Measurements and calculations of neutron spectra from 35 MeV deuterons on thick lithium for the FMIT facility
Measurements and calculations of neutron spectra from 35 MeV deuterons on thick lithium for the FMIT facility
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FMIT 设施厚锂上 35 MeV 氘核的中子谱测量和计算
DOI：
10.1016/0022-3115(79)90532-4
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发表时间：
1979
影响因子：
3.1
通讯作者：
W. G. Wyckoff
中科院分区：
文献类型：
--
作者：
D. Johnson;F. Mann;J. Watson;J. Ullmann;W. G. Wyckoff
在厚的天然锂靶上测量了35 MeV氘核的中子产率和能谱。使用飞行时间技术获得的数据在角范围为0°至150°，中子能量约为1至50 MeV。一个描述中子产生的不同截面的简单核模型被调整以符合这些新的厚靶数据。对40 MeV氘核模型进行调整后，得到了与以往ORNL厚靶数据一致的模型参数。我们的实验数据与基于ORNL飞行时间数据的模型预测非常一致，但略低于基于ORNL剂量学数据的预测。最后利用该模型预测了FMIT试验池中最高通量位置的中子能谱。
Neutron yields and energy spectra were measured for 35 MeV deuterons on a thick target of natural lithium. Data were obtained using the time-of-flight technique over an angular range of 0° to 150° and for neutron energies from about 1 to 50 MeV. A simple nuclear model that describes the differential cross sections of neutron production was adjusted to agree with these new thick target data. Different model parameters were obtained when the model was adjusted to agree with previous ORNL thick target data for 40 MeV deuterons. Our experimental data are in good agreement with model predictions based upon the ORNL time-of-flight data but are somewhat lower than predictions based upon the ORNL dosimetry data. Finally the model was used to predict the neutron spectrum at the position of highest flux in the FMIT test cell.