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Journal Articles Applied Radiation and Isotopes Year : 2018

Measurement of the electron capture probabilities of 55Fe with a metallic magnetic calorimeter

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Abstract

The ratios of the electron capture probabilities P-K, P-L and P-M of Fe-55 have been measured with a metallic magnetic calorimeter, a specific type of cryogenic detector. The Fe-55 source was enclosed in the detector absorber, whose dimensions were chosen such that the detection efficiency for Mn K X-rays was larger than 99.99%. Since all electrons and photons emitted by the source are absorbed in the detector, the detection efficiency is virtually 100% for K, L and M captures. The energy threshold was low enough to allow for clear separation of the M captures (similar to 80 eV) from noise. The capture probability ratios were translated to capture probabilities using the recommended value for the probability of the undetected N captures. The resulting values are in agreement both with the recommended values of P-K, P-L and P-M and with the experimental data of Pengra and coworkers.
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cea-01803818 , version 1 (31-05-2018)

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Martin Loidl, Matias Rodrigues, Riham Mariam. Measurement of the electron capture probabilities of 55Fe with a metallic magnetic calorimeter. Applied Radiation and Isotopes, 2018, 134 (SI), pp.395-398. ⟨10.1016/j.apradiso.2017.10.042⟩. ⟨cea-01803818⟩
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