2-NEUTRINO DOUBLE-BETA-DECAY IN COUPLED QRPA WITH NEUTRON - PROTON PAIRING

被引：63
|
作者：
CHEOUN, MK
BOBYK, A
FAESSLER, A
SIMKOVIC, F
TENEVA, G
机构：
[1] University of Tübingen, Institut für Theoretische Physik, 7400 Tübingen
来源：
NUCLEAR PHYSICS A | 1993年 / 564卷 / 03期
关键词：
D O I：
10.1016/0375-9474(93)90508-U
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Two-neutrino double-beta decay rates of Ca-46(20)26, Ca-48(20)-28, Ge-76(32)44 and Se-82(34)48 are calculated with inclusion of neutron-proton (np) pairing correlations in describing the ground states of initial and final nuclei. Inclusion of np pairing correlations yields stronger bound nuclei as solutions of the HFB equation. Our results show that even in medium and medium-heavy nuclei, np pairing correlations reduce the Gamow-Teller matrix elements compared to the results without np pairing. Further, the dependence of these matrix elements on the particle-particle strength parameter g(pp) is reduced remarkably.
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页码：329 / 344
页数：16
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