Homogeneity of neutron flux during irradiation for 40Ar/39Ar age dating in the research reactor at Kyoto University.
Homogeneity of neutron flux during irradiation for 40Ar/39Ar age dating in the research reactor at Kyoto University.
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京都大学研究堆中 40Ar/39Ar 年龄测定过程中中子通量的均匀性。
DOI：
10.2465/ganko.94.329
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
T. Matsuda
中科院分区：
文献类型：
--
作者：
H. Hyodo;S. Kim;T. Itaya;T. Matsuda
在京都大学研究堆研究所进行的辐照实验中，中子通量的均匀性进行了评估，使用J值收集的40 Ar/39 Ar年龄测定。对直径约0.3 mm的单个矿物颗粒（Hb 3 gr角闪石）的激光熔融结果表明，在圆柱形样品保持器尺寸（φ16×18）范围内，水平和垂直方向的J值变化不大。反应堆似乎有一个相对均匀的快中子密度分布范围内的尺寸为40 Ar/39 Ar定年。对钾盐和钙盐的校正因子也作了评述。Hb 3gr的J值受这些因素的影响较小，因为干扰同位素的贡献很小。
Homogeneity of neutron fluxes during irradiation experiments done in Research Reactor Institute, Kyoto University, was evaluated using J-values collected in 40Ar/39Ar age determinations. The laser fusion results of approximately 0.3 mm-size individual mineral grains (Hb3gr hornblendes) indicate insignificant change in J-values both in horizontal and vertical directions within a size of the cylindrical sample holder (φ16×18). The reactor seems to have a relatively uniform fast neutron density distribution within the dimensions for 40Ar/39Ar dating. Correction factors obtained from potassium and calcium salts were also reviewed. The J-values of Hb3gr have minor effects from these factors because of little contribution of the interfering isotopes.