https://doi.org/10.1140/epja/i2004-10048-2
Effects of phonon-phonon coupling on low-lying states in neutron-rich Sn isotopes
1
Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980, Dubna, Moscow region, Russia
2
CNRS-IN2P3, Université Paris-Sud, Institut de Physique Nucléaire, F-91406, Orsay Cedex, France
* e-mail: voronov@thsun1.jinr.ru
Received:
2
February
2004
Accepted:
14
July
2004
Published online:
11
November
2004
Starting from an effective Skyrme interaction we present a method to take into account the coupling between one- and two-phonon terms in the wave functions of excited states. The approach is a development of a finite rank separable approximation for the quasiparticle RPA calculations proposed in our previous work. The influence of the phonon-phonon coupling on energies and transition probabilities for the low-lying quadrupole and octupole states in the neutron-rich Sn isotopes is studied.
PACS: 21.60.Jz Hartree-Fock and random-phase approximations – / 24.30.Cz Giant resonances – / 27.30.+t 20 ⩽ A ⩽ 38 – / 27.40.+z 39 ⩽ A ⩽ 58 –
© Società Italiana di Fisica and Springer-Verlag, 2004
