Double Beta Decay of $^{100}$Mo to Excited Final States

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dc.creatorHornish, M. J.
dc.creatorDe Braeckeleer, L.
dc.creatorBarabash, A. S.
dc.creatorUmatov, V. I.
dc.date2005-12-20
dc.date.accessioned2026-07-07T06:56:01Z
dc.date.available2026-07-07T06:56:01Z
dc.descriptionA systematic study of the inclusive ($0ν+2ν$) double beta ($ββ$) decay of $^{100}$Mo to various excited final states of $^{100}$Ru was performed. Utilizing two large HPGe detectors operated in coincidence, a search for the subsequent deexcitation gamma-gamma cascades was conducted. A 1.05-kg sample of isotopically enriched (98.4%) $^{100}$Mo was investigated for 455 days, yielding an unambiguous observation of the double beta decay of $^{100}$Mo to the $0_1^+$ state (1130.3 keV) of $^{100}$Ru. This excited final state decays via the $0_1^+ \to 2_1^+ \to 0_{gs}^+$ sequence (with $E_{\gamma1}$ = 590.8 keV and $E_{\gamma2}$ = 539.5 keV), and 22 such coincidence events were detected, with a continuous background estimated to be 2.5 events. This counting rate corresponds to a decay half-life for the $ββ($0^+ rightarrow 0_1^+)$ transition of $T_{1/2}^{(0ν+2ν)} = [ 6.0^{+1.9}_{-1.1} (\rm{stat}) \pm 0.6(\rm{syst})] \times 10^{20}$ years. Lower limits on decay half-lives were achieved for higher excited final states.
dc.description10 pages, 8 figures, submitted to Physical Review C
dc.identifierhttps://arxiv.org/abs/nucl-ex/0512030
dc.identifierhttp://arxiv.org/abs/nucl-ex/0512030
dc.identifierPhys.Rev. C74 (2006) 044314
dc.identifierdoi:10.1103/PhysRevC.74.044314
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/106476
dc.subjectNuclear Experiment
dc.titleDouble Beta Decay of $^{100}$Mo to Excited Final States
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