba J Augustine, G. "The Effect of Compton-Getting Correction on Galactic Cosmic Rays Anisotropy." International Journal of Science and Research (IJSR) 12, no. 5 (May 5, 2023): 1517–19. http://dx.doi.org/10.21275/sr23512120204.

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10

Lieu, Richard, and W. Ian Axford. "Synchrotron Radiation: an Inverse Compton Effect." Astrophysical Journal 416 (October 1993): 700. http://dx.doi.org/10.1086/173270.

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11

CHISTYAKOV, M. V., and D. A. RUMYANTSEV. "COMPTON EFFECT IN STRONGLY MAGNETIZED PLASMA." International Journal of Modern Physics A 24, no. 20n21 (August 20, 2009): 3995–4008. http://dx.doi.org/10.1142/s0217751x09043018.

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The process of Compton scattering γe± → γe± in strongly magnetized hot and cold electron–positron plasma is considered. The analytical expressions for the partial cross-sections in rarefied plasma and the simple expressions for the photon absorption rates in degenerate plasma are obtained. The numerical estimations of the absorption rates for various scattering channels are presented taking into account of the photon dispersion and wave function renormalization in strong magnetic field and plasma. The comparison of the scattering absorption rate with photon splitting probability shows the existence of plasma parameters range where these values are comparable with each other.

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12

Elbaz, C. "Kinematical properties of the Compton effect." Journal of Physics A: Mathematical and General 20, no. 3 (February 21, 1987): 647–50. http://dx.doi.org/10.1088/0305-4470/20/3/027.

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13

Elbaz, C. "Optical properties of the Compton effect." Journal of Physics A: Mathematical and General 20, no. 5 (April 1, 1987): L279—L282. http://dx.doi.org/10.1088/0305-4470/20/5/004.

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14

Shivalingaswamy, T., and B. A. Kagali. "Compton effect with non-relativistic kinematics." Physics Education 46, no. 5 (August 23, 2011): 538–39. http://dx.doi.org/10.1088/0031-9120/46/5/003.

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15

Saglam, Ziya, Gokhan Sahin, and Bahadir Boyacioglu. "Compton effect in terms of spintronic." Results in Physics 6 (2016): 726–27. http://dx.doi.org/10.1016/j.rinp.2016.10.007.

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16

v. Borzeszkowski, H. H. "On Gravitons: Hohlraumstrahlung and Compton Effect." Annalen der Physik 498, no. 3-5 (1986): 170–72. http://dx.doi.org/10.1002/andp.19864980307.

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17

Pardy, Miroslav. "Compton scattering in dielectric medium." Intellectual Archive 12, no. 4 (December 9, 2023): 1–13. http://dx.doi.org/10.32370/ia_2023_12_1.

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We determine the Compton effect from the Volkov solution of the Dirac equation for a process in medium with the index of refraction n. Volkov solution involves the mass shift, or, the mass renormalization of an electron. We determine the modified Compton formula for the considered physical situation. The index of refraction causes that the wave lengths of the scattered photons are shorter for some angles than the wave lengths of the original photons. This is anomalous Compton effect.

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18

Zhu, Jiang. "Theory and Application of Compton Scattering Experiment." Highlights in Science, Engineering and Technology 64 (August 21, 2023): 185–90. http://dx.doi.org/10.54097/hset.v64i.11278.

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Compton scattering has been a key concept in atomic and molecular physics, material science, condensed matter physics, and other fields ever since it was originally discovered by Arthur H. Compton in 1923. Additionally, the Compton camera, one of the applications of Compton scattering can gather sufficient data and information about photons with energies above 500 keV, which is important for scientific research into astronomy, medical imaging, and the visualization of radioactive materials. The free electron approximation, the impulse approximation, and the scattering matrix are some of the methods used to arrive at the Compton formula and the underlying principles of the Compton effect. In this article, a full derivation of Compton formula will be included, along with a deduction of the free electron approximation, which shows the relationship between Compton scattering and Thomson scattering, a low-energy limit of the former when the photon energy is much less than the mass energy of the particle. Also, the article will discuss several thoughts of Compton scattering, including the examination of the connection between wavelengths and relative intensities, the defiance of conservation laws, and virtual photon absorption.

