Investigation of Double Beta Decay of Ni-58 with the Obelix Spectrometer
- NázevTitle
- Investigation of Double Beta Decay of Ni-58 with the Obelix SpectrometerInvestigation of Double Beta Decay of Ni-58 with the Obelix Spectrometer
- Druh výsledkuResult type
- Příspěvek ve sborníkuProceedings paper
- AutořiAuthors
- V. B. Brudanin, A. A. Klimenko, F. Piquemal, E. Rukhadze, I. Štekl
- Klíčová slovaKeywords
- TABLES, double beta decay, 58Ni, spectrometer OBELIX
- KonferenceConference
- Matrix Elements for the Double-beta-decay EXperiments (Prague, Czechia, 2017-05-29)
- DOIDOI
- 10.1063/1.5007645
- Časopis / citaceJournal / citation
- In: AIP Conference Proceedings 1892, Author(s), 2017, pp. 020020 · ISSN 0094-243X
- RokYear
- 2017
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- Podzemní laboratoř LSM - česká účast ve výzkumné infrastruktuře evropského významuUnderground laboratory LSM - Czech participation to European-level research infrastructure
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
Investigation of double beta decay processes (beta(+) EC, EC/EC) of Ni-58 was performed at the Modane underground laboratory (LSM, France, 4800 m w.e.) using ultra low-background HPGe detector Obelix with sensitive volume of 600 cm(3) and a sample of natural nickel, containing similar to 68% of Ni-58 with a mass of similar to 21.7 kg. New experimental limits on 2 nu beta(+) EC decay of Ni-58 to the ground 0(+) and 2(1)(+), 811 keV excited state of Fe-58, and 2 nu EC/EC decay of Ni-58 to 2(1)(+), 811 keV and 2(2)(+), 1 675 keV excited states of Fe-58 were obtained from the preliminary calculation of experimental data accumulated in similar to 88d. They are -T-1/2(beta(+) EC, 0(+) -> 0(+)) > 1.4 x10(21) y; T-1/2 (beta(+) EC, 0(+) -> 2(1)(+) > 1.7 x10(22) y, T-1/2 (EC/EC, 0(+) -> 2(1)(+)) > 2.4 x10(22) y, T-1/2 (EC/EC, 0(+) -> 2(2)(+)) > 2.1 x 10(22) y. For resonant neutrino-less radiative EC/EC decay with energy of 1 918.3 keV a new experimental limit of T-1/2 (0.EC/EC - res, 1918keV) > 4.7 x10(22) y was also obtained. All limits are at 90 % CL.
Investigation of double beta decay processes (beta(+) EC, EC/EC) of Ni-58 was performed at the Modane underground laboratory (LSM, France, 4800 m w.e.) using ultra low-background HPGe detector Obelix with sensitive volume of 600 cm(3) and a sample of natural nickel, containing similar to 68% of Ni-58 with a mass of similar to 21.7 kg. New experimental limits on 2 nu beta(+) EC decay of Ni-58 to the ground 0(+) and 2(1)(+), 811 keV excited state of Fe-58, and 2 nu EC/EC decay of Ni-58 to 2(1)(+), 811 keV and 2(2)(+), 1 675 keV excited states of Fe-58 were obtained from the preliminary calculation of experimental data accumulated in similar to 88d. They are -T-1/2(beta(+) EC, 0(+) -> 0(+)) > 1.4 x10(21) y; T-1/2 (beta(+) EC, 0(+) -> 2(1)(+) > 1.7 x10(22) y, T-1/2 (EC/EC, 0(+) -> 2(1)(+)) > 2.4 x10(22) y, T-1/2 (EC/EC, 0(+) -> 2(2)(+)) > 2.1 x 10(22) y. For resonant neutrino-less radiative EC/EC decay with energy of 1 918.3 keV a new experimental limit of T-1/2 (0.EC/EC - res, 1918keV) > 4.7 x10(22) y was also obtained. All limits are at 90 % CL.