Direct demonstration of the two-phonon structure of the $J^{\pi }=1_{4742\mathrm{keV}}^{-}$ state of ${}^{88}$Sr

J. Isaak, D. Savran, N. Pietralla +7

We have studied the decay pattern of the $J^{\pi }=1_{4742\mathrm{keV}}^{-}$ state of ${}^{88}$Sr to probe its quadrupole-octupole coupled two-phonon structure. In particular, a unique…