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Search for rare alpha and double beta decays of Yb isotopes to excited levels of daughter nuclei
- Source :
- European Physical Journal C: Particles and Fields, Vol 82, Iss 1, Pp 1-7 (2022)
- Publication Year :
- 2022
- Publisher :
- SpringerOpen, 2022.
-
Abstract
- Abstract A search for alpha and double beta decays of ytterbium isotopes was performed with an ultra low-background high purity germanium detector at Gran Sasso Underground Laboratory (Italy). A 194.7 g Yb $$_2$$ 2 (C $$_2$$ 2 O $$_4$$ 4 ) $$_3$$ 3 powder sample was measured for 11.3 days with a total Yb exposure of 1.25 kg $$\times $$ × day. Half-life limits for $$\alpha $$ α -decay modes of $$^{168}\mathrm Yb$$ 168 Y b , $$^{170}\mathrm Yb$$ 170 Y b , $$^{171}\mathrm Yb$$ 171 Y b , $$^{172}\mathrm Yb$$ 172 Y b , $$^{173}\mathrm Yb$$ 173 Y b , $$^{174}\mathrm Yb$$ 174 Y b and $$^{176}\mathrm Yb$$ 176 Y b into the first excited states have been obtained between $$6\times 10^{14}$$ 6 × 10 14 years and $$2\times 10^{16}$$ 2 × 10 16 years. These are the first experimental constraints of these decay modes. Double electron capture of $$^{168}\mathrm Yb$$ 168 Y b and double beta decay of $$^{176}\mathrm Yb$$ 176 Y b into the first excited 2 $$^+$$ + and 0 $$^+$$ + states could be excluded with limits between $$1\times 10^{14}$$ 1 × 10 14 years to $$8\times 10^{16}$$ 8 × 10 16 years. This improves the experimental information on some of the decay modes compared to previous constraints.
Details
- Language :
- English
- ISSN :
- 14346044 and 14346052
- Volume :
- 82
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- European Physical Journal C: Particles and Fields
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.8061083abe3468c837fed7d281d7340
- Document Type :
- article
- Full Text :
- https://doi.org/10.1140/epjc/s10052-021-09926-8