与239 + 240Pu、241Am和137Cs相比，全球武器试验沉降物237Np在草原土壤中的停留时间。

Residence times of global weapons testing fallout 237Np in a grassland soil compared to 239 + 240Pu, 241Am, and 137Cs.

作者信息

Bunzl K, Kofuji H, Schimmack W, Tsumura A, Ueno K, Yamamoto M

机构信息

GSF-Forschungszentrum für Umwelt und Gesundheit, Institut für Strahlenschutz, Neuherberg, Oberschleissheim, F.R. Germany.

出版信息

Health Phys. 1995 Jan;68(1):89-93. doi: 10.1097/00004032-199501000-00011.

DOI:10.1097/00004032-199501000-00011

PMID:7989200

Abstract

The vertical distribution of weapons testing fallout 237Np has been determined in an undisturbed grassland soil (Alfisol). By using a compartmental model for multi-layered soils, the mean residence half-times of 237Np in each soil layer were calculated and compared with results on weapons fallout 239 + 240Pu, 241Am and 137Cs in the same soil. The results show that the mobility of 237Np was in most soil horizons either equal or slightly enhanced as compared to that of Pu, Am, and radiocesium.

摘要

已测定了未受干扰的草地土壤（淋溶土）中武器试验沉降物237Np的垂直分布。通过使用多层土壤的分区模型，计算了237Np在各土壤层中的平均停留半衰期，并与同一土壤中武器沉降物239 + 240Pu、241Am和137Cs的结果进行了比较。结果表明，与钚、镅和放射性铯相比，237Np在大多数土壤层中的迁移性相同或略有增强。