The Korean Physical Society 06130 22, Teheran-ro 7-gil, Gangnam-gu, Seoul, Republic of Korea 610 Representation : Tae Won NOH TEL: 02-556-4737 FAX: 02-554-1643 E-mail : webmaster@kps.or.kr Copyright(C) KPS, All rights reserved.
30 May 2022 to 4 June 2022
Virtual Seoul
Asia/Seoul timezone

High energy resolution calorimetrically measured $^{193}$Pt electron capture spectrum

Not scheduled
20m
Virtual Seoul

Virtual Seoul

Poster Neutrino mass Poster

Description

The radionuclide $^{163}$Ho, undergoing electron capture, has optimum properties to be used in experiments for the determination of the neutrino mass scale. This stems from its very low value $Q$-value, $Q_{\mathrm{EC}}$ ~ 2.83 keV which is very close to the binding energy of the 3s electrons. $Q_{\mathrm{EC}}$ is the maximum energy available for atomic excitations (assuming massless neutrinos), hence electrons from the K and L shells cannot be captured. Only one other nuclide, undergoing electron capture to the nuclear ground state of the daughter nucleus, has a $Q_{\mathrm{EC}}$ value which does not allow for K-captures, namely $^{193}$Pt. A high energy resolution calorimetric measurement of the $^{193}$Pt electron capture spectrum is of major importance to test the models for the description of low energy electron capture processes. We present a $^{193}$Pt spectrum obtained with low temperature metallic magnetic calorimeters with $^{193}$Pt ion-implanted in gold absorbers. We discuss the obtained results in comparison with the available high energy resolution $^{163}$Ho electron capture spectra.

Primary authors

Loredana Gastaldo (Kirchhoff Institute for Physics, Heidelberg University, Germany ) Arnulf Barth (Kirchhoff Institute for Physics, Heidelberg University, Germany ) Prof. Christian Enss (Kirchhoff Institute for Physics, Heidelberg University, Germany ) Dr Andreas Fleischmann (Kirchhoff Institute for Physics, Heidelberg University, Germany ) Markus Griedel (Kirchhoff Institute for Physics, Heidelberg University, Germany ) Daniel Hengstler (Kirchhoff Institute for Physics, Heidelberg University, Germany ) Karl Johnston (ISOLDE, CERN, Geneva, Switzerland/France) Ulli Köster (Institut Laue-Langevin, Grenoble, France) Neven Kovac (Kirchhoff Institute for Physics, Heidelberg University, Germany ) Federica Mantegazzini (Kirchhoff Institute for Physics, Heidelberg University, Germany ) Ioana Alexandra Nitu (Kirchhoff Institute for Physics, Heidelberg University, Germany ) Tobias Schmitt (Kirchhoff Institute for Physics, Heidelberg University, Germany ) Daniel Unger (Kirchhoff Institute for Physics, Heidelberg University, Germany )

Presentation Materials