Final results of studies of 116Cd 2β decay with CdWO4 crystal scintillators, enriched in 116Cd to 82%, are presented. After few years (2011 – 2017) of measurements with radiopure 116CdWO4 scintillators (mass of 1.162 kg) at the Gran Sasso underground laboratory (Italy), the half-life of 116Cd relatively to 2ν2β decay to the ground state of 116Sn was measured with the highest up-to-date accuracy as yr. A new limit on 0ν2β decay of 116Cd was set as T1/2≥2.2×1023 yr at 90% C.L., which is the most stringent to-date restriction for this isotope. Limits for 0ν2β decay with majoron(s) emission, Lorentz-violating 2ν2β decay and 2β transitions to excited states of 116Sn were set at the level of T1/2≥1020−1022 yr.
REFERENCES
1.
A.S.
Barabash
, arXiv:1907.06887.2.
A.S.
Barabash
, Front. in Phys.
6
, 160
(2019
).3.
J.D.
Vergados
, H.
Ejiri
, F.
Simkovic
, Int. J. Mod. Phys. E
25
, 1630007
(2016
).4.
5.
M.
Wang
et al., Chin. Phys. C
41
, 030003
(2017
).6.
J.D.
Vergados
, H.
Ejiri
, F.
Simkovic
, Rep. Prog. Phys.
75
, 106301
(2012
).7.
J.
Meija
et al., Pure Appl. Chem.
88
, 293
(2016
).8.
H.
Ejiri
et al., J. Phys. Soc. Japan
64
, 339
(1995
).9.
F.A.
Danevich
et al., Phys. Lett. B
344
, 72
(1995
).10.
R.
Arnold
et al., Z. Phys. C
72
, 239
(1996
).11.
F.A.
Danevich
et al., Phys. Rev. C
62
, 045501
(2000
).12.
F.A.
Danevich
et al., Phys. Rev. C
68
, 035501
(2003
).13.
R.
Arnold
et al., Phys. Rev. D
95
, 012007
(2017
).14.
A.S.
Barabash
et al., Phys. Rev. D
98
, 092007
(2018
).15.
A.S.
Barabash
, Phys. Rev. C
81
, 035501
(2010
).16.
A.S.
Barabash
et al., JINST
6
, P08011
(2011
).17.
W.R.
Nelson
, H.
Hirayama
, D.W.O.
Rogers
, SLAC Report No. SLAC-265 (1985
).18.
O.A.
Ponkratenko
, V.I.
Tretyak
, Yu.G.
Zdesenko
, Phys. At. Nucl.
63
, 1282
(2000
); V.I. Tretyak, to be published.
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