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

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

EDELWEISS

Collaboration

•

E. Armengaud
(
- IRFU, Saclay
)

Jul 15, 2016

14 pages

Published in:

Astropart.Phys. 91 (2017) 51-64

Published: May, 2017

e-Print:

1607.04560 [astro-ph.CO]

DOI:

10.1016/j.astropartphys.2017.03.006

Experiments:

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Abstract: (Elsevier)

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 3 H, 2.8 ± 0.6 for 49 V, 4.6 ± 0.7 for 55 Fe, and 106 ± 13 for 65 Zn. These results are the most accurate for these isotopes. A 90% C.L. lower limit on the production rate of 68 Ge 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.

Germanium detector
Cosmogenic activation
Dark matter detection
detector: cryogenics
germanium: detector
decay rate: measured
nucleus
cosmic radiation
dark matter: direct detection
EDELWEISS

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