Investigation of Double Beta Decay of Ni-58 with the Obelix Spectrometer

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F17%3A00318847" target="_blank" >RIV/68407700:21670/17:00318847 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1063/1.5007645" target="_blank" >http://dx.doi.org/10.1063/1.5007645</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.5007645" target="_blank" >10.1063/1.5007645</a>

Result language
angličtina
Original language name
Investigation of Double Beta Decay of Ni-58 with the Obelix Spectrometer
Original language description
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.
Czech name
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Czech description
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Project
<a href="/en/project/EF16_013%2F0001733" target="_blank" >EF16_013/0001733: Underground laboratory LSM - Czech participation to European-level research</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Workshop on Calculation of Double-Beta-Decay Matrix Elements (MEDEX´17)
ISBN
978-0-7354-1577-5
ISSN
0094-243X
e-ISSN
—
Number of pages
4
Pages from-to
—
Publisher name
AIP Conference Proceedings
Place of publication
New York
Event location
Praha
Event date
May 29, 2017
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000417388100020

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