Authors:
F. PattiSPPS-Institut de Protection et de Sûreté Nucléaire-Commissariat à l'Energie Atomique Service de Protection Sanitaire-Département de Protection 92260 Fontenay aus Roses (France)

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P. BourgeonSPPS-Institut de Protection et de Sûreté Nucléaire-Commissariat à l'Energie Atomique Service de Protection Sanitaire-Département de Protection 92260 Fontenay aus Roses (France)

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Abstract  

The evolution of85Kr concentrations in the atmosphere has been followed in the Northern hemisphere (France) from June 1966 to February 1979 and in the Southern hemisphere from March 1968 to October 1977 (Tahiti and Terre Adélie). The growth observed during the years 1966–1968 (1.8 pCi·m−3 per year) in the Northern hemisphere did not continue in 1969, 1970, 1971, during which period a constant level at 14.8 pCi·m−3 per year and even a decrease (12.9 pCi·m−3 in 1971) were noticed; this was followed by a new increase of about 0.9 pCi·m−3 per year. In the Southern hemisphere, a regular groth from 1968 to 1974 (0.9 pCi·m−3 per year) was followed by values stabilized around 14.5 pCi·m−3. The curve illustrating the evolution of the Krypton specific activity in the Northern hemisphere from 1954 to February 1979 shows that this increased in a discontinuous way from 1 to 40 disintegrations per minute; nevertheless the present atmospheric activity is very low with a value of only 8·10−5 MPC.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)