Measurement of neutron activation cross sections for major elements of water, air and soil between 30 and 70 MeV
Measurement of neutron activation cross sections for major elements of water, air and soil between 30 and 70 MeV
复制标题
测量 30 至 70 MeV 之间水、空气和土壤主要元素的中子活化截面
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
M. Baba
中科院分区：
文献类型：
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作者：
H. Yashima;K. Terunuma;Takashi Nakamura;M. Hagiwara;N. Kawata;M. Baba
利用设置在东北大学回旋加速器和放射性同位素中心（CYRIC）AVF回旋加速器上的半单能中子场，通过活化法测量了30至70 MeV之间的中子活化截面。水、空气和土壤中主要元素 N、O、Si、Na、Ca 和 Mg 的天然样品在薄锂靶上通过 30、35、40、50、60 和 70 MeV 质子在 7Li(p,n)7Be 反应产生的中子场中进行辐照。使用校准的 NE213 有机液体闪烁体通过飞行时间法测量中子产率。根据 HPGe 探测器测量的诱发活动，我们估计了 15 个横截面的激发函数。
Neutron activation cross sections between 30 and 70 MeV were measured by the activation method using a semi-monoenergetic neutron field settled at the AVF cyclotron of the Cyclotron and Radioisotope Center(CYRIC), Tohoku University. Natural samples of N, O, Si, Na, Ca and Mg which are the major elements of water, air and soil were irradiated in this neutron field generated through the 7Li(p,n)7Be reaction by 30, 35,40, 50,60 and 70 MeV protons on thin Li target. Neutron yields were measured with the time-of-flight method using a calibrated NE213 organic liquid scintillator. From the induced activities measured with the HPGe detectors, we estimated the excitation functions of 15 cross sections.