Speaker
Dr
Mariia Romaniuk
(Institute for Nuclear Research of NASU)
Description
The partial half-life of $^{190}Pt$ for the alpha decay to the first excited level ($E_{exc}=137.2$ keV) of $^{186}Os$ was measured using an ultralow-background HPGe-detector system located 225 m underground in the laboratory HADES (Belgium). A sample of high purity platinum (the purity grade is 99.95%) with a mass of 148.122 g was used and measured during 373 days. Preliminary, the partial half-life of $^{190}Pt$ is estimated as $T_{1/2}=(2.2\pm0.4)\times10^{14}$ yr. Measurements of the $^{190}Pt$ isotopic concentration in the platinum sample are in progress at the John de Laeter Centre at Curtin University (Perth, Western Australia) aiming to further reduce the half-life value uncertainty.
Primary authors
Dr
Mariia Romaniuk
(Institute for Nuclear Research of NASU)
F. A. Danevich
(Institute for Nuclear Research of NASU)
M. Hult
(European Commission, JRC-Geel)
D. V. Kasperovych
(Institute for Nuclear Research of NASU)
G. Lutter
(Department of Environmental Engineering, Technical University of Denmark)
G. Marissens
(European Commission, JRC-Geel)
O. G. Polischuk
(Institute for Nuclear Research of NASU)
H. Stroh
(European Commission, JRC-Geel)
S. Tessalina
(John de Laeter Centre for Isotope Research)
V. I. Tretyak
(Institute for Nuclear Research of NASU)
