Abstract
A Ge detector system was built possessing significnt reduced background, from natural radioactivities, notably 208-TI (2.6 MeV line). After a 2600 h measuring period a lower limit for the half life of the neutrinoless double beta decay in 76- Ge of T( 1 2 oν) > 1.7 × 10 22 yr (1σ) was obtained, corresponding to a neutrino mass upper limit of 22 eV.
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