https://doi.org/10.1140/epja/i2008-10615-5
Regular Article — Theoretical Physics
A stabilized pairing functional
Institut für Theoretische Physik, Universität Erlangen, Staudtstrasse 7, D-91058, Erlangen, Germany
* e-mail: Jochen.Erler@physik.uni-erlangen.de
Received:
7
February
2008
Revised:
19
May
2008
Published online:
14
July
2008
We propose a modified pairing functional for nuclear-structure calculations which avoids the abrupt phase transition between pairing and non-pairing states. The intended application is the description of nuclear collective motion where the smoothing of the transition is compulsory to remove singularities. The stabilized pairing functional allows a thoroughly variational formulation, unlike the Lipkin-Nogami (LN) scheme which is often used for the purpose of smoothing. First applications to nuclear ground states and collective excitations prove the reliability and efficiency of the proposed stabilized pairing.
PACS: 21.10.Dr Binding energies and masses – / 21.10.Re Collective levels – / 21.60.-n Nuclear structure models and methods – / 74.20.Fg BCS theory and its development –
© SIF, Springer-Verlag Berlin Heidelberg, 2008
