Double Beta Decays of<sup>116</sup>Cd

Ejiri, H.; Fushimi, K.; Hazama, R.; Kawasaki, M.; Kouts, V. N.; Kudomi, Nobuyuki; Kume, Kazuhiko; Nagata, Kisaburo; Ohsumi, H.; Okada, K.; Sano, Hideto; Senoo, Toshio; Shibata, T.; Shima, T.; Tanaka, Junichi; Zdesenko, Y.G.

doi:10.1143/jpsj.64.339

Cited by 63 publications

(18 citation statements)

References 18 publications

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“…There are five independent positive results [35,61,63,62,22] that are in good agreement with each other when taking into account the corresponding error bars. Again, I use here the corrected result for the half-life value from Ref.…”

Section: CDsupporting

confidence: 72%

Average and recommended half-life values for two-neutrino double beta decay

2015

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All existing positive results on two neutrino double beta decay in different nuclei were analyzed. Using the procedure recommended by the Particle Data Group, weighted average values for half-lives of + 1 ) and 238 U were obtained. Existing geochemical data were analyzed and recommended values for half-lives of 128 Te, and 130 Ba are proposed. Given the measured half-life values, nuclear matrix elements were calculated using latest (more reliable and precise) values for phase space factor. Finally, previous results (PRC 81 (2010) 035501) were up-dated and results for 136 Xe were added.

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Section: CDsupporting

confidence: 72%

Average and recommended half-life values for two-neutrino double beta decay

2015

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“…82) ELEGANT V with drift chambers was used by Ejiri et al to study decays from 100 Mo and 116 Cd. 87,98) Recently, NEMO III with large tracking chambers is being used in 32) The corresponding mass limits are 0.7 -1.2 eV and 1.3 -3.2 eV, respectively. The data will be improved by conducting further experiments, as discussed in §5.2.…”

Section: )mentioning

confidence: 99%

Double Beta Decays and Neutrino Masses

2005

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Neutrino-less double beta decays (0), which violate the lepton number conservation law by ÁL ¼ 2, are of great interest for studying the fundamental properties of neutrinos beyond the standard electroweak theory. High-sensitivity 0 studies with mass sensitivities of the solar and atmosphericmasses are crucial for studying the Majorana nature of 's, the mass spectrum, the absolute -mass scale, the Majorana CP phases and other fundamental properties of neutrinos and weak interactions. Actually, high-sensitivity experiments of 0 are the unique and practical method for studying all these fundamental properties of neutrinos in the foreseeable future. On the basis of the recent oscillation studies, the effective mass sensitivity required for observing the 0 rate is of the order of the atmospheric mass scale of m A $ 50 meV in the case of the inverted mass hierarchy and of the order of the solar mass scale of m S $ 8 meV in the case of the normal hierarchy. The present detectors with sensitivities of 150 -300 meV are effective in the case of the quasi-degenerate mass spectrum. Future detectors with higher sensitivities of the orders of m A -m S , using different nuclei and methods (calorimetric, spectroscopic), are indispensable for establishing 0. Theoretical and experimental studies for evaluating nuclear matrix elements M 0 within 20 -30% are important for extracting the sensible mass from the 0 rate. Charge exchange reactions by means of nuclear, electron and probes provide useful data for M 0 . International collaboration for experimental and theoretical works are encouraged to perform next-generation experiments. High-sensitivity detectors can be used for studying rare nuclear processes such as solar 's, dark matter, charge nonconservation, and nucleon decays. This report is a brief review of double beta decays and neutrinos with emphasis on highsensitivity 0 studies for the Majorana mass.

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“…± 0.13 (syst.) MeV −1 , which is larger than the total value of 0.129 ± 0.005 MeV −1 derived [35] using the measured 2νββ decay rate of 116 Cd [36][37][38][39][40] and the SSD phase-space factor from Ref. [41].…”

Section: Xmentioning

confidence: 54%