Measurement of the Double Beta Decay Half-life of 130Te with the NEMO-3   Detector

R. Arnold (1); C. Augier (2); J. Baker (3,23); A.S. Barabash (4); A.; Basharina-Freshville (5); S. Blondel (2); M. Bongrand (2); G. Broudin-Bay; (6,7); V. Brudanin (8); A.J. Caffrey (3); A. Chapon (9); E. Chauveau (10); D.; Durand (9); V. Egorov (8); R. Flack (5); X. Garrido (2); J. Grozier (5); B.; Guillon (9); Ph. Hubert (6,7); C.M. Jackson (10); S. Jullian (2); M. Kauer; (5); A. Klimenko (8); O. Kochetov (8); S.I. Konovalov (4); V. Kovalenko; (6,7,8); D. Lalanne (2); T. Lamhamdi (11); K. Lang (12); Z. Liptak (12); G.; Lutter (6,7); F. Mamedov (13); Ch. Marquet (6,7); J. Martin-Albo (14); F.; Mauger (9); J. Mott (5); A. Nachab (6,7); I. Nemchenok (8); C.H. Nguyen; (6,7,15); F. Nova (12); P. Novella (14); H. Ohsumi (16); R.B. Pahlka (12); F.; Perrot (6,7); F. Piquemal (6,7); J.L. Reyss (17); B. Richards (5); J.S. Ricol; (6,7); R. Saakyan (5); X. Sarazin (2); Yu. Shitov (8,18); L. Simard (2); F.; \v{S}imkovic (19); A. Smolnikov (8); S. S\"oldner-Rembold (10); I. \v{S}tekl; (13); J. Suhonen (20); C.S. Sutton (21); G. Szklarz (2); J. Thomas (5); V.; Timkin (8); S. Torre (5); V.I. Tretyak (1,8); V. Umatov (4); L. V\'ala (13),; I. Vanyushin (4); V. Vasiliev (5); V. Vorobel (22); T. Vylov (8,23); A.; Zukauskas (22) ((1) IPHC-DRS; Universit\'e de Strasbourg; CNRS/IN2P3; France,; (2) LAL; Universit\'e Paris-Sud 11; CNRS/IN2P3; France; (3) INL; Idaho; National Laboratory; Idaho Falls; (4) ITEP; Institute of Theoretical and; Experimental Physics; Moscow; Russia; (5) University College London; London,; UK; (6) Universit\'e Bordeaux; CENBG; Gradignan; France; (7) CNRS/IN2P3,; Centre d\' Etudes Nucl\'eaires de Bordeaux Gradignan; Gradignan; France; (8); JINR; Joint Institute for Nuclear Research; Dubna; Russia; (9) LPC; ENSICAEN,; Universit\'e de Caen; CNRS/IN2P3; France; (10) The University of Manchester,; Manchester UK; (11) USMBA; Universit\'e Sidi Mohamed Ben Abdellah; Fes,; Morocco; (12) University of Texas at Austin (13) IEAP; Czech Technical; University in Prague; Czech Republic; (14) IFIC; CSIC - Universitat de; Valencia; Valencia; Spain; (15) Hanoi University of Science; Hanoi; Vietnam,; (16) Saga University; Japan; (17) LSCE; CNRS; Gif-sur-Yvette; France; (18); Imperial College London; UK; (19) FMFI; Commenius University; Bratislava,; Slovakia; (20) Jyv\"askyl\"a University; Finland; (21) MHC; Mount Holyoke; College; South Hadley; MA; (22) Charles University in Prague; Faculty of; Mathematics; Physics; Prague; Czech Republic; (23) Deceased) (The NEMO-3; Collaboration)

arXiv:1104.3716·nucl-ex·August 22, 2011

Measurement of the Double Beta Decay Half-life of 130Te with the NEMO-3 Detector

R. Arnold (1), C. Augier (2), J. Baker (3,23), A.S. Barabash (4), A., Basharina-Freshville (5), S. Blondel (2), M. Bongrand (2), G. Broudin-Bay, (6,7), V. Brudanin (8), A.J. Caffrey (3), A. Chapon (9), E. Chauveau (10), D., Durand (9), V. Egorov (8), R. Flack (5), X. Garrido (2)

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TL;DR

This paper reports the first real-time observation and the most precise measurement of the half-life of double beta decay in 130Te using the NEMO-3 detector over 1275 days.

Contribution

It provides the first real-time detection and the most accurate half-life measurement of 130Te double beta decay to date.

Findings

01

Half-life of 130Te double beta decay measured as (7.0 +/- 0.9(stat) +/- 1.1(syst)) x 10^{20} years.

02

Decay rate found to be greater than zero with 7.7 sigma significance.

03

First observation of this decay in real-time.

Abstract

This Letter reports results from the NEMO-3 experiment based on an exposure of 1275 days with 661g of 130Te in the form of enriched and natural tellurium foils. The double beta decay rate of 130Te is found to be greater than zero with a significance of 7.7 standard deviations and the half-life is measured to be T1/2 = (7.0 +/- 0.9(stat) +/- 1.1(syst)) x 10^{20} yr. This represents the most precise measurement of this half-life yet published and the first real-time observation of this decay.

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