Total neutron cross sections of magnesium, aluminum, silicon, zirconium, niobium and molybdenum in energy range from 0.001 to 0.3 eV.
Total neutron cross sections of magnesium, aluminum, silicon, zirconium, niobium and molybdenum in energy range from 0.001 to 0.3 eV.
复制标题
镁、铝、硅、锆、铌和钼的总中子截面能量范围为 0.001 至 0.3 eV。
DOI：
10.3327/jnst.20.713
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
H. Kadotani
中科院分区：
文献类型：
--
作者：
O. Aizawa;Tetsuo Matsumoto;H. Kadotani
利用武藏工业大学研究堆的斩波器和飞行时间装置，测量了Mg、Al、Si、Zr、Nb和Mo在室温下0.001- 0.3eV能量范围内的中子总截面。对固体和粉末样品进行了实验。分别采用THRUSH程序和UNCLE-TOM程序计算了这些样品的非弹性和弹性散射截面，计算结果与实验结果吻合较好.对于粉末样品，在Bragg截止点以上的测量值与理论值吻合较好，而在Bragg截止点以下的测量值则大于理论值，采用粉末和固体样品分别在Bragg截止点以上和以下的能量范围内的测量值，所得的实验截面与理论值吻合较好。
Total neutron cross sections of Mg, Al, Si, Zr, Nb and Mo at room temperature have been measured in the energy range of 0.001-0.3 eV using a chopper and TOF facility of the Musashi Institute of Technology Research Reactor. The experiments were performed for solid and powdered samples. For these samples inelastic and elastic scattering cross sections were respectively calculated with the THRUSH code assuming Debye-type frequency spectrum and with the UNCLE-TOM code using crystal structure and lattice constants of each sample.For solid samples the measured cross sections agreed well with the calculations below the Bragg cut-off energies. For the powdered samples there were good agreements above the Bragg cut-off, and the measurements were larger than the calculations below the Bragg cut-off.The experimental cross section, adopting the results of powdered and solid samples for energy ranges above and below the Bragg cut-off respectively, agreed well with the calcula-tion which was performed for the samples in perfect polycrystalline state.