Recent results of the IGEX Ge-76 double-beta decay experiment

Aalseth, C.E.; Avignone, F.T.; Brodzinski, R.L.; Hensley, W.K.; Miley, H.S.; Reeves, J.H.; Kirpichnikov, I.V.; Starostin, A.S.; Vasenko, A.A.; Klimenko, A.A.

doi:10.1134/1.855774

Recent results of the IGEX Ge-76 double-beta decay experiment

2000

4 pages

Published in:

Phys.Atom.Nucl. 63 (2000) 1225-1228,
Yad.Fiz. 63 (2000) 1299-1302

DOI:

10.1134/1.855774

Experiments:

ITEP-912

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Abstract: (Springer)

The International Germanium Experiment (IGEX) has now analyzed 117 mol yr of data from its isotopically enriched (86% 76Ge) germanium detectors. Applying pulse shape discrimination (PSD) to the more recent data, the lower bound on the half-life for neutrinoless double-beta decay of 76Ge is deduced: T 1/2(0ν)>1.57×1025 yr (90% C.L.). This corresponds to an upper bound on the Majorana neutrino mass parameter, 〈m ν〉, between 0.33 eV and 1.35 eV depending on the choice of theoretical nuclear matrix elements used in the analysis.

talk: Dubna 1999/06/28
double-beta decay: (0neutrino)
germanium: lifetime
lower limit
neutrino: Majorana
neutrino: mass
energy spectrum
experimental results

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