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Measurement of the cosmogenic activation of germanium detectors in EDELWEISS-III

Abstract:
We present a measurement of the cosmogenic activation in the cryogenic germanium detectors of the EDELWEISS III direct dark matter search experiment. The decay rates measured in detectors with different exposures to cosmic rays above ground are converted into production rates of different isotopes. The measured production rates in units of nuclei/kg/day are 82 ± 21 for 3H, 2.8 ± 0.6 for 49V, 4.6 ± 0.7 for 55Fe, and 106 ± 13 for 65Zn. These results are the most accurate for these isotopes. A 90% C.L. lower limit on the production rate of 68Ge of 71 nuclei/kg/day is also presented. They are compared to model predictions present in literature and to estimates calculated with the ACTIVIA code.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1016/j.astropartphys.2017.03.006

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Institution:
University of Oxford
Oxford college:
Corpus Christi College
Role:
Author



Publisher:
Elsevier
Journal:
Astroparticle Physics More from this journal
Volume:
91
Pages:
51-64
Publication date:
2017-03-27
Acceptance date:
2017-03-24
DOI:
ISSN:
0927-6505


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Pubs id:
pubs:687167
UUID:
uuid:4a0122ad-9993-4d18-9366-79c9f7ddc67a
Local pid:
pubs:687167
Source identifiers:
687167
Deposit date:
2017-03-27

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