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19

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 and the Doppler effect arising from mass and thermal motions of scattering electrons. It is noticed that the Comptonized spectrum depends on three parameters: the optical depth of the medium, the temperature of the thermal electrons and the viewing angle. We also showed that the Compton effect produces red shift and asymmetry in the line. These two effects increase as the optical depth increases. It is also noticed that the emergent specific intensities become completely asymmetric for higher optical depths.

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20

Fang, Chang-Hao, Haitao Jia, and Shin-Ted Lin. "Atomic Compton scattering effect on direct dark matter detection." Journal of Physics: Conference Series 2156, no. 1 (December 1, 2021): 012023. http://dx.doi.org/10.1088/1742-6596/2156/1/012023.

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Abstract Atomic Compton scattering effect significantly contributes to low-energy electronic recoils below its k-shell energy for the direct dark matter detection. Searches on ADM models, dark photon models, leptophilic dark matter models as well as the conventional WIMPs for background understandings are vitally required to clarify the effect. We employed the relativistic impulse approximation (RIA) together with the ab initio Multi-Configuration Dirac-Fock (MCDF) theory to obtain the atomic Compton scattering for Germanium (Ge) Silicon (Si) and Xenon (Xe) atoms. Comparisons on low momentum transfer regions with our calculations for Ge and Si are achieved. In addition, millicharged dark matter particles estimated by RIA in the atomic ionization for Ge and Xe have been evaluated. A factor-of-two discrepancy on the incoherent-scattering factor (a.k.a. scattering function) near 100 eV/c momentum transfer with the Ge system between our calculation and the latest version of Geant4 (10.07.02) simulation data is observed. Plans on the experimental verification and the perspectives of the atomic Compton scattering effect for the direct detections will be discussed.

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21

Kobayashi, Kohjiro, and Hiroshi Sakurai. "Calculation of Compton Profiles Using the DV-Xα Method for 14 Electron Diatomic Molecules." Key Engineering Materials 497 (December 2011): 19–25. http://dx.doi.org/10.4028/www.scientific.net/kem.497.19.

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Isotropic and directional Compton profiles are calculated for 14 electron diatomic molecules, N2, CO, and BF, using the DV-Xα method. In order to investigate the effect of chemical bonding for Compton profiles, parallel and perpendicular directional Compton profiles to the molecules are calculated and compared with the results from Hartree-Fock and configuration interaction methods. The DV-Xα method could describe the more detailed character of covalent bonding than that of ionic bonding.

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22

Bhowal, Sayantika, Daniel O'Neill, Michael Fechner, Nicola A. Spaldin, Urs Staub, Jon Duffy, and Stephen P. Collins. "Anti-symmetric Compton scattering in LiNiPO4: Towards a direct probe of the magneto-electric multipole moment." Open Research Europe 1 (May 5, 2022): 132. http://dx.doi.org/10.12688/openreseurope.13863.2.

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Background: Magnetoelectric multipoles, which break both space-inversion and time-reversal symmetries, play an important role in the magnetoelectric response of a material. Motivated by uncovering the underlying fundamental physics of the magnetoelectric multipoles and the possible technological applications of magnetoelectric materials, understanding as well as detecting such magnetoelectric multipoles has become an active area of research in condensed matter physics. Here we employ the well-established Compton scattering effect as a possible probe for the magnetoelectric toroidal moments in LiNiPO4. Methods: We employ combined theoretical and experimental techniques to compute as well as detect the antisymmetric Compton profile in LiNiPO4. For the theoretical investigation we use density functional theory to compute the anti-symmetric part of the Compton profile for the magnetic and structural ground state of LiNiPO4. For the experimental verification, we measure the Compton signals for a single magnetoelectric domain sample of LiNiPO4, and then again for the same sample with its magnetoelectric domain reversed. We then take the difference between these two measured signals to extract the antisymmetric Compton profile in LiNiPO4. Results: Our theoretical calculations indicate an antisymmetric Compton profile in the direction of the ty toroidal moment in momentum space, with the computed antisymmetric profile around four orders of magnitude smaller than the total profile. The difference signal that we measure is consistent with the computed profile, but of the same order of magnitude as the statistical errors and systematic uncertainties of the experiment. Conclusions: While the weak difference signal in the measurements prevents an unambiguous determination of the antisymmetric Compton profile in LiNiPO4, our results motivate further theoretical work to understand the factors that influence the size of the antisymmetric Compton profile, and to identify materials exhibiting larger effects.

