JLow Temp Phys https://doi.org/10.1007/s10909-018-1984-2 First Calorimetric Measurement of Electron Capture in Pt with a Transition-Edge Sensor 1,2 2 1 K. E. Koehler · M. A. Famiano · C. J. Fontes · 2 1 3 T. W. Gorczyca · M. W. Rabin · D. R. Schmidt · 3 1 J. N. Ullom · M. P. Croce Received: 11 October 2017 / Accepted: 23 May 2018 © Springer Science+Business Media, LLC, part of Springer Nature 2018 Abstract The neutrino mass can be extracted from a high statistics, high resolution calorimetric spectrum of electron capture in Ho. In order to better understand the shape of the calorimetric electron capture spectrum, a second isotope was measured with a close to ideal absorber-source conﬁguration. Pt was created by irradiating a Pt-enriched platinum foil in a nuclear reactor. This Pt-in-Pt absorber was designed to have a nearly ideal absorber-source conﬁguration. The measured Pt calorimet- ric electron capture spectrum provides an independent check on the corresponding theoretical calculations, which have thus far been compared only for Ho. The ﬁrst experimental and theoretically calculated spectra from this Pt-in-Pt absorber are presented and overlaid for preliminary comparison of theory with experiment. Keywords Neutrino mass · Electron capture ·
Journal of Low Temperature Physics – Springer Journals
Published: Jun 1, 2018
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