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Search for charge non-conserving processes in 127I by coincidence technique
Ist Teil von
The European physical journal. C, Particles and fields, 2012-03, Vol.72 (3), p.1-6, Article 1920
Ort / Verlag
Berlin/Heidelberg: Springer-Verlag
Erscheinungsjahr
2012
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
New lifetime limits on the charge non-conserving (CNC) electron capture with excitation of the 417.9 keV nuclear level in the
127
I are established by using the coincidence technique. The analysed exposure is 0.87 ton × yr, collected deep underground at the Gran Sasso National Laboratory of the INFN by the highly radiopure DAMA/LIBRA setup (≈250 kg of highly radiopure NaI(Tl)). The new limit on the mean life is
τ
>1.2×10
24
yr (90 % C.L.), about one order of magnitude larger than those previously available for CNC electron capture involving nuclear level excitations of
127
I and of the same order of magnitude than those achieved for analogous processes in
129
Xe.