Counting 81Kr atoms for analysis of groundwater

Lehmann, B. E.; Oeschger, H.; Loosli, H. H.; Hurst, G. S.; Allman, S. L.; Chen, C. H.; Kramer, S. D.; Payne, M. G.; Phillips, R. C.; Willis, R. D.; Thonnard, N. (1985). Counting 81Kr atoms for analysis of groundwater. Journal of Geophysical Research: Solid Earth, 90(B13), pp. 11547-11551. American Geophysical Union 10.1029/JB090iB13p11547

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A new analytical technique with sufficient sensitivity to determine 81Kr concentrations in groundwater is described. The method utilizes single-atom counting by laser resonance ionization spectroscopy (RIS) in combination with a small mass spectrometer to achieve the required selectivity and sensitivity. A first demonstration of the technique for groundwater analyses is presented in which about 1000 atoms of 81Kr were counted after the processing of gas extracted from only a few liters of water. The potential of the new method for groundwater dating in the range 50,000 to 1,000,000 years is discussed.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Climate and Environmental Physics

UniBE Contributor:

Lehmann, Bernhard and Loosli, Heinz Hugo

Subjects:

500 Science > 530 Physics

ISSN:

2169-9356

Publisher:

American Geophysical Union

Language:

English

Submitter:

BORIS Import 2

Date Deposited:

30 Sep 2021 08:20

Last Modified:

30 Sep 2021 08:20

Publisher DOI:

10.1029/JB090iB13p11547

BORIS DOI:

10.48350/158711

URI:

https://boris.unibe.ch/id/eprint/158711

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