Improvement of photonuclear reaction model below 140 MeV in the PHITS code
Improvement of photonuclear reaction model below 140 MeV in the PHITS code
复制标题
PHITS代码中140 MeV以下光核反应模型的改进
DOI：
10.1080/00223131.2014.923349
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发表时间：
2015
影响因子：
1.2
通讯作者：
K. Niita
中科院分区：
文献类型：
--
作者：
S. Noda;S. Hashimoto;Tatsuhiko Sato;T. Fukahori;S. Chiba;K. Niita
对粒子和重离子输运程序PHITS中的光核反应模型进行了改进，使其适用于入射光子能量低于140 MeV的情况。采用日本评价核数据库（JENDL）光核数据文件2004（JENDL/PD-2004）确定总反应截面。通过在同位旋选择定则下修正轻核的衰变宽度，改进了PHITS中原子核激发后的统计衰变模型，合理地再现了退激发过程中的质子和中子发射. PHITS中引入了准中子衰变过程，以处理入射光子能量高达140 MeV的光核反应。通过与实验文献数据的比较，验证了改进的准确性。改进后的PHITS可用于各种实际应用，如X射线治疗中的中子剂量估计。
The photonuclear reaction model in the particle and heavy ion transport code system (PHITS) code is improved for incident photon energies below 140 MeV. Japanese Evaluated Nuclear Data Library (JENDL) Photonuclear Data File 2004 (JENDL/PD-2004) is adopted to determine the total reaction cross section. The statistical decay model after excitation of the nucleus in PHITS is improved by modifying the decay widths for light nuclei under the isospin selection rule to reasonably reproduce the proton and neutron emission in the de-excitation process. The quasideuteron disintegration process is newly introduced into PHITS to handle the photonuclear reaction up to 140 MeV of incident photon energy. The accuracy of the improvements was verified by comparison with the experimental literature data. The improved PHITS can contribute to various practical applications such as neutron dose estimation in X-ray therapy.
影响因子：
1.2
作者：
Sato, Tatsuhiko;Niita, Koji;Sihver, Lembit
通讯作者：
Sihver, Lembit