First application of the continuum-QRPA to description of the double beta decay
Abstract
A continuum-QRPA approach to calculation of the 2ββ- and 0ββ-amplitudes has been formulated. For 130Te a regular suppression (about 20%) of the high-multipole contributions to the 0ββ-amplitude has been found which can be associated with additional ground state correlations appearing from the transitions to collective states in the continuum. At the same time the total calculated 0ββ-amplitude for 130Te gets suppressed by about 20% as compared to the result of the usual, discretized, QRPA.
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