Production of selected cosmogenic radionuclides by muons: 2. Capture of negative muons
Production of selected cosmogenic radionuclides by muons: 2. Capture of negative muons
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DOI：
10.1016/s0012-821x(02)00641-6
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发表时间：
2002-06
影响因子：
5.3
通讯作者：
B. Heisinger;D. Lal;A. Jull;P. Kubik;S. Ivy‐Ochs;K. Knie;E. Nolte
中科院分区：
文献类型：
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作者：
B. Heisinger;D. Lal;A. Jull;P. Kubik;S. Ivy‐Ochs;K. Knie;E. Nolte
我们已经确定了 Al2O3、SiO2、S、Ar、K2SO4、CaCO3、Fe、Ni 和 Cu 靶材中放射性核素的产量，这些靶材在维利根（瑞士）的 Paul Scherrer 研究所用慢负 μ 子进行辐照。通过测量μ子X射线来确定停止的负μ子的注量。长寿命和短寿命放射性核素的浓度分别用加速器质谱（AMS）和γ能谱测量。特别重点关注石英靶中产生的放射性核素 10Be、14C 和 26Al，Al2O3 和 S 靶中产生的 26Al，K2SO4 和 CaCO3 靶中产生的 36Cl，以及 Fe2O3 靶中产生的 53Mn。选择这些目标是因为它们也是典型岩石中宇宙射线相互作用的天然目标矿物。我们还提供了宇宙射线 μ−捕获后产生的放射性核素的深度相关生产率的计算结果，以及宇宙射线诱导的由核子成分、μ−捕获、快 μ 子和中子捕获产生的地质相关放射性核素的生产率。
We have determined the production yields for radionuclides in Al2O3, SiO2, S, Ar, K2SO4, CaCO3, Fe, Ni and Cu targets, which were irradiated with slow negative muons at the Paul Scherrer Institute in Villigen (Switzerland). The fluences of the stopped negative muons were determined by measuring the muonic X-rays. The concentrations of the long-lived and short-lived radionuclides were measured with accelerator mass spectrometry (AMS) and γ-spectroscopy, respectively. Special emphasis was put on the radionuclides10Be,14C and26Al produced in quartz targets,26Al in Al2O3and S targets,36Cl in K2SO4and CaCO3targets, and53Mn in Fe2O3targets. These targets were selected because they are also the naturally occurring target minerals for cosmic ray interactions in typical rocks. We also present results of calculations for depth-dependent production rates of radionuclides produced after cosmic ray μ−capture, as well as cosmic ray-induced production rates of geologically relevant radionuclides produced by the nucleonic component, by μ−capture, by fast muons and by neutron capture.