Quest for double beta decay of 160Gd and Ce isotopes

✍ Scribed by F.A. Danevich; V.V. Kobychev; O.A. Ponkratenko; V.I. Tretyak; Yu.G. Zdesenko

• Book ID: 104334777
• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 260 KB
• Volume: 694
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(01)00983-6

✦ Synopsis

The 2β decay study of 160 Gd has been performed in the Solotvina Underground Laboratory with the help of Gd 2 SiO 5 :Ce crystal scintillator (volume 95 cm 3 ). The background of the detector in the vicinity of the Q ββ energy of 160 Gd was reduced to 1.0 cpd/(keV kg). The new improved half-life limits have been established for 0ν2β decay of 160 Gd to the ground (0 + ) and first excited (2 + ) levels of 160 Dy: T 0ν 1/2 2.3(1.3) × 10 21 yr at 68%(90%) C.L. The T 1/2 bounds have been also set for 2ν, 0νχ and 0νχχ modes of 160 Gd decay, as well as for different 2β decay processes in 136 Ce, 138 Ce and 142 Ce.