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Journal articles on the topic 'X-ray wave'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Bedzyk, M. J., P. Fenter, Z. Zhang, L. Cheng, J. S. Okasinski, and N. C. Sturchio. "X‐ray Standing Wave Imaging." Synchrotron Radiation News 17, no. 3 (2004): 5–10. http://dx.doi.org/10.1080/08940880408603088.

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2

Gogolev, Aleksey, Yury Cherepennikov, Roman Rezaev, and Andrey Ogrebo. "Monochromatic X-Ray Source for Dual-Wave X-Ray Absorptiometry." Advanced Materials Research 1084 (January 2015): 252–55. http://dx.doi.org/10.4028/www.scientific.net/amr.1084.252.

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This work considers the existing approaches and devices for the composition analysis of multiphase medium are considered. A new technique for analyzing three-phase mediums based on the wave dispersive analysis of radiation is proposed. The fluxes of a multiphase fluid, composite materials, etc. can act as the mediums. Preliminary estimates show that the sensitivity is about 0.25% of the oil content in water and 1% of the content of gas.

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3

Kato, Shoji. "Low-Frequency, One-Armed Corrugation Waves in Relativistic Accretion Disks." Publications of the Astronomical Society of Japan 41, no. 4 (1989): 745–61. https://doi.org/10.1093/pasj/41.4.745.

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Abstract The presence of very low-frequency wave modes in geometrically thin relativistic disks is demonstrated. Such wave modes are one-armed corrugation waves which flutter in the vertical direction. In the case of compact X-ray sources, a typical frequency of these waves is comparable with that of low-frequency noise known in these objects. The group velocity of these waves is proportional to the square root of the frequency. This explains the observational fact (Miyamoto et al. 1988; AAA 46.117.187) that the time delay τ of hard X-ray variations relative to that of soft X-ray depends on th

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4

Galaudage, Shanika, Karl Wette, Duncan K. Galloway, and Chris Messenger. "Deep searches for X-ray pulsations from Scorpius X-1 and Cygnus X-2 in support of continuous gravitational wave searches." Monthly Notices of the Royal Astronomical Society 509, no. 2 (2021): 1745–54. http://dx.doi.org/10.1093/mnras/stab3095.

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ABSTRACT Neutron stars in low mass X-ray binaries (LMXBs) are hypothesised to emit continuous gravitational waves that may be detectable by ground-based observatories. The torque balance model predicts that a higher accretion rate produces larger-amplitude gravitational waves, hence LMXBs with high X-ray flux are promising targets for gravitational wave searches. The detection of X-ray pulsations would identify the spin frequency of these neutron stars, and thereby improve the sensitivity of continuous gravitational-wave searches by reducing the volume of the search parameter space. We perform

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5

Bernardi, Dominic, Yajie Yuan, and Alexander Y. Chen. "Alfvén Wave Conversion to Low Frequency Fast Magnetosonic Waves in Magnetar Magnetospheres." Astrophysical Journal 980, no. 2 (2025): 222. https://doi.org/10.3847/1538-4357/adabe5.

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Abstract Rapid shear motion of magnetar crust can launch Alfvén waves into the magnetosphere. The dissipation of the Alfvén waves has been theorized to power the X-ray bursts characteristic of magnetars. However, the process by which Alfvén waves convert their energy to X-rays is unclear. Recent work has suggested that energetic fast magnetosonic (fast) waves can be produced as a byproduct of Alfvén waves propagating on curved magnetic field lines; their subsequent dissipation may power X-ray bursts. In this work, we investigate the production of fast waves by performing axisymmetric force-fre

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6

Snigirev, A. A., and A. Yu Suvorov. "X-ray interference on finite polyhedral crystals." Acta Crystallographica Section A Foundations of Crystallography 49, no. 6 (1993): 818–24. http://dx.doi.org/10.1107/s0108767393003794.

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An X-ray interference phenomenon associated with the superposition of reflected waves corresponding to the different diffraction types may be observed for finite polyhedral crystals. Using plane-wave solutions, the interference patterns are analyzed for the two specific geometries of the crystal profile. The computer simulations supplement the theoretical inferences and fit the experimental results.

