Measurement of the long-lived radionuclide Kr-81 in pre-nuclear and present-day atmospheric krypton

Authors
Collon, P Cole, D Davids, B Fauerbach, M Harkewicz, R Kutschera, W Morrissey, DJ Pardo, RC Paul, M Sherrill, BM Steiner, M
Citation
P. Collon et al., Measurement of the long-lived radionuclide Kr-81 in pre-nuclear and present-day atmospheric krypton, RADIOCH ACT, 85(1-2), 1999, pp. 13-19
Citations number
20
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
RADIOCHIMICA ACTA
ISSN journal
00338230 → ACNP
Volume
85
Issue
1-2
Year of publication
1999
Pages
13 - 19
Database
ISI
SICI code
0033-8230(1999)85:1-2<13:MOTLRK>2.0.ZU;2-9
Abstract
Isotopic ratios of Kr-81/Kr in the range of 10(-13) were measured with acce lerator mass spectrometry in pre-nuclear atmospheric krypton and in modem k rypton. Within the experimental uncertainty (+/-30%) the Kr-81/Kr ratios we re found to be the same. This establishes Kr-81 (t(1/2) = 230000 years) as a long-lived cosmogenic radionuclide essentially unaffected by anthropogeni c contributions, and therefore well suited for dating applications. The ant hropogenic "cleanliness" of Kr-81 is in accord with estimates for contribut ions from various human activities.