Electromagnetic transitions between giant resonances within a continuum-RPA approach

Details Electromagnetic transitions between giant resonances within a continuum-RPA approach Electromagnetic transitions between giant resonances within a continuum-RPA approach

2002-02-08

arxiv.org/abs/nucl-th/0202029v2

Phys.Lett. B541 (2002) 71-76

Physics

Nuclear Physics

Nuclear Theory

10 pages, 2 figures, uses elsart.sty

Scientific paper

10.1016/S0370-2693(02)02187-1

A general continuum-RPA approach is developed to describe electromagnetic transitions between giant resonances. Using a diagrammatic representation for the three-point Green's function, an expression for the transition amplitude is derived which allows one to incorporate effects of mixing of single and double giant resonances as well as to take the entire basis of particle-hole states into consideration. The radiative widths for E1 transition between the charge-exchange spin-dipole giant resonance and Gamow-Teller states are calculated for ^{90}Nb and ^{208}Bi nuclei. The importance of the mixing is stressed.

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