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7

Gog, T., A. Hille, D. Bahr, and G. Materlik. "Dispersive x‐ray standing wave measurements." Review of Scientific Instruments 66, no. 2 (1995): 1522–24. http://dx.doi.org/10.1063/1.1145897.

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8

Glover, T. E., D. M. Fritz, M. Cammarata, et al. "X-ray and optical wave mixing." Nature 488, no. 7413 (2012): 603–8. http://dx.doi.org/10.1038/nature11340.

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9

Kaiser, N., J. Meyer‐ter‐Vehn, and R. Sigel. "The x‐ray‐driven heating wave." Physics of Fluids B: Plasma Physics 1, no. 8 (1989): 1747–52. http://dx.doi.org/10.1063/1.858902.

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10

Yakovleva, S. I., M. A. Dalin, O. A. Krupnina, and V. A. Krupennikov. "Study of the attenuation of ultrasonic oscilliations in 3D-orthogonal woven composite." Voprosy Materialovedeniya, no. 1(113) (April 26, 2023): 83–93. http://dx.doi.org/10.22349/1994-6716-2023-113-1-83-93.

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The particularities of 3D-woven composite’s defects are observed. Automated ultrasonic immersion through-transmission technique for their non-destructive testing is offered. X-ray computed tomography (X-ray CT) application for the definition of the reasons of ultrasonic waves high attenuation in 3D-orthogonal woven composite sample is described. The analysis of defects detected with X-ray CT is shown. The suggestion about connection between quantity of projection of defects total area at the plane which is perpendicular to ultrasonic wave propagation and ultrasonic wave attenuation has been ma

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11

Wojda, P., and S. Kshevetskii. "Oriented Gaussian beams for high-accuracy computation with accuracy control of X-ray propagation through a multi-lens system." Journal of Synchrotron Radiation 26, no. 2 (2019): 363–72. http://dx.doi.org/10.1107/s1600577518017368.

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A highly accurate method for calculating X-ray propagation is developed. Within this approach, the propagating wave is represented as a superposition of oriented Gaussian beams. The direction of wave propagation in each Gaussian beam agrees with the local direction of propagation of the X-ray wavefront. When calculating the propagation of X-ray waves through lenses, the thin lens approximation is applied. In this approximation, the wave parameters change discontinuously when the wave passes through a lens; the corresponding explicit formulae are derived. The theory is applied to highly accurat

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12

YAMANAKA, TOSHIRO, and SHOZO INO. "ELECTRON STANDING WAVES AT A SURFACE DURING REFLECTION HIGH ENERGY ELECTRON DIFFRACTION AND APPLICATION TO STRUCTURE ANALYSIS." International Journal of Modern Physics B 14, no. 21 (2000): 2171–222. http://dx.doi.org/10.1142/s0217979200002326.

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During observation of reflection high energy electron diffraction (RHEED), the interference between the incident and diffracted beams leads to the formation of surface electron standing waves. Characteristic X-ray emission is strongly excited if the atom exists in a strong wave field. Therefore, X-ray yields depends on the position of the atom and incident glancing angle (θg) of the electron beam, since the distribution of these waves changes with θg. Such anomalous intensities of X-ray emission are clearly observed under both Bragg and surface wave resonance conditions. By using these intensi

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13

Mercère, Pascale, Mourad Idir, Thierry Moreno, and Gilles Cauchon. "Technical Report: X-ray Wave-Front Measurements and X-ray Active Optics." Synchrotron Radiation News 19, no. 4 (2006): 28–33. http://dx.doi.org/10.1080/08940880601186282.

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14

Beloborodov, Andrei M. "Monster Radiative Shocks in the Perturbed Magnetospheres of Neutron Stars." Astrophysical Journal 959, no. 1 (2023): 34. http://dx.doi.org/10.3847/1538-4357/acf659.

