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Publication  > 'Measurement of double beta decay of 100Mo to excited states in the NEMO 3 experiment'
Measurement of double beta decay of 100Mo to excited states in the NEMO 3 experiment

Author
Arnold Roger,  IPHC Strasbourg
Augier Corinne,  LAL Orsay
Vála Ladislav, Ing.Ph.D. IEAP
Jerie Jan, Ing. IEAP
Štekl Ivan, Doc. CSc. IEAP
Vorobel Vít, Ing. Ph.D. FMP Charles University
NEMO Collaboration ,  NEMO Collaboration

Year
2007

Scientific journal
Nucl. Phys. A 781 (2007) pp. 209-226


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 T1/2(2ν) = [5.7+1.3−0.9 (stat.) ± 0.8 (syst.)]×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 T1/2(0ν) (0+ → 0+1) > 8.9 ×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 T1/2(2ν) (0+ → 2+1) > 1.1 ×1021 y (at 90% C.L.) and for the neutrinoless T1/2(0ν) (0+ → 2+1) > 1.6 ×1023 y (at 90% C.L.).
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Cite article as:
R. Arnold, C. Augier, L. Vála, J. Jerie, I. Štekl, V. Vorobel, . NEMO Collaboration, "Measurement of double beta decay of 100Mo to excited states in the NEMO 3 experiment", Nucl. Phys. A 781 (2007) pp. 209-226 (2007)

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