p（35）Be快中子辐射场生物剂量参数的测定

报道了ｐ（３５）Ｂｅ快中子、γ混合辐射场生物剂量参数，说明了采用双电离室方法测量ｐ（３５）Ｂｅ快中子时，剂量计算中有关因子和参数的确定原则和估算结果；给出了辐射场的中子／γ比，照射野内组织比释动能率分布，以及由比释动能率计算小鼠全身与局部照射和血液样品照射时的吸收剂量转换系数等剂量常参数；最后还对剂量测量的误差问题做了分析。

Determination of dosimetric parameters for p(35)Be fast ueutron field

The fast neutrons are produced by the nuclear reaction of 35 MeV protons from the accelerator with theberyllium target. Usually, it is neeessary to conduct relevant radiobiological experiments before a new fast neutronbeam is put into clinical use for the purpose of characterizing the neutron beam. As a dosimetric support to theradiobiological experimants, the neutron doses and the accompanying gamma ray dose in the p(35)Be neutron fieldwere measured with paired-chamber method. The determination methods and the values determined for the fac-tors and parameters used in dose calculation are described. The tissue kerma rate distributions in the irradiationfield are reported as well as the conversion coefficients from kerma to absorbed dose for experimental mice ofwhole body and thigh exppsure and for specimens of blood and cultured eells. Finally the errors of dose determina-tion are discussed.