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Abstract Magnetospheres of neutron stars can be perturbed by star quakes, interaction in a binary system, or sudden collapse of the star. The perturbations are typically in the kilohertz band and excite magnetohydrodynamic waves. We show that compressive magnetospheric waves steepen into monster shocks, possibly the strongest shocks in the Universe. The shocks are radiative, i.e., the plasma energy is radiated before it crosses the shock. As the kilohertz wave with the radiative shock expands through the magnetosphere, it produces a bright X-ray burst. Then, it launches an approximately adiaba

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15

Suzuki, Yoshio, Atsushi Momose, and Hiroshi Sugiyama. "Characterization of windows and filters for coherent X-ray beamlines." Journal of Synchrotron Radiation 5, no. 3 (1998): 596–99. http://dx.doi.org/10.1107/s0909049597020165.

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Beryllium windows and graphite heat absorbers used in coherent X-ray beamlines must be optically flat. If the optical path through the window varies by more than λ/4, the X-ray wave front will be distorted after passing through the window, and the divergence of the X-ray beam may be increased. This reduces the beam coherence. Beryllium, graphite and Kapton films have been tested using ultra-small-angle X-ray scattering. Wave-front distortion was also directly observed by means of phase-contrast X-ray microradiography. The measured increase of angular divergence is about 4 µrad. The wave-front

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16

Heskett, D., X. Shi, C. Su, et al. "X-ray standing wave measurements of adsorbates on metal surfaces." Proceedings, annual meeting, Electron Microscopy Society of America 53 (August 13, 1995): 94–95. http://dx.doi.org/10.1017/s0424820100136842.

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One of the main goals in surface science is the determination of the geometric structure of the surface, including the local registry of adsorbed atoms and molecules on surfaces. The X-ray Standing Wave (XSW) technique offers a powerful method of locating the positions of atoms and molecules in and on single crystals1. This technique is now being employed with increasing frequency with the availability of x-ray radiation synchrotron sources, but is still underutilized with regards to structural determinations of adsorbates on metal surfaces.When x rays are Bragg-reflected from a crystal, the i

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17

Materlik, G. "X-ray standing wave applications in crystallography." Acta Crystallographica Section A Foundations of Crystallography 43, a1 (1987): C203. http://dx.doi.org/10.1107/s0108767387080073.

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18

Usami, K., T. Hirano, N. Kobayashi, Y. Tajima, and T. Imagawa. "Investigation of Multi-wave X-Ray Reflectometry." Journal of the Magnetics Society of Japan 24, no. 4−2 (2000): 551–54. http://dx.doi.org/10.3379/jmsjmag.24.551.

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19

Ishikawa, Tetsuya, Seishi Kikuta, and Kazutaka Kohra. "Angle-Resolved Plane Wave X-Ray Topography." Japanese Journal of Applied Physics 24, Part 2, No. 7 (1985): L559—L562. http://dx.doi.org/10.1143/jjap.24.l559.

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20

Tanaka, Satoshi, and Shaul Mukamel. "X-ray four-wave mixing in molecules." Journal of Chemical Physics 116, no. 5 (2002): 1877–91. http://dx.doi.org/10.1063/1.1429950.

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21

Afanasev, A. M., R. M. Imamov, E. Kh Mukhamedzhanov, and A. A. Bzheumikhov. "Double-channel X-ray standing wave technique." Physica Status Solidi (a) 116, no. 1 (1989): 197–201. http://dx.doi.org/10.1002/pssa.2211160117.

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22

DOLOCAN, ANDREI, and J. FRISO VAN DER VEEN. "X-RAY PROPAGATION IN TAPERED PLANAR WAVEGUIDE." International Journal of Modern Physics B 17, no. 11 (2003): 2213–57. http://dx.doi.org/10.1142/s0217979203018156.

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The present paper focuses on the tapered planar waveguide solution for an initial given wave form. The algorithm is constructed in distributions space such that the calculations can be actually computed by taking some hypothesis regarding the mode series which appear. The whole argument leads to the conclusion that the wave is compressed towards the waveguide in the direction of tilting, leading thereafter to a focusing phenomena. We present two alternative constructions in order to compute the convolution which gives the wave inside the waveguide. The hypothesis are providing results in good

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23

Wang, Dengwang, Yong Gao, Sheng Wang, Jie Wang, and Haipeng Li. "Study on X-ray Induced Two-Dimensional Thermal Shock Waves in Carbon/Phenolic." Materials 14, no. 13 (2021): 3553. http://dx.doi.org/10.3390/ma14133553.

