Influence of distant scatterer on air kerma measurement in the evaluation of diagnostic X-rays using Monte Carlo simulation

2021 ◽  
Author(s):  
Masahide Tominaga ◽  
Yukari Nagayasu ◽  
Motoharu Sasaki ◽  
Takuya Furuta ◽  
Hiroaki Hayashi ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
X Rays ◽  
Air Kerma

Monte Carlo Simulation of Self-Absorption Effects in Elemental XRF Analysis of Atmospheric Particulates Collected on Filters

1975 ◽  
Vol 19 ◽  
pp. 323-337 ◽  
Author(s):  
A. R. Hawthorne ◽  
R. P. Gardner ◽  
T. G. Dzubay
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Size Range ◽  
Thick Layer ◽  
Thin Layers ◽  
Analytical Models ◽  
Enhancement Effect ◽  
X Rays ◽  
Atmospheric Particulates ◽  
Cylinders And Spheres

Monte Carlo simulation is used to determine the effects of selfabsorption for the low energy X-rays of light elements in the size range front 1 to 20 μm. Calculations are performed for a wide angle Fe-55 radioisotope-excited energy dispersive XRF system. Results are obtained for sulfur attenuation in thin layers, long cylinders, and spheres composed of various matrix materials. The enhancement effect is also treated for the transition region between thin and thick layer samples as well as in spheres of various sizes. Results are also comrpared to fixed angle analytical models.

Monte Carlo Simulation of Generations of Continuous and Characteristic X-Rays by Electron Impact

2000 ◽  
Vol 39 (Part 1, No. 5A) ◽  
pp. 2863-2864 ◽  
Author(s):  
Kentaro Fujii ◽  
Takaharu Nagatomi ◽  
Yoshihide Kimura ◽  
Yoshizo Takai ◽  
Ryuichi Shimizu ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Electron Impact ◽  
X Rays

Monte Carlo simulation study of the Fano factor,wvalue, and energy resolution for the absorption of soft x rays in xenon–neon gas mixtures

2001 ◽  
Vol 89 (12) ◽  
pp. 8202-8213 ◽  
Author(s):  
F. P. Santos ◽  
T. H. V. T. Dias ◽  
P. J. B. M. Rachinhas ◽  
C. A. N. Conde ◽  
A. D. Stauffer
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Energy Resolution ◽  
Simulation Study ◽  
Fano Factor ◽  
Gas Mixtures ◽  
X Rays ◽  
Monte Carlo Simulation Study ◽  
Neon Gas

scholarly journals Hard X-Rays and Gamma-Rays from SN 1987A

1988 ◽  
Vol 108 ◽  
pp. 446-447 ◽  
Author(s):  
M. Itoh ◽  
S. Kumagai ◽  
T. Shigeyama ◽  
K. Nomoto ◽  
J. Nishimura
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Gamma Rays ◽  
Mass Fraction ◽  
Heavy Elements ◽  
X Rays ◽  
X Ray ◽  
Sn 1987A ◽  
Mass Fractions ◽  
Theoretical Predictions

Gamma-rays originating from radioactive decays of 56Ni and 56Co and hard X-rays due to Compton degradation of γ-rays have been predicted to emerge when the supernova becomes sufficiently thin. The X-ray detections by Ginga (Dotani et al. 1988) and Kvant (Sunyaev et al. 1988) and more recent report of γ-ray detections by SMM (Matz et al. 1988) were much earlier than the theoretical predictions. (See Itoh et al. 1987 and references therein.)These observations would give important constraints on the distribution of the heavy elements and 56Co in the ejecta. We adopted the hydrodynamical model 11E1Y6 (Nomoto et al. 1988) and carried out Monte Carlo simulation for photon transfer. A step-like distribution of 56Co was assumed where the mass fraction of 56Co in the layers at Mr ≤ 4.6 M⊙, 4.6 − 6 M⊙, 6 − 8 M⊙, and 8 − 10 M⊙ are XCo = 0.0128, 0.0035, 0.0021, and 0.0011, respectively. Other heavy elements were distributed with mass fractions in proportion to 56Co.

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