Endo S, Hoshi M, Suga S, Takada J, Komatsu K
Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan.
Phys Med Biol. 1996 Jun;41(6):1037-43. doi: 10.1088/0031-9155/41/6/007.
The neutron sensitivity of a C-CO2 ionization chamber has been experimentally determined in the neutron energy range of 0.1-1.2 MeV. Eleven kU data were obtained which ranged from 0.04 to 0.1 as a function of neutron energy. There were two peaks in the spectrum of the kU factor, and their positions corresponded to the resonance energies of the kerma factors of carbon dioxide, of which the energies are about 0.4 and 1 MeV. The present data agree with the data obtained at the National Institute for Radiological Sciences in Chiba, Japan (NIRS). The energy dependences of the sensitivity were calculated by using the kerma and the W-value ratios of gas to soft tissue for comparison. The experimental data were reproduced well by the calculations.
已在0.1 - 1.2 MeV的中子能量范围内通过实验确定了C - CO₂电离室的中子灵敏度。获得了11个kU数据，其范围为0.04至0.1，是中子能量的函数。kU因子谱中有两个峰值，其位置对应于二氧化碳比释动能因子的共振能量，其能量约为0.4 MeV和1 MeV。目前的数据与日本千叶国立放射科学研究所（NIRS）获得的数据一致。通过使用比释动能以及气体与软组织的W值比来计算灵敏度的能量依赖性以进行比较。计算结果很好地再现了实验数据。
