Neutron-induced reactions using a γ-ray detector in aC12(α,γ)O16reaction study
Neutron-induced reactions using a γ-ray detector in aC12(α,γ)O16reaction study
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在 aC12(α,γ)O16 反应研究中使用 γ 射线探测器的中子诱发反应
DOI：
10.1103/physrevc.76.022801
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发表时间：
2007
影响因子：
3.1
通讯作者：
M. Igashira
中科院分区：
文献类型：
--
作者：
H. Makii;Y. Nagai;K. Mishima;M. Segawa;T. Shima;M. Igashira
在{sup 12}C({alpha},{gamma}){sup 16}O反应研究中，通过比较使用脉冲{alpha}束的NaI（Tl）探测器与先前使用连续{alpha}束的Ge探测器所获得的光谱，讨论了在{gamma}射线探测器内发生的中子诱导背景事件。两个光谱都包含由{sup 13}C和/或{sup 12}C富集靶中的{sup 9}Be上的（{alpha},n）反应产生的中子诱发的背景事件。这些观测结果与计算出的Ge同位素中子诱导反应的{伽马}射线谱表明，由此产生的背景事件在低{α}束能量的{sup 12}C({alpha},{gamma}){sup 16}O反应研究中成为重要的背景事件，而使用屏蔽材料几乎不会减少背景事件。
Neutron-induced background events occurring within a {gamma}-ray detector in the {sup 12}C({alpha},{gamma}){sup 16}O reaction study are discussed by comparing a spectrum taken by a NaI(Tl) detector with a pulsed {alpha} beam with that taken previously by a Ge detector using a continuous {alpha} beam. Both spectra contain such background events induced by neutrons from the ({alpha},n) reaction on {sup 13}C and/or {sup 9}Be contained in enriched {sup 12}C targets. These observations together with a calculated {gamma}-ray spectrum of the neutron-induced reaction by Ge isotopes indicate the thus-produced background events, which would barely be reduced by using shield materials, become significant background in the {sup 12}C({alpha},{gamma}){sup 16}O reaction study at low-{alpha}-beam energy.