Abstract
A Xenon TPC with an active volume of 207 liters has been built to study the neutrinoless double beta decay in 136Xe. Data were taken in the Gotthard Underground Laboratory with 5 atm of xenon enriched to 62.5% in 136Xe. A total of 6830 hours of data has been taken. New limits on neutrino mass and majoron decay are presented.
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