PoS - Proceedings of Science
Volume 380 - Particles and Nuclei International Conference 2021 (PANIC2021) - Nuclear and particle astrophysics
New observation of α decay of $^{190}Pt$ to the first excited level of $^{186}Os$
M. Romaniuk*, F. Danevich, M. Hult, A. Junghans, D. Kasperovich, B. Kropivyansky, G. Lutter, G. Marissens, O. Polischuk, H. Stroh, S. Tessalina, V. Tretyak and B. Ware
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Pre-published on: March 07, 2022
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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 $T_{1/2}= [2.28 _{-0.16}^{+0.19} (stat.)\pm 0.9(syst.)] \times 10^{14}$ yr.
DOI: https://doi.org/10.22323/1.380.0328
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