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Efficient calculation for the quasiparticle random-phase approximation matrix

Paolo Avogadro

Takashi Nakatsukasa

  • Department of Physics & Astronomy, Texas A&M University-Commerce, Commerce, Texas 75428, USA and RIKEN Nishina Center, Wako 351-0198, Japan

  • RIKEN Nishina Center, Wako 351-0198, Japan and Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8571, Japan

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Phys. Rev. C 87, 014331 – Published 22 January, 2013

DOI: https://doi.org/10.1103/PhysRevC.87.014331

Abstract

We present an efficient numerical technique to evaluate the matrix of the (quasiparticle-) random-phase approximation, using the finite-amplitude method (FAM). The method is tested in calculation of monopole excitations in 120Sn, compared with result obtained with the former iterative FAM. The neutron-pair-transfer modes are calculated with the present method and their character change in neutron-rich Pb isotopes is discussed. Computational aspects of different FAM approaches are also discussed for future applications to a large-scale computation.

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Phys. Rev. C 87, 014331– Published 22 January, 2013
  • Received 25 October 2012

©2013 American Physical Society

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