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Limits on Majoron modes of 116Cd neutrinoless 2β decay

✍ Scribed by F.A. Danevich; A.Sh. Georgadze; V.V. Kobychev; B.N. Kropivyansky; A.S. Nikolaiko; O.A. Ponkratenko; V.I. Tretyak; Yu.G. Zdesenko

Book ID
104337136
Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
683 KB
Volume
643
Category
Article
ISSN
0375-9474

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✦ Synopsis

Measurements of ll6Cd double beta decay with the help of enriched ll6CdWO4 crystal scintillators are in progress in the Solotvina Underground Laboratory. The last part of the exposition with the background rate 0.7 counts/y.kg.keV (in the region of 116Cd Ov2fl decay 2.7-2.9 MeV) is 22826 hours. For neutrinoless modes with emission of one and two Majorons, the limits T1/2(OvM1) >~ 1.2 x 1021 y and Tt/2(OvM2) >~ 2.6 x 102o y (90% C.L.) are determined. The above mentioned values give the restriction on the Majoron-neutrino coupling constant of gu <<. 2.1 × 10 -4. To improve these results, an advanced set-up with four enriched ll6CdWO4 detectors shielded by fifteen large ( 1.5-2 kg) CdWO4 crystals has been mounted. (~) 1998 Elsevier Science B.V.

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