RESIDENCE TIMES OF GLOBAL WEAPONS TESTING FALLOUT NP-237 IN A GRASSLAND SOIL COMPARED TO PU-259-241, AND CS-137(240, AM)

Authors
BUNZL K KOFUJI H SCHIMMACK W TSUMURA A UENO K YAMAMOTO M
Citation
K. Bunzl et al., RESIDENCE TIMES OF GLOBAL WEAPONS TESTING FALLOUT NP-237 IN A GRASSLAND SOIL COMPARED TO PU-259-241, AND CS-137(240, AM), Health physics, 68(1), 1995, pp. 89-93
Citations number
26
Categorie Soggetti
Radiology,Nuclear Medicine & Medical Imaging
Journal title
Health physics → ACNP
ISSN journal
00179078
Volume
68
Issue
1
Year of publication
1995
Pages
89 - 93
Database
ISI
SICI code
0017-9078(1995)68:1<89:RTOGWT>2.0.ZU;2-5
Abstract
The vertical distribution of weapons testing fallout Np-237 has been d etermined in an undisturbed grassland soil (Alfisol). By using a compa rtmental model for multi-layered soils, the mean residence half-times of Np-237 in each soil layer were calculated and compared with results on weapons fallout Pu-239+240, Am-241 and Cs-137 in the same soil. Th e results show that the mobility of Np-237 was in most soil horizons e ither equal or slightly enhanced as compared to that of Pu, Am, and ra diocesium.