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23

Bhowal, Sayantika, Daniel O'Neill, Michael Fechner, Nicola A. Spaldin, Urs Staub, Jon Duffy, and Stephen P. Collins. "Anti-symmetric Compton scattering in LiNiPO4: Towards a direct probe of the magneto-electric multipole moment." Open Research Europe 1 (November 1, 2021): 132. http://dx.doi.org/10.12688/openreseurope.13863.1.

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Background: Magnetoelectric multipoles, which break both space-inversion and time-reversal symmetries, play an important role in the magnetoelectric response of a material. Motivated by uncovering the underlying fundamental physics of the magnetoelectric multipoles and the possible technological applications of magnetoelectric materials, understanding as well as detecting such magnetoelectric multipoles has become an active area of research in condensed matter physics. Here we employ the well-established Compton scattering effect as a possible probe for the magnetoelectric toroidal moments in LiNiPO4. Methods: We employ combined theoretical and experimental techniques to compute as well as detect the antisymmetric Compton profile in LiNiPO4. For the theoretical investigation we use density functional theory to compute the anti-symmetric part of the Compton profile for the magnetic and structural ground state of LiNiPO4. For the experimental verification, we measure the Compton signals for a single magnetoelectric domain sample of LiNiPO4, and then again for the same sample with its magnetoelectric domain reversed. We then take the difference between these two measured signals to extract the antisymmetric Compton profile in LiNiPO4. Results: Our theoretical calculations indicate an antisymmetric Compton profile in the direction of the ty toroidal moment in momentum space, with the computed antisymmetric profile around four orders of magnitude smaller than the total profile. The difference signal that we measure is consistent with the computed profile, but of the same order of magnitude as the statistical errors and systematic uncertainties of the experiment. Conclusions: While the weak difference signal in the measurements prevents an unambiguous determination of the antisymmetric Compton profile in LiNiPO4, our results motivate further theoretical work to understand the factors that influence the size of the antisymmetric Compton profile, and to identify materials exhibiting larger effects.

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24

Stuewer, R. H. "The Compton effect: Transition to quantum mechanics." Annalen der Physik 512, no. 11-12 (November 2000): 975–89. http://dx.doi.org/10.1002/andp.200051211-1216.

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25

Kidd, Richard, James Ardini, and Anatol Anton. "Compton effect as a double Doppler shift." American Journal of Physics 53, no. 7 (July 1985): 641–44. http://dx.doi.org/10.1119/1.14274.

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26

Valdez Kinderman, Jesusa. "Investigating the Compton effect with a spreadsheet." Physics Teacher 30, no. 7 (October 1992): 426–28. http://dx.doi.org/10.1119/1.2343598.

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27

Wilkins, Daniel. "General Compton effect via a Lorentz transformation." American Journal of Physics 56, no. 11 (November 1988): 1044–45. http://dx.doi.org/10.1119/1.15340.

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28

Pollyceno, Lucas S., and Alexandre D. Ribeiro. "Wave-particle duality using the Compton effect." Physics Letters A 384, no. 31 (November 2020): 126808. http://dx.doi.org/10.1016/j.physleta.2020.126808.

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29

Gerl, J. "Gamma-ray imaging exploiting the Compton effect." Nuclear Physics A 752 (April 2005): 688–95. http://dx.doi.org/10.1016/j.nuclphysa.2005.02.068.

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30

Peraiah, A., and M. Srinivasa Rao. "Compton broadening effect on spectral line formation." Astrophysics and Space Science 343, no. 1 (September 18, 2012): 195–211. http://dx.doi.org/10.1007/s10509-012-1233-0.

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31

Stuewer, R. H. "The Compton effect: Transition to quantum mechanics." Annalen der Physik 9, no. 11-12 (November 2000): 975–89. http://dx.doi.org/10.1002/1521-3889(200011)9:11/12<975::aid-andp975>3.0.co;2-8.