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Carbon/Phenolic (C/P), a typical anisotropic material, is an important component of aerospace and often used to protect the thermodynamic effects of strong X-ray radiation. In this paper, we establish the anisotropic elastic-plastic constitutive model, which is embedded in the in-house code “RAMA” to simulate a two-dimensional thermal shock wave induced by X-ray. Then, we compare the numerical simulation results with the thermal shock wave stress generated by the same strong current electron beam via experiment to verify the correctness of the numerical simulation. Subsequently, we discuss and

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24

Holstad, Theodor Secanell, Trygve Magnus Ræder, Mads Carlsen, et al. "X-ray free-electron laser based dark-field X-ray microscopy: a simulation-based study." Journal of Applied Crystallography 55, no. 1 (2022): 112–21. http://dx.doi.org/10.1107/s1600576721012760.

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Dark-field X-ray microscopy (DFXM) is a nondestructive full-field imaging technique providing three-dimensional mapping of microstructure and local strain fields in deeply embedded crystalline elements. This is achieved by placing an objective lens in the diffracted beam, giving a magnified projection image. So far, the method has been applied with a time resolution of milliseconds to hours. In this work, the feasibility of DFXM at the picosecond time scale using an X-ray free-electron laser source and a pump–probe scheme is considered. Thermomechanical strain-wave simulations are combined wit

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25

Huang, Hsin-hui, Takeshi Nagashima, Wei-hung Hsu, Saulius Juodkazis, and Koji Hatanaka. "Dual THz Wave and X-ray Generation from a Water Film under Femtosecond Laser Excitation." Nanomaterials 8, no. 7 (2018): 523. http://dx.doi.org/10.3390/nano8070523.

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Simultaneous emission of the THz wave and hard X-ray from thin water free-flow was induced by the irradiation of tightly-focused femtosecond laser pulses (35 fs, 800 nm, 500 Hz) in air. Intensity measurements of the THz wave and X-ray were carried out at the same time with time-domain spectroscopy (TDS) based on electro-optic sampling with a ZnTe(110) crystal and a Geiger counter, respectively. Intensity profiles of the THz wave and X-ray emission as a function of the solution flow position along the incident laser axis at the laser focus show that the profile width of the THz wave is broader

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26

Afanas’ev, A. M., M. A. Chuev, R. M. Imamov, É. M. Pashaev, S. N. Yakunin, and J. Horvat. "Double-crystal X-ray diffractometry in the role of X-ray standing-wave method." Journal of Experimental and Theoretical Physics Letters 74, no. 10 (2001): 498–501. http://dx.doi.org/10.1134/1.1446544.

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27

Funabashi, M., T. Ohta, T. Yokoyama, Y. Kitajima, and H. Kuroda. "Compact fluorescence x‐ray detector for surface EXAFS and x‐ray standing wave measurements." Review of Scientific Instruments 60, no. 7 (1989): 2505–8. http://dx.doi.org/10.1063/1.1140713.

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28

Bowler, Sue. "What's next for X-ray spectroscopy?" Astronomy & Geophysics 60, no. 5 (2019): 5.31–5.33. http://dx.doi.org/10.1093/astrogeo/atz179.

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29

JIANG, S. S., and Y. QIU. "THE SIMULATION OF MODULATED PENDELLÖSUNG FRINGES OF PERFECT CRYSTALS FOR SPHERICAL X-RAY WAVE." Modern Physics Letters B 03, no. 04 (1989): 319–23. http://dx.doi.org/10.1142/s0217984989000510.

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The modulation in Pendellösung fringe visibility in perfect crystal is due to the interference between σ and π polarization states of X-ray wave. It is simulated by superposition of two polarization states by computer based on spherical X-ray wave dynamical theory and compared with fringe pattern on X-ray diffraction section topograph. It is found that the agreement between experimental result and theoretical calculation is satisfactory.

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30

Stetsko, Yuri P., and Shih-Lin Chang. "Three-wave X-ray diffraction: an analysis scheme of the sensitivity in determining triplet phase invariants." Acta Crystallographica Section A Foundations of Crystallography 55, no. 4 (1999): 683–94. http://dx.doi.org/10.1107/s0108767398017838.

