Interdis ciplinary study on isotopic geochemistry and particle physics

从月球表面物质、火星陨石、富气陨石、长宇宙射线暴露年龄的石质陨石、石铁陨石和Oklo天然反应堆样品的同位素结果中发现了不同环境条件下不同类型的中子俘获反应。中子捕获反应的定量表征是通过单个样品中^<150> Sm/^<149> Sm,^<156> Gd/^<155> Gd，和^<158> Gd/^<157> Gd的同位素位移来完成的，因为^<149> Sm,^<155> Gd和^<157> Gd的大中子捕获截面。

The variable types of neutron capture reactions under the variable environmental conditions were found from the isotopic results of lunar surface materials, martian meteorites, gas-rich meteorites, stony meteorites having long cosmic-ray exposure ages, stony-iron meteorites, and the Oklo natural reactor samples. The quantitative characterization of the neutron capture reactions were performed from the isotopic shifts of^<150> Sm/^<149> Sm,^<156> Gd/^<155> Gd, and^<158> Gd/^<157> Gd in individual samples because of the large neutron capture cross sections of^<149> Sm,^<155> Gd and^<157> Gd.