Results 91 to 100 of about 586,724 (257)

Scattered X-rays in Obscured Active Galactic Nuclei and their Implications for Geometrical Structure and Evolution

, 2010
We construct a new sample of 32 obscured active galactic nuclei (AGNs) selected from the Second XMM-Newton Serendipitous Source Catalogue to investigate their multiwavelength properties in relation to the "scattering fraction", the ratio of the soft X ...
Antonucci, Awaki, Bassani, Bianchi, Comastri, de Grijp, Dong, Eguchi, Gorjian, Granato, Heckman, Hisamitsu Awaki, Ho, Hopkins, Hopkins, Imanishi, Imanishi, Imanishi, Kaastra, Kazuhisa Noguchi, Landi, Magorrian, Marconi, Matt, Mewe, Michael Koss, Nenkova, Noguchi, Risaliti, Risaliti, Risaliti, Shu, Smith, Teng, Tremaine, Turner, Ueda, Ueda, Wada, Wada, Winter, Winter, Yasuhiro Hashimoto, Yoshihiro Ueda, Yuichi Terashima, Yukiko Ishino   +45 more
core   +1 more source

Small-Angle Scattering and Diffusion: Application to Relativistic Shock Acceleration [PDF]

, 2002
We investigate ways of accurately simulating the propagation of energetic charged particles over small times where the standard Monte Carlo approximation to diffusive transport breaks down.
Donea, A. -C, Meli, A., Protheroe, R. J.
core   +4 more sources

Inverse scattering at high energies for the multidimensional Newton equation in a long range potential [PDF]

arXiv, 2013
We define scattering data for the Newton equation in a potential $V\in C^2(\R^n,\R)$, $n\ge2$, that decays at infinity like $r^{-\alpha}$ for some $\alpha\in (0,1]$. We provide estimates on the scattering solutions and scattering data and we prove, in particular, that the scattering data at high energies uniquely determine the short range part of the ...
arxiv  

Dose rate correction of a diode array for universal wedge field dosimetric verification

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose To study the performance of MapCHECK 3 (MC3) in measuring universal wedge fields and propose a dose rate correction strategy to improve MC3 measurement accuracy. Materials and methods Universal wedge fields with different wedge angles and field sizes were measured at different depths using MC3.
Linyi Shen, Mengyang Li, Guiyuan Li, Xinyuan Chen, Shouping Xu, Jianrong Dai, Yuan Tian   +6 more
wiley   +1 more source

Small-Angle X-ray and neutron scattering from diamond single crystals

, 2011
Results of Small-Angle Scattering study of diamonds with various types of point and extended defects and different degrees of annealing are presented. It is shown that thermal annealing and/or mechanical deformation cause formation of nanosized planar ...
A A Shiryaev, Bangert U, Bokii G B, Bursill L A, P Boesecke, Pal'yanov Yu N, Perret R G, Shiryaev A A, Shiryaev A A, Terminasov Yu S   +9 more
core   +1 more source

Monte Carlo modeling of radiation dose from radiation therapy with superficial x‐rays

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Introduction Superficial x‐rays (50–100 kVp) are used for treating non‐melanoma skin cancer and intraoperative radiation therapy (IORT). At these energies, the photoelectric effect significantly increases absorbed dose to bone compared to soft tissue.
Reham Barghash, Tiffany W. Martin, Amber R. Prebble, Del Leary   +3 more
wiley   +1 more source

Determination of the Vesicular Systems Parameters: Parallel Implementation and Analysis of the PTNS Vesicle Structure

EPJ Web of Conferences, 2018
Parameters of the phospholipid vesicular systems are determined by means of minimization of the discrepancy between experimental data on the small angle scattering intensity and the numerical results within the frame of the separated form factors method.
Bashashin Maxim, Zemlyanaya Elena, Zhabitskaya Evgeniya, Kiselev Mikhail, Sapozhnikova Tatyana   +4 more
doaj   +1 more source

The role of double helicity-flip amplitudes in small-angle elastic pp-scattering

, 2003
We asses a role of the double helicity-flip amplitudes in small-angle elastic pp-scattering and obtain a new unitary bound for the double helicity-flip amplitude F_2 in elastic pp-scattering at small values of t on the basis of the U-matrix method of the
Barshay, Bates, Blankenbecler, Buttimore, Edneral, Heitler, Kanavets, Kopeliovich, Logunov, N.E Tyurin, S.M Troshin, Savrin, Troshin, Troshin, Troshin   +14 more
core   +1 more source

Lippmann-Schwinger equation and the connection between the scattering operator and the scattering amplitude in the relativistic case [PDF]

arXiv, 2019
In this paper, we consider two types of the scattering problems (relativistic case), namely, the stationary scattering problem, where the distance $r$ tends to infinity, and the dynamical scattering problem, where the time $t$ tends to infinity. Using our results on Lippmann-Schwinger equation in the relativistic case, we found the connection between ...
arxiv  

Effects of simultaneous multislice acceleration on the stability of radiomics features in parametric maps of IVIM and DKI in uterine cervical cancer

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose The aim of this study was to investigate the influence of the simultaneous multislice acceleration (SMS) technique as well as two‐dimensional (2D) and three‐dimensional (3D) tumor segmentations on radiomics features (RFs) within the parametric maps of cervical cancer, which were computed by intravoxel incoherent motion (IVIM) and ...
Shuangquan Ai, Wei Peng, Rong Hou, Huiting Zhang, Robert Grimm, Zilong Yuan, Yulin Liu   +6 more
wiley   +1 more source