81Kr and 85Kr in groundwater, milk river aquifer, Alberta, Canada

Lehmann, B.E.; Loosli, H.H.; Rauber, D.; Thonnard, N.; Willis, R.D. (1991). 81Kr and 85Kr in groundwater, milk river aquifer, Alberta, Canada. Applied geochemistry, 6(4), pp. 419-423. Pergamon 10.1016/0883-2927(91)90041-M

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The85Kr activity of well No. 9 is (2.1 ± 0.3) mBq/cm3 STP ofKr or ≈0.3% of the modern atmospheric activity indicating that no young water component is present in this groundwater and that no contamination occurred in extracting a Kr gas sample for81Kr analysis.

The81Kr concentration was measured by laser resonance ionization spectroscopy to be 82 ± 18% of the modern atmospheric concentration. Only 5000 atoms of81Kr were used in the final analytical step which represent ≈7% of the initial number present in a water sample of 50 1. An upper limit of 140 ka is calculated for the age of the water from a simple81Kr decay model. Of key importance for the future use of a81Kr dating technique is the conclusion that subsurface production of81Kr appears to be unimportant.

Item Type:	Journal Article (Original Article)
Division/Institute:	08 Faculty of Science > Physics Institute > Climate and Environmental Physics
UniBE Contributor:	Lehmann, Bernhard, Loosli, Heinz Hugo
Subjects:	500 Science > 530 Physics
ISSN:	0883-2927
Publisher:	Pergamon
Language:	English
Submitter:	BORIS Import 2
Date Deposited:	15 Sep 2021 09:58
Last Modified:	05 Dec 2022 15:52
Publisher DOI:	10.1016/0883-2927(91)90041-M
URI:	https://boris.unibe.ch/id/eprint/158561