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30 May 2022 to 4 June 2022
Virtual Seoul
Asia/Seoul timezone

Influence of the Host Material on the Calorimetrically Measured $^7$Be Electron Capture Spectrum

Not scheduled
20m
Virtual Seoul

Virtual Seoul

Poster Neutrino mass Poster

Speaker

Mr Arnulf Barth (Kirchhoff Institute for Physics)

Description

In electron capture processes, an electron of the parent atom is captured by the nucleus and an electron neutrino is emitted, leaving the daughter atom in an excited state. Precise calculations of the atomic de-excitation processes can be performed for isolated atoms. In practice, radioactive decay occurs with the atom in a medium. We present the possibility to study effects the environment has on the $^7$Be electron capture spectrum. $^7$Be is the lightest nuclide to undergo electron capture, with a half-life of about 53 days and a $Q$-value of about 862 keV. For this study, $^7$Be is ion-implanted into the three host materials gold, silver, and aluminum, which are each deposited onto the absorbers of low temperature metallic magnetic calorimeters. Our goal is to investigate the half-life, L/K ratio, and the energy distribution of the nuclear recoil for different host materials. The measured spectra will be compared to spectra derived by \textit{ab initio} calculations. A deeper understanding of environment-induced effects on a decaying atom and a better model for nuclear recoils in a crystal will yield important results for experiments using $^{163}$Ho for the determination of the neutrino mass scale, for the detection of coherent neutrino-nucleus scattering, and for the direct detection of dark matter.

Collaboration ECHo Collaboration

Primary authors

Mr Arnulf Barth (Kirchhoff Institute for Physics) Prof. Christian Enss (Kirchhoff Institute for Physics, Heidelberg University) Dr Andreas Fleischmann (Kirchhoff Institute for Physics, Heidelberg University) Prof. Maurits Haverkort (Institute for Theoretical Physics, Heidelberg University) Dr Karl Johnston (ISOLDE, CERN) Dr Federica Mantegazzini (Kirchhoff Institute for Physics, Heidelberg University) Mr Marc Merstorf (Institute for Theoretical Physics, Heidelberg University) Dr Andreas Reifenberger (Kirchhoff Institute for Physics, Heidelberg University) Dr Peter Rubovič (Institute of Experimental and Applied Physics, Czech Technical University in Prague) Loredana Gastaldo (Kirchhoff Institute for Physics, Heidelberg University)

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