Journal
NUCLEAR PHYSICS A
Volume 847, Issue 3-4, Pages 168-179Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysa.2010.07.009
Keywords
RADIOACTIVITY Zr-96(2 beta); measured E-beta,E- E-gamma, beta beta-, beta gamma-coin; deduced T-1/2 for 2 nu beta beta-decay, NEMO-3 detector
Categories
Funding
- Czech Republic
- RFBR (Russia)
- STFC (UK)
- NSF (USA)
- STFC [SuperNEMO, ST/G008914/1, ST/H000607/1, ST/H001166/1, ST/H000577/1, PP/E000037/1, ST/H003975/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H001166/1, SuperNEMO, PP/E000037/1, ST/H003975/1, ST/H000577/1 SuperNEMO, ST/G008914/1, ST/H000607/1, ST/H000577/1, ST/H000607/1 SuperNEMO] Funding Source: researchfish
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Using 9.4 g of Zr-96 isotope and 1221 days of data from the NEMO-3 detector corresponding (0 0.031 kg y, the obtained 2 nu beta beta decay half-life measurement is T-1/2(2 nu) = [2.35 +/- 0.14(stat) +/- 0.16(syst)] x 10(19) yr. Different characteristics of the final state electrons have been studied, such as the energy sum, individual electron energy, and angular distribution. The 2v nuclear matrix element is extracted using the measured 2 nu beta beta half-life and is M-2 nu = 0.049 +/- 0.002. Constraints on 0 nu beta beta decay have also been set. (C) 2010 Elsevier B.V. All rights reserved.
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