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32

KAISER, N. "ISOSPIN BREAKING IN PION COMPTON SCATTERING." International Journal of Modern Physics E 21, no. 10 (October 2012): 1230009. http://dx.doi.org/10.1142/s0218301312300093.

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Using chiral perturbation theory we calculate for pion Compton scattering the isospin-breaking effects induced by the difference between the charged and neutral pion mass. At one-loop order this correction is directly proportional to [Formula: see text] and free of any contributions from short-distance electromagnetic counterterms. The differential cross-section for charged pion Compton scattering π-γ→π-γ gets affected (in backward directions) at the level of a few permille only. At the same time the isospin-breaking correction leads to a small shift of the pion polarizability difference by δ(απ-βπ)≃1.3⋅10-5 fm 3. In the case of the low-energy γγ→π0π0 reaction isospin breaking manifests itself through a cusp effect at the π+π- threshold. We give an improved estimate for this cusp effect using the empirical ππ-scattering length difference [Formula: see text].

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33

Yang, W. X., H. G. Wang, Y. Liu, J. H. Yang, H. B. Xiao, X. H. Ye, Z. Y. Pei, L. X. Zhang, and J. H. Fan. "Beaming Effect in Fermi Blazars." Astrophysical Journal 925, no. 2 (January 31, 2022): 120. http://dx.doi.org/10.3847/1538-4357/ac3a09.

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Abstract Blazars show extreme observational properties that are due to the beaming effect with the jet being close to the line of sight. It was found that the observed luminosity is anticorrelated with the synchrotron peak frequency but the debeamed luminosity and the frequency is positively correlated. In this work, we revisit this correlation for a large sample of 255 blazars from the fourth Fermi catalog with available Doppler factors. Our analysis comes to the following conclusions. (1) The observed radio, X-ray, γ-ray, and synchrotron peak luminosity are all anticorrelated with the peak frequency, but the debeamed luminosity is positively correlated with the debeamed peak frequency. The anticorrelation is due to a selection effect or a beaming effect. (2) The Compton dominance parameter is correlated with both the bolometric luminosity and Doppler factor, implying that the more highly Compton-dominated sources are more luminous. (3) The bolometric luminosity can be represented by the γ-ray luminosity for Fermi blazars.

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34

Dubrovich, V. K., and T. A. Zalyalyutdinov. "Effekty konechnogo vremeni v odinarnom i dvoynom komptonovskom rasseyanii." Журнал экспериментальной и теоретической физики 163, no. 6 (June 15, 2023): 771–78. http://dx.doi.org/10.31857/s0044451023060019.

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The process of Compton scattering by a free electron with subsequent reemission of one or two photons is considered in the assumption of finite interaction time. The corresponding cross sections are obtained in the framework of relativistic quantum electrodynamics using a modified form of fermion propagator with complex transmitted momentum. It is shown that finite time effects can be observable at sufficiently low energies of scattered photons. The proposed method also regularizes arising infrared divergence in the cross section of the double Compton effect. Possible experimental verification of considered theoretical approach is discussed.

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35

DONG, YU-BING, T. MORII, and T. YAMANISHI. "SEMI-INCLUSIVE HADRON PAIR PRODUCTION AND POLARIZED GLUONS IN THE PROTON." International Journal of Modern Physics A 18, no. 08 (March 30, 2003): 1273–80. http://dx.doi.org/10.1142/s0217751x03014605.

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To extract the polarized gluon distribution Δg, we study the large–pTlight hadron pair productions in polarized semi-inclusive reaction, which are dominantly produced via 2 mechanisms: photon–gluon fusion(PGF) and QCD Compton. The PGF gives us a direct information on Δg in the nucleon, whereas QCD Compton is background to the signal process for extracting Δg. By using symmetry relation among fragmentation functions and taking an appropriate combination of light hadron pair production processes, we can remove an effect of QCD Compton from those cross sections. Here we propose a new formula for extracting Δg from those processes.

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36

Jadhav, Niranjan, Gaurav Mota, Ambresh Mishra, Dhiraj Gupta, and Anamika Kadam. "Relativistic theory to Compton effect for spectroscopic detector." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1032 (June 2022): 166656. http://dx.doi.org/10.1016/j.nima.2022.166656.

