Regular Article - Experimental Physics
New limits on double-beta decay of Pt and Pt
Institute for Nuclear Research of NASU, 03028, Kyiv, Ukraine
2 European Commission, Joint Research Centre, Retieseweg 111, 2440, Geel, Belgium
3 Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328, Dresden, Germany
4 Department of Environmental Engineering, Technical University of Denmark, DTU Risø Campus, 4000, Roskilde, Denmark
5 John de Laeter Centre for Isotope Research, GPO Box U 1987, Curtin University, Bentley, WA, Australia
Accepted: 4 January 2022
Published online: 11 January 2022
A search for double-beta decay of Pt and Pt with emission of -ray quanta was realized at the HADES underground laboratory with a 148 g platinum sample measured by two ultralow-background HPGe detectors over 8946 h. The isotopic composition of the platinum sample has been measured with high precision using inductively coupled plasma mass spectrometry. New lower limits for the half-lives of Pt relative to different channels and modes of the decays were set on the level of – year. A possible exact resonant transition to the 1,2 1326.9 keV level of Os is limited for the first time as year. A new lower limit on the double-beta decay of Pt to the first excited level of Hg was set as year, one order of magnitude higher than the limit obtained in the previous experiment.
© The Author(s) 2022
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