Double-β decay of 82Se

✍ Scribed by R. Arnold; C. Augier; J. Baker; A. Barabash; D. Blum; V. Brudanin; A.J. Caffrey; J.E. Campagne; E. Caurier; D. Dassié; V. Egorov; R. Eschbach; T. Filipova; R. Gurriaran; J.L. Guyonnet; F. Hubert; Ph. Hubert; S. Jullian; I. Kisel; O. Kochetov; V.N. Kornoukhov; V. Kovalenko; D. Lalanne; F. Laplanche; F. Leccia; I. Linck; C. Longuemare; Ch. Marquet; F. Mauger; P. Mennrath; H.W. Nicholson; I. Pilugin; F. Piquemal; O. Purtov; J-L. Reyss; X. Sarazin; F. Scheibling; J. Suhonen; C.S. Sutton; G. Szklarz; V. Timkin; R. Torres; V.I. Tretyak; V. Umatov; I. Vanyushin; A. Vareille; Yu. Vasilyev; Ts. Vylov; V. Zerkin

• Book ID: 104336917
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 734 KB
• Volume: 636
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(98)00208-5

✦ Synopsis

The NEMO-2 tracking detector located in the Fr6jus Underground Laboratory was designed as a prototype of the NEMO-3 detector to study neutrinoless (0v) and two neutrino (2v) double-beta decay (fir) physics. After 10357 h of running with an isotopically enriched selenium source (2.17 mol yr of S2Se) a flfl2v decay half-life of T1/2 = (0.83 4-0.10(stat) 4-0.07(syst)) × 1020 yr was measured. Limits with a 90% C.L. on the S2Se half-lives of 9.5 x 1021 yr for fl,a0v decay to the ground state, 2.8 x 1021 yr to the (2 +) excited state and 2.4 × 1021 yr for flflOvx ° decay with a Majoron (X °) were also obtained. Q 1998 Elsevier Science B.V.