Measurement of the double- decay of 150Nd to the 01+ excited state of 150Sm in NEMO-3
X. Aguerre,R. Arnold,C. Augier,A. S. Barabash,A. Basharina-Freshville,S. Blondel,S. Blot,M. Bongrand,R. Breier,V. Brudanin,J. Busto,A. Bystryakov,A. J. Caffrey,C. Cerna,J. P. Cesar,M. Ceschia,E. Chauveau,A. Chopra,L. Dawson,D. Duchesneau,D. Durand,J. J. Evans,R. Flack,P. Franchini,X. Garrido,C. Girard-Carillo,B. Guillon,P. Guzowski,M. Hoballah,R. Hodak,P. Hubert,M. H. Hussain,S. Jullian,A. Klimenko,O. Kochetov,S. I. Konovalov,F. Konarik,T. Krizak,D. Lalanne,K. Lang,Y. Lemiere,P. Li,P. Loaiza,G. Lutter,M. Macko,F. Mamedov,C. Marquet,F. Mauger,A. Minotti,B. Morgan,I. Nemchenok,M. Nomachi,F. Nowacki,H. Ohsumi,G. Oliviero,V. Palusova,C. Patrick,F. Perrot,M. Petro,A. Pin,F. Piquemal,P. Povinec,S. Pratt,P. Pridal,W. S. Quinn,Y. A. Ramachers,A. Remoto,J. L. Reyss,C. L. Riddle,E. Rukhadze,R. Saakyan,A. Salamatin,R. Salazar,X. Sarazin,J. Sedgbeer,Yu. Shitov,L. Simard,F. Simkovic,A. Smetana,A. Smolnikov,S. Soeldner-Rembold,I. Stekl,J. Suhonen,G. Szklarz,H. Tedjditi,J. Thomas,V. Timkin,V. I. Tretyak,V. I. Tretyak,V. I. Umatov,I. Vanushin,Y. Vereshchaka,V. Vorobel,D. Waters,F. Xie
EUROPEAN PHYSICAL JOURNAL C（2023）
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摘要
The NEMO-3 results for the double-beta decay of150Nd to the 0+1and 2+1excited states of150Sm are reported The data recorded during 5.25 year with 36.6 g of the iso-tope150Nd are used in the analysis. The signal of the 2 nu beta beta transition to the 0+1excited state is detected with a statisti-cal significance exceeding 5 sigma. The half-life is measured tobeT(1/2)(0 nu beta beta)((0+1)=[1.11+0.19-0.14(stat)+0.17-0.15(syst)]x10(20 )year, which is the most precise value that has been measuredto date. 90% confidence-level limits are set for the otherdecay modes. For the 2 nu beta beta decay to the 2+1level the limitisT2 nu beta beta 1/2(2+1)>2.42x10 (20 )year. The limits on the 0 nu beta beta decay to the 0+1and 2+1levels of150Sm are significantlyimproved toT0 nu beta beta 1/2(0+1)>1.36x1022year and T-1/2(0 nu beta beta)(2+1)>1.26x10(22)year
