14-16 November 2011
IPN Orsay
Europe/Paris timezone

Microscopic theory of the gamma decay of nuclear giant resonances

15 Nov 2011, 10:00
30m
Auditorium Irène Joliot-Curie (IPN Orsay)

Auditorium Irène Joliot-Curie

IPN Orsay

Speaker

Mr Marco Brenna (Dipartimento di Fisica, Universita' degli Studi di Milano and INFN, Sezione Milano)

Description

A microscopic formalism that allows the calculation of the gamma decay of nuclear excited states has been developed. In particular, it has been applied to the direct gamma decay of the Isoscalar Giant Quadrupole Resonance in 208Pb to the ground state and to the low-lying octupole state, as well. The phonons are calculated within fully self-consistent RPA, while the calculation of the gamma decay width is performed at the lowest contributing order of the perturbation theory within the framework of the Nuclear Field Theory (NFT), including consistently the whole effective Skyrme interaction in the particle-vibration couplig vertex. The decay width to the lowest 3- state turns out to be only a few percent of the decay width to the ground state, as indicated by the experiment.

Primary author

Mr Marco Brenna (Dipartimento di Fisica, Universita' degli Studi di Milano and INFN, Sezione Milano)

Co-authors

Prof. Gianluca Colo' (Dipartimento di Fisica, Universita' degli Studi di Milano and INFN, Sezione Milano) Prof. Pier Francesco Bortignon (Dipartimento di Fisica, Universita' degli Studi di Milano and INFN, Sezione Milano)

Presentation Materials