Abstract
The results of the Milano experiment on 0τ-ββ decay of 130Te which is undertaken in the Gran Sasso Underground Laboratory are presented. The experiment consists of a 334 g TeO 2 crystal which operates at about 10 mK with an extremely good long term resolution. After 4104 hours of effective running, no evidence of the neutrinoless double beta decay of 130Te has been observed yielding a lower limit on the process half-life of 8.2×10 21 years with a 90% of confidence level, which is about one order of magnitude more stringent than that obtained by geochemical measurements. This result confirms that the ββ decay of 130Te is dominated by the 2τ channel.
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