On the properties of charge-exchange dipole excitations and the T > component of a giant dipole resonance in spherical nuclei |
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Authors: | I. V. Safonov M. L. Gorelik M. H. Urin |
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Affiliation: | (1) Moscow Engineering Physics Institute (State University), Kashirskoe sh. 31, Moscow, 115409, Russia |
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Abstract: | Within the semimicroscopic approach based on the random-phase approximation that takes exactly into account a single-particle continuum and on a phenomenological inclusion of the fragmentation effect, it is proposed to describe the strength functions for charge-exchange giant dipole resonances and cross sections for photoabsorption and for partial “direct + semidirect” (γ, p) reactions in the vicinity of a giant E1 resonance with allowance for the isospin-splitting effect. The results of the calculations performed for some magic and semimagic nuclei without resort to free parameters are compared with available experimental data. |
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