Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2000-12-07
Nucl.Phys. A697 (2002) 127-140
Physics
Nuclear Physics
Nuclear Theory
15 pages, 4 figures, to be published in Nucl.Phys.A
Scientific paper
10.1016/S0375-9474(01)01239-8
We investigate the role the interweaving of surface vibrations and nucleon motion has on Cooper pair formation in spherical superfluid nuclei. A quantitative calculation of the state-dependent pairing gap requires to go beyond the quasiparticle approximation, treating in detail the breaking of the single-particle strength and of the associated poles. This is done solving self-consistently the Dyson equation, including both a bare nucleon-nucleon interaction (which for simplicity we choose as a monopole-pairing force of constant matrix elements g) and an induced interaction arizing from the exchange of vibrations (calculated microscopically in QRPA) between pairs of nucleons moving in time reversal states. Both the normal and anomalous density Green functions are included, thus treating self-energy and pairing processes on equal footing. We apply the formalism to the superfluid nucleus 120Sn. Adjusting the value of g so as to reproduce, for levels close to the Fermi level, the empirical odd-even mass difference (Delta approx 1.4 MeV), it is found that the pairing gap receives about equal contributions from the monopole-pairing force and from the induced interaction. [More sentences continue. See the main body.]
Barranco Francisco
Bortignon Pier Francesco
Broglia Ricardo A.
Terasaki J.
Vigezzi Enrico
No associations
LandOfFree
Solution of the Dyson equation for nucleons in the superfluid phase does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Solution of the Dyson equation for nucleons in the superfluid phase, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solution of the Dyson equation for nucleons in the superfluid phase will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-579540