Measurement of the double- $\mathit{\beta }$ decay half-life of ${}^{136}$Xe with the KamLAND-Zen experiment

Journal Article · Thu Apr 19 00:00:00 EDT 2012 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.85.045504· OSTI ID:1082185

Gando, A.; Gando, Y.; Hanakago, H.; Ikeda, H.; Inoue, K.; Kato, R.; Koga, M.; Matsuda, S.; Mitsui, T.; Nakada, T.; Nakamura, K.; Obata, A.; Oki, A.; Ono, Y.; Shimizu, I.; Shirai, J.; Suzuki, A.; Takemoto, Y.; Tamae, K.; Ueshima, K. ; Watanabe, H.; Xu, B. D.; Yamada, S.; Yoshida, H.; Kozlov, A.; Yoshida, S.; Banks, T. I.; Detwiler, J. A.; Freedman, S. J.; Fujikawa, B. K.; Han, K.; O’Donnell, T.; Berger, B. E.; Efremenko, Y.; Karwowski, H. J.; Markoff, D. M.; Tornow, W.; Enomoto, S.; Decowski, M. P.

We present results from the KamLAND-Zen double-beta decay experiment based on an exposure of 77.6 days with 129 kg of ¹³⁶Xe. The measured two-neutrino double-beta decay half-life of ¹³⁶Xe is T$$2ν\atop{1/2}$$ = 2.38 ± 0.02(stat) ± 0.14(syst) x10²¹ yr, consistent with a recent measurement by EXO-200. We also obtain a lower limit for the neutrinoless double-beta decay half-life, T$$0ν\atop{1/2}$$ > 5.7 x 10²⁴ yr at 90% C.L.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE; Japanese Ministry of Education, Culture, Sports, Science and Technology; World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
• Contributing Organization: KamLAND-Zen Collaboration
• DOE Contract Number: AC02-05CH11231; 21000001
• OSTI ID: 1082185
• Report Number(s): LBNL-5380E; PRVCAN
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 85, Issue 4; ISSN 0556-2813
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS