Differential Neutron Production Cross Sections and Neutron Yields from Stopping-Length Targets for 113-MeV Protons
Differential Neutron Production Cross Sections and Neutron Yields from Stopping-Length Targets for 113-MeV Protons
复制标题
113-MeV 质子停止长度目标的微分中子产生截面和中子产额
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
W. Amian
中科院分区：
文献类型：
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作者：
M. Meier;D. Clark;C. Goulding;J. McClelland;G. Morgan;C. Moss;W. Amian
我们测量了微分（P,xin）截面，d/sup 2/sigma/d…对于113 MeV质子轰击元素铍、碳、铝、铁和贫铀，从薄靶得到dE/sub / n/，从停止长度靶得到的绝对中子产量为7.5/度/、30/度/、60/度/和150/度/。额外的横截面测量报告了氧，钨和铅。我们使用飞行时间技术来识别和区分背景，并确定中子能谱。用HETC代码将实验数据与核内级联蒸发模型计算结果进行比较，发现微分截面上的差异高达7倍。这些不同截面上的差异使得我们有可能在停采长度产量比较中发现一些很好的一致性，因为在不同的能源制度下偶然消除了不正确的产量估计。参13。， 20个无花果。， 4个标签。
We have measured differential (P,xin) cross sections, d/sup 2/sigma/d..cap omega..dE/sub n/, from thin targets and absolute neutron yields from stopping-length targets at angles of 7.5/degree/, 30/degree/, 60/degree/, and 150/degree/, for the 113--MeV proton bombardment of elemental beryllium, carbon, aluminum, iron, and depleted uranium. Additional cross-section measurements are reported for oxygen, tungsten, and lead. We used time-of-flight techniques to identify and discriminate against backgrounds and to determine the neutron energy spectrum. Comparison of the experimental data with intranuclear-cascade evaporation-model calculations with the code HETC showed discrepancies as high as a factor of 7 in the differential cross sections. These discrepancies in the differential cross sections make it possible to identify some of the good agreement seen in the stopping-length yield comparisons as fortuitous cancellation of incorrect production estimates in different energy regimes. 13 refs., 20 figs., 4 tabs.