Phys. Rev. C 78, 014317 (2008) [12 pages]Isospin-spin excitations in the A=58 mass region: The 58Ni(3He,t)58Cu reactionReceived 24 July 2006; revised 10 April 2008; published 24 July 2008 The experimental information on isospin-spin excitations around 58Ni is analyzed by using isoscalar and isovector pairing vibrations, Gamow-Teller (GT) modes, and their couplings. It is found that the proposed coupling scheme accounts for a sizable amount of the strength associated with isospin-spin excitations, which include transitions to both one- and two-phonon states. The calculations are performed within the framework of perturbation theory, accounting for the renormalization of the charge by the collective GT excitations. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.78.014317
DOI:
10.1103/PhysRevC.78.014317
PACS:
21.60.Fw, 21.30.Fe, 24.30.Gd, 27.40.+z
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