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37

Brown, Laurie M. "The Compton effect as one path to QED." Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 33, no. 2 (June 2002): 211–49. http://dx.doi.org/10.1016/s1355-2198(02)00005-9.

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38

Apell, S. P., R. Cabrera-Trujillo, J. Oddershede, S. B. Trickey, and J. R. Sabin. "Effect of shape on molecular directional Compton profiles." Journal of Molecular Structure: THEOCHEM 527, no. 1-3 (August 2000): 157–63. http://dx.doi.org/10.1016/s0166-1280(00)00488-7.

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39

Kotkin, G. L., S. I. Polityko, and V. G. Serbo. "Polarization of final electrons in the Compton effect." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 405, no. 1 (March 1998): 30–38. http://dx.doi.org/10.1016/s0168-9002(97)01112-1.

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40

Nozari, Kourosh, and S. Davood Sadatian. "Loop quantum gravity modification of the Compton effect." General Relativity and Gravitation 40, no. 1 (September 14, 2007): 23–33. http://dx.doi.org/10.1007/s10714-007-0512-5.

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41

Feller, Steve, Sandeep Giri, Nicholas Zakrasek, and Mario Affatigato. "A Non-Relativistic Look at the Compton Effect." Physics Teacher 52, no. 1 (January 2014): 12–15. http://dx.doi.org/10.1119/1.4849145.

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42

Boca, Madalina, and Viorica Florescu. "Non-linear Compton effect with a laser pulse." Journal of Physics: Conference Series 194, no. 3 (November 1, 2009): 032003. http://dx.doi.org/10.1088/1742-6596/194/3/032003.

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43

Perdikatsis, V. "Quantitative determination of mineral matter in lignite by X-RAY spectrometry, using the Compton effect." Bulletin of the Geological Society of Greece 47, no. 4 (December 21, 2016): 1645. http://dx.doi.org/10.12681/bgsg.11008.

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For the evaluation of lignite quality, apart from the calorific value, it is necessary to determine the mineral phases, which are deposited simultaneously with the organic matter during the formation of peat or formed epigenetically during the coalification stages. The mineral matter content is usually expressed as ash, after the combustion of lignite, and its determination is a quite time consuming process. In this paper an attempt is made for a fast and easy quantitative determination of mineral matter in lignite samples with unknown concentrations, with the use of an X-ray spectrometer and in particular the Compton effect of the X-ray tube. The intensity of the Compton peak is a function of the mass absorption coefficient of the lignite sample, which in turn depends on the type and amount of the mineral matter contained. Using this property of the Compton Effect, the percentage of mineral matter of lignite was determined. The method was verified by analyzing lignites with known concentrations of inorganic mater. The results of this study showed, that the mineral matter content can be determined, by the proposed method, fast and accurately without lignite combustion.

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44

Collins, S. P., D. Laundy, T. Connolley, G. van der Laan, F. Fabrizi, O. Janssen, M. J. Cooper, H. Ebert, and S. Mankovsky. "On the possibility of using X-ray Compton scattering to study magnetoelectrical properties of crystals." Acta Crystallographica Section A Foundations and Advances 72, no. 2 (February 16, 2016): 197–205. http://dx.doi.org/10.1107/s2053273316000863.

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This paper discusses the possibility of using Compton scattering – an inelastic X-ray scattering process that yields a projection of the electron momentum density – to probe magnetoelectrical properties. It is shown that an antisymmetric component of the momentum density is a unique fingerprint of such time- and parity-odd physics. It is argued that polar ferromagnets are ideal candidates to demonstrate this phenomenon and the first experimental results are shown, on a single-domain crystal of GaFeO3. The measured antisymmetric Compton profile is very small (≃ 10−5of the symmetric part) and of the same order of magnitude as the statistical errors. Relativistic first-principles simulations of the antisymmetric Compton profile are presented and it is shown that, while the effect is indeed predicted by theory, and scales with the size of the valence spin–orbit interaction, its magnitude is significantly overestimated. The paper outlines some important constraints on the properties of the antisymmetric Compton profile arising from the underlying crystallographic symmetry of the sample.

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45

Esin, Ann A. "Heating and Cooling of Hot Accretion Flows by Non Local Radiation." International Astronomical Union Colloquium 163 (1997): 700. http://dx.doi.org/10.1017/s0252921100043505.

