Widths of Isobaric Analog Resonances: a microscopic approach

Aizu-Wakamatsu; France; (4) Department of Physics; G. Colo`(1); H. Sagawa(2); Italy; (2) The University of Aizu; Japan); Japan; (3) Institut de Physique Nucleaire; Milano; Nihon University; N. Van Giai(3)

arxiv: nucl-th/9804055 · v1 · submitted 1998-04-23 · ⚛️ nucl-th

Widths of Isobaric Analog Resonances: a microscopic approach

G. Colo`(1) , H. Sagawa(2) , N. Van Giai(3) , P.F. Bortignon(1) , T. Suzuki(4) ((1) Dipartimento di Fisica , Universita` degli Studi , Milano , Italy; (2) The University of Aizu

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Aizu-Wakamatsu Japan; (3) Institut de Physique Nucleaire Orsay France; (4) Department of Physics Nihon University Tokyo Japan)

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keywords analogeffectsisobaricmicroscopicmodelresonanceadditionagreement

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A self-consistent particle-phonon coupling model is used to investigate the properties of the isobaric analog resonance in $^{208}$Bi. It is shown that quantitative agreement with experimental data for the energy and the width can be obtained if the effects of isospin-breaking nuclear forces are included, in addition to the Coulomb force effects. A connection between microscopic model predictions and doorway state approaches which make use of the isovector monopole resonance, is established via a phenomenological ansatz for the optical potential.

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Widths of Isobaric Analog Resonances: a microscopic approach

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