Investigation of double beta decay of 58Ni at the Modane Underground Laboratory
- NázevTitle
- Investigation of double beta decay of 58Ni at the Modane Underground LaboratoryInvestigation of double beta decay of 58Ni at the Modane Underground Laboratory
- Druh výsledkuResult type
- Článek v časopiseJournal article
- AutořiAuthors
- E. Rukhadze, V.B. Brudanin, A.A. Klimenko, F. Piquemal, N.I. Rukhadze, Yu. Shitov, I. Štekl, G. Warot
- Klíčová slovaKeywords
- double beta decay
- KonferenceConference
- 15th International Conference on Topics in Astroparticle and Underground Physics (Sudbury, Canada, 2017-07-24)
- DOIDOI
- 10.1088/1742-6596/1342/1/012041
- Časopis / citaceJournal / citation
- Journal of Physics: Conference Series 1342(1), 012041 (2020) · ISSN 1742-6588
- RokYear
- 2020
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- LSM-CZ II - Podzemní laboratoř LSM - účast České republiky - LM2018107 (2020–2022)LSM-CZ II - Podzemní laboratoř LSM - účast České republiky - LM2018107 (2020–2022); Podzemní laboratoř LSM - česká účast ve výzkumné infrastruktuře evropského významuUnderground laboratory LSM - Czech participation to European-level research infrastructure
- CitovánoCited by
- 1 (INSPIRE-HEP)
- Plný text (open access)Full text (open access)
- https://iopscience.iop.org/article/10.1088/1742-6596/1342/1/012041/pdf
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
Investigation of double beta decay processes (β+EC, EC/EC) of 58Ni was performed at the Modane underground laboratory (LSM, France, 4800 m w.e.). A sample of natural nickel, containing ~68% of 58Ni and a mass of ~21.7 kg, was measured using ultra low-background HPGe detector Obelix (sensitive volume of 600 cm^3) during ~143.8 days. New experimental limits on 2νβ+EC decay of 58Ni to the ground 0+ and 2^+_(1), 811 keV excited state of 58Fe, and 2νEC/EC decay of 58Ni to 2^+_(1), 811 keV and 2^+_(2), 1 675 keV excited states of 58Fe were obtained in this measurement. There are -T1/2(β+EC, 0+ → 0+) > 1.7 × 10^22 y ;T1/2(β+EC, 0+ → 2+_(1)) > 2.3 × 10^22 y, T1/2(EC/EC, 0+ → 2+_(1)) > 3.3 × 10^22 y, T1/2(EC/EC, 0+ → 2+_(2)) > 3.4 × 10^22 y. For resonant neutrino-less radiative EC/EC decay with energy of 1 918.3 keV a new experimental limit of T1/2 (0νEC/EC – res, 1918KeV) > 4.1 ×10^22 y was also obtained. All limits are at 90 % CL.
Investigation of double beta decay processes (β+EC, EC/EC) of 58Ni was performed at the Modane underground laboratory (LSM, France, 4800 m w.e.). A sample of natural nickel, containing ~68% of 58Ni and a mass of ~21.7 kg, was measured using ultra low-background HPGe detector Obelix (sensitive volume of 600 cm^3) during ~143.8 days. New experimental limits on 2νβ+EC decay of 58Ni to the ground 0+ and 2^+_(1), 811 keV excited state of 58Fe, and 2νEC/EC decay of 58Ni to 2^+_(1), 811 keV and 2^+_(2), 1 675 keV excited states of 58Fe were obtained in this measurement. There are -T1/2(β+EC, 0+ → 0+) > 1.7 × 10^22 y ;T1/2(β+EC, 0+ → 2+_(1)) > 2.3 × 10^22 y, T1/2(EC/EC, 0+ → 2+_(1)) > 3.3 × 10^22 y, T1/2(EC/EC, 0+ → 2+_(2)) > 3.4 × 10^22 y. For resonant neutrino-less radiative EC/EC decay with energy of 1 918.3 keV a new experimental limit of T1/2 (0νEC/EC – res, 1918KeV) > 4.1 ×10^22 y was also obtained. All limits are at 90 % CL.