Ground State Particle–Particle Correlations and Double-Beta Decay

✍ Scribed by A.A. Raduta; P. Sarriguren; Amand Faessler; E.Moya de Guerra

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 170 KB
• Volume: 294
• Category: Article
• ISSN: 0003-4916
• DOI: 10.1006/aphy.2001.6183

✦ Synopsis

A self-consistent formalism for the double-beta decay of Fermi type is provided. The particleparticle channel of the two-body interaction is considered first in the mean field equations and then in the quasiparticle random phase approximation (QRPA). The resulting approach is called the QRPA with a self-consistent mean field (QRPASMF). The mode provided by QRPASMF does not collapse for any strength of the particle-particle interaction. The transition amplitude for double-beta decay is almost insensitive to the variation of the particle-particle interaction. Comparing it with the result of the standard pnQRPA, it is smaller by a factor of 6. The prediction for transition amplitude agrees quite well with the exact result. The present approach is the only one that produces a strong decrease of the amplitude and at the same time does not alter the stability of the ground state.