A Comparison of Gamma-Ray Buildup Factors for Low-ZMaterial and for Low Energies Using Discrete Ordinates and Point Monte Carlo Methods
作者:
HarimaYoshiko,
HirayamaHideo,
IshikawaToshio,
SakamotoYukio,
ichShun,
期刊:
Nuclear Science and Engineering
(Taylor Available online 1987)
卷期:
Volume 96,
issue 3
页码: 241-252
ISSN:0029-5639
年代: 1987
DOI:10.13182/NSE87-A16385
出版商: Taylor&Francis
数据来源: Taylor
摘要:
AbstractExposure and absorbed dose buildup factors for a photon point source in infinite beryllium have been calculated in the low-energy range of 0.03 to 0.3 MeV, for penetration depths up to 40 mfp, using two discrete ordinates codes, PALLAS-PL,SP-Br and ANISN. Comparisons of both result to values obtained by point Monte Carlo calculations using the electron gamma shower version 4 code showed reasonable agreement for two types of sources: normally incident and point isotropic sources.The fitting parameters of a geometric-progression method formula were determined for the resulting buildup factor data. These fitting parameters are in good agreement with the basic data within 5% over a great variation in magnitude.
点击下载:
PDF (5467KB)
返 回