Abstract
48Ca, the lightest double beta decay candidate, has been until now the only one simple enough to be treated exactly in the nuclear shell model. Thus, theββ(2ν) half-life measurement, reported here, provides a unique test of the nuclear physics involved in theββ matrix element calculation. Enriched48Ca sources of two different thicknesses have been exposed in a time projection chamber, and yieldT 2/2ν1 =(4.3 +2.4−1.1 [stat.] ± 1.4[syst.]) × 1019 years, compatible with the shell model calculations. The consequences of this result for the shell model calculation of theββ(2ν) rate are briefly discussed.
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A. Balysh et al.: Phys. Rev. Lett.77 (1996) 5186.
F. Boehm and P. Vogel:Physics of Massive Neutrinos, 2nd ed., Cambridge Univ. Press, Cambridge, 1992.
R.K. Bardin, P.J. Gollon, J.D. Ullman, and C.S. Wu: Nucl. Phys. A158 (1970) 337.
A. Poves, R.P. Bahukutumbi, K.H. Langanke, and P. Vogel: Phys. Lett. B361 (1995) 1.
W.C. Haxton and G.J. Stephenson, Jr.: Progr. Part. Nucl. Phys.12 (1984) 409.
S.R. Elliott, A.A. Hahn, and M.K. Moe: Nucl. Instrum. Meth. in Phys. Res. A273 (1988) 226.
M.K. Moe, M.A. Nelson, and M.A. Vient: Prog. Part. Nucl. Phys.32 (1994) 247.
K. Ogawa and H. Horie: inNuclear Weak Processes and Nuclear Structure (Eds. M. Morita et al.), World Scientific, Singapore, 1989, p. 308.
E. Caurier, A. Poves, and A.P. Zuker: Phys. Lett. B252 (1990) 13.
E. Caurier, A.P. Zuker, A. Poves, and G. Martinez-Pinedo: Phys. Rev. C50 (1994) 225.
L. Zhao, B.A. Brown, and W.A. Richter: Phys. Rev. C42 (1990) 1120.
E. Caurier, A. Poves, and A.P. Zuker: Phys. Rev. Lett.74 (1995) 1517.
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This work was funded by the US Department of Energy under contracts DE-FG03-01ER40679 and DE-FG03-88ER40397.
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Balysh, A., Lebedev, V.I., Pronskiy, A. et al. Double beta decay of48Ca. Czech J Phys 48, 147–154 (1998). https://doi.org/10.1023/A:1021203622422
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DOI: https://doi.org/10.1023/A:1021203622422