Evidence for the Exchange Effect Down to Very Low Energy in the Beta Decays of 63Ni and 241Pu

M. Loidl; C. Le-Bret; M. Rodrigues; X. Mougeot

Evidence for the Exchange Effect Down to Very Low Energy in the Beta Decays of 63Ni and 241Pu

M. Loidl ^{1, *} C. Le-Bret ¹ M. Rodrigues ¹ X. Mougeot ¹

* Corresponding author

1 LNHB - Laboratoire National Henri Becquerel

DM2I - Département Métrologie Instrumentation & Information : DRT/LIST/DM2I

Abstract : Metallic magnetic calorimeters have been used for several years for the determination of the shapes of beta spectra. Experimental spectra of the beta decays of 63Ni and 241Pu exhibit, at very low energy, strong deviations from standard theoretical calculations including corrections for screening, radiative, and nuclear size effects. These discrepancies can be attributed to the atomic exchange effect. In particular the spectrum of 63Ni measured with an electroplated 63Ni source is in excellent agreement with theory including the exchange effect. This underlines the quality of the experimental spectrum as well as the correctness of the calculation of the exchange effect.

Keywords : Exchange effect Metallic magnetic calorimeters Beta spectrometry

Document type :

Journal articles

Domain :

Physics [physics] / Nuclear Experiment [nucl-ex]

Engineering Sciences [physics] / Signal and Image processing

Complete list of metadatas

https://hal-cea.archives-ouvertes.fr/cea-01834215
Contributor : Marie-France Robbe <>
Submitted on : Tuesday, July 10, 2018 - 12:39:18 PM
Last modification on : Monday, May 13, 2019 - 11:16:00 AM

Evidence for the Exchange Effect Down to Very Low Energy in the Beta Decays of 63Ni and 241Pu

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Evidence for the Exchange Effect Down to Very Low Energy in the Beta Decays of 63Ni and 241Pu

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