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A model for analysing the phase sensitivity of the reflection coefficients of a diffracted wave in the case of three-wave X-ray diffraction is proposed. This model considers three-wave diffraction as the interference of the directly excited and the Umweg-excited diffracted waves and seems to account properly for the phase sensitivity as well as the behaviour of an involved diffracted wave as a function of the triplet phase invariant, the polarization state of the incident wave and the diffraction geometry. The practical issues for phase determination are also considered.

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31

Cserháti, Csaba, Z. Erdélyi, Z. Balogh, et al. "Characterization of Intermetallic Layer with Nanoresolution Using X-Ray Standing Wave Technique." Defect and Diffusion Forum 289-292 (April 2009): 369–75. http://dx.doi.org/10.4028/www.scientific.net/ddf.289-292.369.

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X-ray standing wave technique has been used to measure the kinetics of CoSi intermetallic phase growth in a-Si/Co/a-Si sandwich structure. The a-Si/Co/a-Si arrangement were placed into a waveguide structure formed by two Ta films. X-ray fluorescence and extended X-ray absorption fine structure analysis has been used in a combination with X-ray standing wave technique for depth profiling with sub-nanometer resolution of specimens annealed at 493K for different annealing time. The position and the thickness of the growing CoSi intermetallic phase have been monitored.

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32

Kshevetskii, S., P. Wojda, and V. Maximov. "A high-accuracy complex-phase method of simulating X-ray propagation through a multi-lens system." Journal of Synchrotron Radiation 23, no. 6 (2016): 1305–14. http://dx.doi.org/10.1107/s1600577516013333.

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The propagation of X-ray waves through an optical system consisting of many X-ray refractive lenses is considered. For solving the problem for an electromagnetic wave, a finite-difference method is applied. The error of simulation is analytically estimated and investigated. It was found that a very detailed difference grid is required for reliable and accurate calculations of the propagation of X-ray waves through a multi-lens system. The reasons for using a very detailed difference grid are investigated. It was shown that the wave phase becomes a function, very quickly increasing with increas

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33

Schelokov, Igor A., Dmitry V. Roshchupkin, Dmitry V. Irzhak, and Remi Tucoulou. "Dynamical theory for calculations of X-ray spectra from crystals modulated by surface acoustic waves." Journal of Applied Crystallography 37, no. 1 (2004): 52–61. http://dx.doi.org/10.1107/s0021889803023847.

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The dynamical theory was used to model X-ray diffraction by the YZ-cut of an LiNbO3crystal modulated by surface acoustic waves (SAWs). It includes both the calculation of the crystal lattice deformation, induced by a surface wave of Rayleigh type, and the simulation of X-ray wavefields in the crystal based on Takagi–Taupin equations. A detailed discussion is included on the effect of peak splitting occurring at high acoustic amplitudes. The developed theory entirely describes this effect and proves to be a powerful tool for understanding X-ray diffractometry and topography measurements by SAW-

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34

Thomas, G., K. M. Krishnan, Y. Yokota, and H. Hashimoto. "Voltage and Orientation Dependence of Characteristic X-Ray Production in Thin Crystals." Proceedings, annual meeting, Electron Microscopy Society of America 43 (August 1985): 414–15. http://dx.doi.org/10.1017/s0424820100118941.

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For crystalline materials, an incident plane wave of electrons under conditions of strong dynamical scattering sets up a standing wave within the crystal. The intensity modulations of this standing wave within the crystal unit cell are a function of the incident beam orientation and the acceleration voltage. As the scattering events (such as inner shell excitations) that lead to characteristic x-ray production are highly localized, the x-ray intensities in turn, are strongly determined by the orientation and the acceleration voltage. For a given acceleration voltage or wavelength of the incide

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35

Mukhamedzhanov, E. Kh, and C. Bocchi. "Quantitative X-ray standing-wave phase analysis by means of photoelectrons." Journal of Applied Crystallography 33, no. 6 (2000): 1430–33. http://dx.doi.org/10.1107/s0021889800012036.