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AbstractHot optically thin accretion flow solutions are often used to model X-ray binaries and active galactic nuclei. Recently two new classes of advection-dominated models have been proposed: a two-temperature solution (Narayan & Yi 1995, ApJ, 452, 710; Abramowicz et al. 1995, ApJ, 438, L37), and a one-temperature solution (Esin et al. 1996, ApJ, 465, 312). Though detailed numerical spectra of advection-dominated flows include global radiative transfer effects (e.g. Narayan 1996, ApJ, 462, 136), analytical calculations of the physical properties of these accretion solutions generally ignore the effects of non-local radiative transfer (e.g. Narayan & Yi 1995; Esin et al. 1996). However, the optical depth for electron scattering in such flows is generally much lower than unity, and therefore, radiation emitted at one radius can potentially heat or cool the gas at other radii through Compton scattering. In this paper we investigate the importance of this effect. We discuss three situations: 1.Radiation from the inner regions of an advection-dominated flow Compton cooling gas at intermediate radii and Compton heating gas at large radii.2.Soft radiation from an outer thin accretion disk Compton cooling a hot one- or two-temperature flow on the inside.3.Soft radiation from an inner thin accretion disk Compton cooling hot gas in a surrounding one-temperature flow.We describe how previous results are modified by these non-local interactions. We find that Compton heating or cooling of the gas by the radiation emitted in the inner regions of a hot flow is not important. Likewise, Compton cooling by the soft photons from an outer thin disk is negligible when the transition from a cold to a hot flow occurs at a radius greater than some minimum Rtr,min ~ 102.8(Ṁ / ṀEdd)3.5α−7Rschw. However, if the hot flow terminates at R < Rtr,mim, non-local cooling of the hot gas near the transition radius is so strong that the flow is cooled to a thin disk configuration. As a result, the transition radius decreases and the hot gas at the new boundary experiences even stronger external cooling. The resulting runaway process continues until the entire hot flow assumes the thin disk configuration. In the case of a thin disk surrounded by a hot one-temperature flow, we find that Compton cooling by soft radiation dominates over local cooling in the hot gas for Ṁ ≳ 10−3αṀEdd. As a result, the maximum accretion rate for which an advection-dominated one-temperature solution exists, decreases by a factor of ~ 10, compared to the value computed under an assumption of local energy balance.

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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 initial electron.

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Daywitt, William C. "Electron Recoil in the Compton Effect as Viewed in the Planck Vacuum Theory." European Journal of Applied Physics 5, no. 2 (April 12, 2023): 28–30. http://dx.doi.org/10.24018/ejphysics.2023.5.2.252.

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Bahmanabadi, Mahmud, Mehdi Khakian Ghomi, Farzaneh Sheidaei, and Jalal Samimi. "Galactic Anisotropy of Cosmic Ray Intensity Observed by an Air Shower Experiment." Publications of the Astronomical Society of Australia 23, no. 3 (2006): 129–34. http://dx.doi.org/10.1071/as06015.

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AbstractWe have monitored multi-TeV cosmic rays by a small air shower array in Tehran (35°43′ N, 51°20′ E, 1200 m = 890 g cm−2). More than 1.1 × 106 extensive air shower events were recorded. These observations enabled us to analyse sidereal variation of the galactic cosmic ray intensity. The observed sidereal daily variation is compared to the expected variation which includes the Compton–Getting effect due to the motion of the earth in the Galaxy. In addition to the Compton–Getting effect, an anisotropy has been observed which is due to a unidirectional anisotropy of cosmic ray flow along the Galactic arms.

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Hardy, S. J., and D. B. Melrose. "Induced Compton Scattering in a Pulsar Wind." Publications of the Astronomical Society of Australia 12, no. 1 (April 1995): 84–88. http://dx.doi.org/10.1017/s1323358000020099.

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Voroshilo, A. I., S. P. Roshchupkin, and V. N. Nedoreshta. "Parametric interference Compton effect in two pulsed laser waves." Journal of Physics B: Atomic, Molecular and Optical Physics 48, no. 5 (February 4, 2015): 055401. http://dx.doi.org/10.1088/0953-4075/48/5/055401.

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