Isospin mixing in the decay of theT>giant dipole state

Abstract

The magnitude of the isospin mixing in the decay of the ${T}_{>}$ giant dipole resonance has been estimated, using the ($\ensuremath{\gamma}$, n) and ($\ensuremath{\gamma}$,p) cross sections available for the medium-weight nuclei $^{60}\mathrm{Ni}$, $^{88}\mathrm{Sr}$, $^{89}\mathrm{Y}$, $^{90}\mathrm{Zr}$, and $^{92}\mathrm{Mo}$. The deduced values show a fair correspondence with the existing data for mixing between compound states. From these results the mean mixing Coulomb matrix elements between compound states could also be derived.