Energy available for the double beta decay of 82Se

Nxumalo, Jochonia; Hykawy, J.G.; Unger, P.P.; Lander, C.A.; Barber, Robert C.; Sharma, K. S.; Duckworth, Henry E.

doi:10.1016/0370-2693(93)90627-t

Cited by 3 publications

(3 citation statements)

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“…Averaging again the two QRPA values we obtain the interval [ Table 1. Physical properties of different isotopes considered in this paper: atomic weight, W [26]; ββ decay Q-value [27][28][29][30][31]; the PMR for the nuclear matrix element (|M 0ν |, see text for discussion); inverse of ββ decay phase-space factor (|G 0ν | −1 , from [32]). For illustrative purposes, we also give the ββ0ν half-life for a fixed m ββ value (T 0ν 1/2 (m ββ = 50 meV)), and the expected number of isotope ββ0ν decays relative to 76 Ge ββ0ν decays for a fixed isotope mass (N 0ν /N 0ν (Ge)).…”

Section: Rate Of Neutrinoless Double Beta Decaymentioning

confidence: 99%

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Sense and sensitivity of double beta decay experiments

Gómez-Cadenas

Martín-Albo

Sorel

et al. 2011

J. Cosmol. Astropart. Phys.

150

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The search for neutrinoless double beta decay is a very active field in which the number of proposals for next-generation experiments has proliferated. In this paper we attempt to address both the sense and the sensitivity of such proposals. Sensitivity comes first, by means of proposing a simple and unambiguous statistical recipe to derive the sensitivity to a putative Majorana neutrino mass, m ββ . In order to make sense of how the different experimental approaches compare, we apply this recipe to a selection of proposals, comparing the resulting sensitivities. We also propose a "physics-motivated range" (PMR) of the nuclear matrix elements as a unifying criterium between the different nuclear models. The expected performance of the proposals is parametrized in terms of only four numbers: energy resolution, background rate (per unit time, isotope mass and energy), detection efficiency, and ββ isotope mass. For each proposal, both a reference and an optimistic scenario for the experimental performance are studied. In the reference scenario we find that all the proposals will be able to partially explore the degenerate spectrum, without fully covering it, although four of them (KamLAND-Zen, CUORE, NEXT and EXO) will approach the 50 meV boundary. In the optimistic scenario, we find that CUORE and the xenon-based proposals (KamLAND-Zen, EXO and NEXT) will explore a significant fraction of the inverse hierarchy, with NEXT covering it almost fully. For the long term future, we argue that 136 Xe-based experiments may provide the best case for a 1-ton scale experiment, given the potentially very low backgrounds achievable and the expected scalability to large isotope masses.

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Section: Rate Of Neutrinoless Double Beta Decaymentioning

confidence: 99%

“…Physical properties of different isotopes considered in this paper: atomic weight, W[26]; ββ decay Q-value[27][28][29][30][31]; the PMR for the nuclear matrix element (|M 0ν |, see text for discussion); inverse of ββ decay phase-space factor (|G 0ν | −1 , from…”

mentioning

confidence: 99%

Sense and sensitivity of double beta decay experiments

Gómez-Cadenas

Martín-Albo

Sorel

et al. 2011

J. Cosmol. Astropart. Phys.

150

View full text Add to dashboard Cite

show abstract

“…They agree well with each other (within ≤ 0.9σ). The new ISOLTRAP mass value with a slightly smaller uncertainty than that of the previous measurements deviates by 0.7 σ from the AME'95 value, but the three most precise of the previous measurements, i.e., the result from a β-end-point determination of the 82 Kr(β − ) 82 Br decay [43], a mass-spectrometry measurement [41], and the fairly recent datum from a highresolution deflection mass spectrometer [44] are in better agreement with our value. For the adjustment, all old input parameters are kept and the ISOLTRAP datum is added.…”

Section: Krmentioning

confidence: 59%