Extended quasiparticle random phase approximation at finite temperature: Calulation of single beta decay Fermi transitions

O. CIVITARESE; J. HIRSH; F. MONTANI; M. REBOIRO

PHYS. REV. - C

AMER PHYSICAL SOC

Lugar: New York; Año: 2000 vol. 62 p. 54318 - 54324

0556-2813

The formalism of the quasiparticle random phase aproximation, extended to include scattering terms in the equation of motion, is used to describe allowed single beta decay transitions of Fermi type at finite temperature. The calculations were performed by using a realistic single particle basis and a separable two body interaction in the proton-neutron channel. The behavior of the Ikeda sum rule is studied and it is found that this sum rule is strictly conserved in the presence of particle-particle and hole-hole correlations. As an example on the validity of the formalism the case of Fermi transition in 76Ge is considered