Precise measurement of 2ν2$\beta$ decay of $^{100}$Mo with Li$_2$MoO$_4$ low temperature detectors: Preliminary results

E. Armengaud (1) , C. Augier (2) , A.S. Barabash , F. Bellini , A. Benoit (3) , M. Beretta , L. Bergé (4) , N. Besson (1) , J. Billard (2) , Yu. A. Borovlev , Ch. Bourgeois (5) , V. Brudanin , P. Camus (6) , L. Cardani , N. Casali , A. Cazes (2) , M. Chapellier (4) , F. Charlieux (2) , M. de Combarieu (7) , F.A. Danevich , I. Dafinei , M.De Jesus (2) , L. Dumoulin (4) , K. Eitel , F. Ferri (1) , B.F. Fujikawa , J. Gascon (2) , L. Gironi , A. Giuliani (4) , V.D. Grigorieva , M. Gros (1) , E. Guerard (5) , H.Z. Huang , R.Huang Lbnl , J. Johnston , A. Juillard (2) , H. Khalife (4) , M. Kleifges , V.V. Kobychev , Yu. G. Kolomensky , S.I. Konovalov , A. Leder , J. Kotila , P. Loaiza (5) , R. Maisonobe (2) , E.P. Makarov , P. de Marcillac (4) , S. Marnieros (4) , X.F. Navick (1) , C. Nones (1) , V. Novati (4) , E. Olivieri (4) , L. Pagnanini , P. Pari (7) , L. Pattavina , M. Pavan , B. Paul (1) , H. Peng , G. Pessina , S. Pirro , D.V. Poda (4) , O. Polischuk , E. Previtali , E. Queguiner (2) , T. Redon (4) , S. Rozov , C. Rusconi , V. Sanglard (2) , K. Schäffner , Y. Shen , B. Schmidt , V.N. Shlegel , B. Siebenborn , S. Sorbino , C. Tomei , V.I. Tretyak , V.I. Umatov , L. Vagneron (2) , M. Velázquez (8, 9) , M. Vignati , M. Weber , L. Winslow , M. Xue , E. Yakushev , A.S. Zolotarova (1)

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
2 IPNL - Institut de Physique Nucléaire de Lyon
3 NEEL - HELFA - Hélium : du fondamental aux applications
4 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
5 LAL - Laboratoire de l'Accélérateur Linéaire
6 NEEL - Cryo - Cryogénie
7 IRAMIS - Institut Rayonnement Matière de Saclay (DRF)
8 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
9 SIMaP - Science et Ingénierie des Matériaux et Procédés

The half-life of 100Mo relatively to the 2ν2β decay to the ground state of 100Ru was measured as T1/2 = (6.99±0.15) × 1018 yr with the help of enriched in 100Mo lithium molybdate scintillating bolometers in the EDELWEISS-III low background set-up at the Modane underground laboratory. This is the most accurate value of the 2ν2β half-life of 100Mo.

Mots clés: detector: temperature; temperature: low; background: low; molybdenum: semileptonic decay; scintillation counter: crystal; energy: ground state; bolometer; double-beta decay: (2neutrino); molybdenum: nuclide; experimental results; lifetime: measured

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

E. Armengaud, C. Augier, A.S. Barabash, F. Bellini, A. Benoit, et al.. Precise measurement of 2ν2$\beta$ decay of $^{100}$Mo with Li$_2$MoO$_4$ low temperature detectors: Preliminary results. Matrix Elements for the Double-beta-decay EXperiments, May 2019, Prague, Czech Republic. pp.020005, ⟨10.1063/1.5130966⟩. ⟨hal-02394748⟩