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Quantitative information on a subsurface layer structure is obtained through the determination of the photoelectron escape depth by using the photoelectrons emitted by an X-ray standing wavefield in the range of dynamical X-ray diffraction from high-quality crystals. A simple method to determine the mean escape depthLof low-energy-loss photoelectrons is proposed, based on the analysis of the phase of the X-ray standing wavefield in a specially designed epitaxic structure grown by molecular-beam epitaxy. The valueL= 24 nm is obtained for GaSb crystals with CuKα1radiation as a probe. As an examp

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36

NEGISHI, Riichirou, Tomoe FUKAMACHI, and Takaaki KAWAMURA. "X-Ray Standing Wave in Resonant Dynamical Diffraction." Nihon Kessho Gakkaishi 42, no. 6 (2000): 497–503. http://dx.doi.org/10.5940/jcrsj.42.497.

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37

MOMOSE, ATSUSHI. "Nobel X-ray Imaging Using its Wave Nature." Japanese Journal of Radiological Technology 56, no. 8 (2000): 985–91. http://dx.doi.org/10.6009/jjrt.kj00001357032.

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38

Mustre de Leon, J., J. J. Rehr, S. I. Zabinsky, and R. C. Albers. "Ab initiocurved-wave x-ray-absorption fine structure." Physical Review B 44, no. 9 (1991): 4146–56. http://dx.doi.org/10.1103/physrevb.44.4146.

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39

Greene, James W. "Paraxial wave-optics simulation of x-ray lasers." Physical Review E 48, no. 4 (1993): 3130–60. http://dx.doi.org/10.1103/physreve.48.3130.

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40

Sung, Yongjin, Colin J. R. Sheppard, George Barbastathis, Masami Ando, and Rajiv Gupta. "Full-wave approach for x-ray phase imaging." Optics Express 21, no. 15 (2013): 17547. http://dx.doi.org/10.1364/oe.21.017547.

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41

Ishikawa, T. "Recent developments in plane wave X-ray topography." Acta Crystallographica Section A Foundations of Crystallography 49, s1 (1993): c358. http://dx.doi.org/10.1107/s0108767378089990.

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42

Sauer, W., T. H. Metzger, J. Peisl, Y. Avrahami, and E. Zolotoyabko. "X-Ray diffraction under surface acoustic wave excitation." Physica B: Condensed Matter 248, no. 1-4 (1998): 358–65. http://dx.doi.org/10.1016/s0921-4526(98)00265-8.

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43

Ritman, Erik L. "X-ray Phase-Based Imaging: The Third Wave." Academic Radiology 16, no. 8 (2009): 909–10. http://dx.doi.org/10.1016/j.acra.2009.06.003.

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44

Balyan, Minas K., Levon V. Levonyan, and Karapet G. Trouni. "Spherical-wave X-ray dynamical diffraction Talbot effect inside a crystal." Acta Crystallographica Section A Foundations and Advances 76, no. 4 (2020): 494–502. http://dx.doi.org/10.1107/s2053273320005781.

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Two-wave dynamical diffraction of an X-ray spherical wave in a crystal, when the wave passes through an object with a periodic amplitude transmission function, is considered. The behavior of the diffracted wave (spherical-wave Talbot effect) in the crystal is investigated. The Talbot effect inside the crystal is accompanied by the focusing effect and the pendulum effect. Peculiarities of the effect before the focus point, in the focusing plane and in the region after the focus point inside the crystal are revealed. An expression is found for the Talbot depth and the spherical-wave Talbot effec

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45

Yuan, Yajie, Andrei M. Beloborodov, Alexander Y. Chen, Yuri Levin, Elias R. Most, and Alexander A. Philippov. "Magnetar Bursts Due to Alfvén Wave Nonlinear Breakout." Astrophysical Journal 933, no. 2 (2022): 174. http://dx.doi.org/10.3847/1538-4357/ac7529.

