Limits on different Majoron decay modes of 100 Mo, 116 Cd, 82 Se and 96 Zr for neutrinoless double beta decays in the NEMO-2 experiment

doi:10.1016/S0375-9474(00)00326-2

Nuclear Physics A

Volume 678, Issue 3, 9 October 2000, Pages 341-352

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Abstract

The NEMO-2 tracking detector located in the Fréjus Underground Laboratory was designed as a prototype for the NEMO-3 detector and to study different modes of double beta decay. Measurements with $^{100}$ Mo, $^{116}$ Cd, $^{82}$ Se and $^{96}$ Zr were carried out. Presented here are the experimental half-life limits on double beta decays for new Majoron emission modes and limits on effective neutrino–Majoron coupling constants.

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Nuclear Data Sheets for A=100
2021, Nuclear Data Sheets
Evaluated experimental data are presented for 15 known nuclides of mass 100 (Kr, Rb, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn). Recommended values are given for level parameters, γ and β radiations, and other spectroscopic information. No excited states are known in ¹⁰⁰Rb and ¹⁰⁰Sn. Except for isotopic identification, no information is available for the decay of the ¹⁰⁰Kr isotope, and limited information is known about the decay properties of the ¹⁰⁰Sn isotope. According to Fig. 2 (A/Q versus counts plot) and as mentioned in the text in 2021Su01, ¹⁰⁰Br isotope was not observed, although, discovery of ¹⁰¹Br was claimed in this work. In the case of ¹⁰⁰Pd, the agreement in the orderings of the γ-ray cascades and γ-ray inventory between various studies of high-spin structures remains poor at high excitation energies (>9 MeV). For ¹⁰⁰Y, the assignments of the two previously known half-lives to the respective states (g.s. and the 145-keV isomer) remain to be established. This work supersedes earlier full evaluations of A=100 by 2008Si01, 1997Si09, 1990Si05 and 1974Ko37.
Measurement of the two neutrino double beta decay half-life of Zr-96 with the NEMO-3 detector
2010, Nuclear Physics A
Using 9.4 g of ⁹⁶Zr isotope and 1221 days of data from the NEMO-3 detector corresponding to 0.031 kg y, the obtained $2 ν β β$ decay half-life measurement is $T_{1 / 2}^{2 ν} = [2.35 \pm 0.14 (stat) \pm 0.16 (syst)] \times 10^{19} yr$ . Different characteristics of the final state electrons have been studied, such as the energy sum, individual electron energy, and angular distribution. The 2ν nuclear matrix element is extracted using the measured $2 ν β β$ half-life and is $M^{2 ν} = 0.049 \pm 0.002$ . Constraints on $0 ν β β$ decay have also been set.
Nuclear Data Sheets for A = 116
2010, Nuclear Data Sheets
Nuclear Data Sheets for A = 100
2008, Nuclear Data Sheets
The evaluated experimental data are presented for 15 known nuclides of mass 100 (Kr, Rb, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn). High spin excitations are known for ¹⁰⁰Sr, ¹⁰⁰Zr, ¹⁰⁰Mo, ¹⁰⁰Tc, ¹⁰⁰Ru, ¹⁰⁰Rh, ¹⁰⁰Pd, ¹⁰⁰Ag, and ¹⁰⁰Cd. The neutron capture data are available for ¹⁰⁰Tc and ¹⁰⁰Ru. Particle transfer data exist for structures in ¹⁰⁰Nb, ¹⁰⁰Mo, ¹⁰⁰Tc and ¹⁰⁰Ru. The two-neutrino ββ decay mode in ¹⁰⁰Mo is fully established with measured half-life and population of the g.s. and 1130,0+ state in ¹⁰⁰Ru. The absolute energy of the isomer in ¹⁰⁰Nb is now well established from recent Penning-trap mass measurements.
Excited state data are nonexistent for ¹⁰⁰Kr, ¹⁰⁰Rb and ¹⁰⁰Sn; and only one excited state is known in ¹⁰⁰In. Except for isotopic identification, no information is available for the decay of the ¹⁰⁰Kr isotope and very little is known about the decay properties of the ¹⁰⁰Sn isotope. In the case of ¹⁰⁰Pd, there are many recent studies of high-spin structures but the agreement in the orderings of the γ-ray cascades and γ-ray inventory between various studies remains poor at high (>9 MeV) excitation energies. The energy difference between the g.s. an isomer in ¹⁰⁰Y has recently been precisely measured in Penning-Penning-trap mass measurements, however, the assignments of the two previously known half-lives and Jπ's to the respective states (g.s. and the 145-keV isomer) in ¹⁰⁰Y remains to be established. Static moments in ¹⁰⁰Y have also been recently measured for one of these states in ¹⁰⁰Y but it is not definitely known as to which of the two states (g.s. or the isomer) is connected with these measurements.
This work supersedes earlier full evaluations of A = 100 by 1997Si09, 1990Si05 and 1974Ko37.
Nuclear data sheets for A = 82
2003, Nuclear Data Sheets
The 1995 evaluation of A=82 (1987Mu01) has been revised using experimental decay and reaction data received by the cutoff date noted below. Major developments are:
⁸²Ni: A few theoretical references calculating pairing correlation energies, but nuclide not seen.
⁸²Zn: Produced in fission. No properties known.
⁸²Ge: Some pairing calculations.
⁸²As: 1− isomer adopted as g.s.; 5− excitation energy is uncertain.
⁸²Rb: New (HI,xnγ) data.
⁸²Se: Large number of measurements on 0v and 2v 2β⁻ decay. Major new work is (n,n′γ).
⁸²Y: New T_1/2. New (HI,xnγ) data.
⁸²Zr: New (HI,xnγ); many new bands.
⁸²Nb: Measured half-life, inferred β⁺ decay.
⁸²Mo: Calculated mass, etc, nuclide not observed.
Limits on Majoron emitting neutrinoless double-beta decay of <sup>100</sup>Mo
2002, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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Limits on different Majoron decay modes of 100 Mo, 116 Cd, 82 Se and 96 Zr for neutrinoless double beta decays in the NEMO-2 experiment

Abstract

Phys. Lett. B

Nucl. Phys. B

Phys. Lett. B

Phys. Lett. B

Phys. Lett. B

Phys. Rev. D

Nucl. Phys. B

Phys. Lett. B

Phys. Lett. B

Z. Phys. C

Nucl. Phys. A

Nucl. Phys. A

Nucl. Instrum. Methods A

Nucl. Phys. A

Nucl. Phys. A

Phys. Lett. B

Phys. Lett. B

Prog. Part. Nucl. Phys.

Nucl. Phys. A

Nucl. Phys. A

Nucl. Instrum. Methods A

Nucl. Instrum. Methods B

Limits on different Majoron decay modes of $^{100}$ Mo, $^{116}$ Cd, $^{82}$ Se and $^{96}$ Zr for neutrinoless double beta decays in the NEMO-2 experiment