Collective vibrational states with fast iterative QRPA method

Details Collective vibrational states with fast iterative QRPA method Collective vibrational states with fast iterative QRPA method

2012-03-23

arxiv.org/abs/1203.5236v1

Physics

Nuclear Physics

Nuclear Theory

10 pages, 11 figures

Scientific paper

An iterative method we previously proposed to compute nuclear strength functions is developed to allow it to accurately calculate properties of individual nuclear states. The approach is based on the quasi-particle-random-phase approximation (QRPA) and uses an iterative non-hermitian Arnoldi diagonalization method where the QRPA matrix does not have to be explicitly calculated and stored. The method gives substantial advantages over conventional QRPA calculations with regards to the computational cost. The method is used to calculate excitation energies and decay rates of the lowest lying 2+ and 3- states in Pb, Sn, Ni and Ca isotopes using three different Skyrme interactions and a separable gaussian pairing force.

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