Effects of the photon cross sections and energy-absorption coefficients of air to the gamma-ray point isotropic exposure buildup factors
Journal Article
·
· Nuclear Science and Engineering
OSTI ID:413351
- National Lab. for High Energy Physics, Tsukuba, Ibaraki (Japan)
The effects of using different photon cross-section libraries and energy-absorption coefficients on the gamma-ray point isotropic exposure buildup factors up to 40 mean free path (mfp) were studied using the EGS4 Monte Carlo code for water, iron, and lead from the 0.1- to 10-MeV energy regions. Differences due to the cross sections used exist, but are small, <10%, except those for lead at 0.1 and 10 MeV. The differences in the case of lead increase along with an increase in the depth and are nearly 30% at 40 mfp depth. The effects of using different energy-absorption coefficients of air are <2%.
- OSTI ID:
- 413351
- Journal Information:
- Nuclear Science and Engineering, Journal Name: Nuclear Science and Engineering Journal Issue: 2 Vol. 124; ISSN NSENAO; ISSN 0029-5639
- Country of Publication:
- United States
- Language:
- English
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