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Abstract The most common form of magnetar activity is short X-ray bursts, with durations from milliseconds to seconds, and luminosities ranging from 1036–1043 erg s−1. Recently, an X-ray burst from the galactic magnetar SGR 1935+2154 was detected to be coincident with two fast radio burst (FRB) like events from the same source, providing evidence that FRBs may be linked to magnetar bursts. Using fully 3D force-free electrodynamics simulations, we show that such magnetar bursts may be produced by Alfvén waves launched from localized magnetar quakes: a wave packet propagates to the outer magneto

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46

Zhao, Litao, Minjiang Chen, Fan Wu, Yang Liu, Xuqing Wang, and Yuxin Wang. "Study on the Shallow Decay Segment of Gamma-Ray Burst X-Ray Afterglow." Astrophysical Journal 979, no. 2 (2025): 186. https://doi.org/10.3847/1538-4357/ada0b9.

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Abstract The X-ray afterglow of a certain fraction of gamma-ray bursts (GRBs) comprises a phase of shallow decay. However, the origin of the shallow decay segment is still a mystery. In this paper, we select 103 GRBs that exhibit a shallow decay segment, based on Swift/XRT data prior to 2023 June. We apply the fallback accretion energy external dissipation model to the shallow decay segment in our sample, and find the model can interpret the shallow decay segment within a reasonable range of parameter space. The fallback rate of the progenitor envelope materials onto the accretion disk can rea

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47

Per, Lindh, and Lemenkova Polina. "Seismic monitoring of strength in stabilized foundations by P-wave reflection and downhole geophysical logging for drill borehole core." Journal of the Mechanical Behavior of Materials 32 (June 14, 2023): 20220290. https://doi.org/10.5281/zenodo.8040172.

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Evaluating the subground properties during the initial stage of a construction of building is important in order to estimate the suitability of soil quality to the technical requirements of bearing capacity, resistance to stress, and strength. This study presented the evaluation of the geotechnical properties of soil intended for the construction of Max IV facility of Lund University, performed in fieldwork and laboratory. The in situ methods included drilling boreholes, core sampling and assessment, crosshole measurements, and borehole logging. The laboratory-based measurements were performed

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Kyutt, Reginald, and Mikhail Scheglov. "Three-wave X-ray diffraction in distorted epitaxial structures." Journal of Applied Crystallography 46, no. 4 (2013): 861–67. http://dx.doi.org/10.1107/s0021889813011709.

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Three-wave diffraction has been measured for a set of GaN, AlN, AlGaN and ZnO epitaxial layers grown on c-sapphire. A Renninger scan for the primary forbidden 0001 reflection was used. For each of the three-wave combinations, θ-scan curves were measured. The intensity and angular width of both φ- and θ-scan three-wave peaks were analyzed. The experimental data were used to determine properties of the multiple diffraction pattern in highly distorted layers. It is shown that the FWHM of θ scans is highly sensitive to the structural perfection and strongly depends on the type of three-wave combin

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van Eerten, Hendrik. "Gamma-ray burst afterglow blast waves." International Journal of Modern Physics D 27, no. 13 (2018): 1842002. http://dx.doi.org/10.1142/s0218271818420026.

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The various stages of baryonic gamma-ray burst (GRB) afterglow blast waves are reviewed. These are responsible for the afterglow emission from which much of our understanding of gamma-ray bursts derives. Initially, the blast waves are confined to the dense medium surrounding the burster (stellar envelope or dense wind), giving rise to a jet-cocoon structure. A massive ejecta is released and potentially fed by ongoing energy release from the burster and a forward–reverse shock system is set up between ejecta and ambient density. Ultimately the blast wave spreads sideways and slows down, and the

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I.L. Shul’pina, E.V. Suvorov, I.A. Smirnova, and T.S. Argunova. "Section methods of X-Ray diffraction topography." Technical Physics 92, no. 10 (2022): 1277. http://dx.doi.org/10.21883/tp.2022.10.54354.23-22.

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X-ray topography is a group of methods for obtaining diffraction images of structural defects in crystals. Among them, section topography techniques are distinguished by their abilities in acquiring quantitative information about defects based on the analysis of the images. For this purpose, special applications of the dynamic theory of X-ray diffraction are being developed. The interference of wave fields excited in a crystal by an X-ray beam is the basis of the section methods. Their sensitivity to weak lattice distortions is much higher than that of other X-ray methods. This review describe

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