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Distributions of Nuclear Reaction Products in Natural Substances

天然物质中核反应产物的分布

基本信息

批准号：
62470036
负责人：
HONDA Masatake
金额：
$ 0.45万
依托单位：
Nihon University, College of Humanities and Sciences
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1988
项目状态：
已结题

项目摘要

1. Determinations for cosmogenic ^<10>Be, ^<14>C and ^<26>Al have been performed by AMS methods in natural products, espceially in meteorites.2. Separation and purification of metal phases in chondrites have been developed extensively, and the contents of ^<10>Be and ^<26>Al in metals and those in silicates can be compared directly.3. By neutron activation methods, cosmogenic ^<45>Sc in iron meterorites has been determined. As for ^<107>Ag the project is still on the way. The determination for ^<53>Mn has not been started yet.4. Compiling above results along with other data, a comprehensive survey on cosmogenic products in meteorites became available. A systematic study on the production rates of spallation products was extended in terms of mass losses, delta A, and effective delta A.

1.利用<10><14><26>加速器质谱法对天然产物，特别是陨石中的宇宙成因^ Be、^ C和^ Al进行了测定。2.辉长岩中金属相的分离提纯得到了广泛的发展，可以<10><26>直接比较金属相和硅酸盐相中^ Be和^ Al的含量.用中子活化法测定了<45>铁陨石中宇宙成因的钪。至于^<107>Ag，该项目仍在进行中。尚未开始测定^<53>Mn。将上述结果沿着其他资料综合起来，就可以对陨石中的宇宙成因产物进行全面的调查。从质量损失、Δ A和有效Δ A的角度对sporphin产品的生产速率进行了系统的研究。