Arnold, R;
Augier, C;
Baker, J;
Barabash, AS;
Bongrand, M;
Broudin, G;
Brudanin, V;
... Vylov, T; + view all
(2007)
Measurement of double beta decay of ¹⁰⁰Mo to excited states in the NEMO 3 experiment.
Nuclear Physics A
, 781
(1-2)
pp. 209-226.
10.1016/j.nuclphysa.2006.09.021.
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Abstract
The double beta decay of ¹⁰⁰Mo to the 0_{1}^{+} and 2_{1}^{+} excited states of ¹⁰⁰Ru is studied using the NEMO 3 data. After the analysis of 8024 h of data the half-life for the two-neutrino double beta decay of ¹⁰⁰Mo to the excited 0_{1}^{+} state is measured to be T_{1/2}^{2v} = [5.7_{-0.9}^{+1.3} (stat.) ± 0.8 (syst.)] x 10²⁰ y. The signal-to-background ratio is equal to 3. Information about energy and angular distributions of emitted electrons is also obtained. No evidence for neutrinoless double beta decay to the excited 0_{1}^{+} state has been found. The corresponding half-life limit is T_{1/2}^{0v} (0⁺→0_{1}^{+}) > 8.9 x 10²² y (at 90% C.L.). The search for the double beta decay to the 2_{1}^{+} excited state has allowed the determination of limits on the half-life for the two neutrino mode T_{1/2}^{0v} (0⁺→2_{1}^{+}) > 1.1 x 10²¹ y (at 90% C.L.) and for the neutrinoless mode T_{1/2}^{0v} (0⁺→2_{1}^{+}) > 1.6 x 10²³ y (at 90% C.L.).
| Type: | Article |
|---|---|
| Title: | Measurement of double beta decay of ¹⁰⁰Mo to excited states in the NEMO 3 experiment |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.nuclphysa.2006.09.021 |
| Publisher version: | http://doi.org/10.1016/j.nuclphysa.2006.09.021 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Double beta decay, Neutrino, ¹⁰⁰Mo, Excited state |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10091 |
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