First observation of the fine structure of the Pygmy Dipole Resonance in a nucleus away from stability via the ${\beta }^{-}$ decay of ${}^{92}$Rb to ${}^{92}$Sr

P. Spagnoletti, M. Ramalho, S. Tahtela +52

A comprehensive $\gamma$-ray spectroscopy study of excited states in ${}^{92}$Sr populated via ${\beta }^{-}$ decay of ${}^{92}$Rb ($J^{\pi }=0^{-}$, $Q_{\beta }=8095(6)$~keV) was performed with the GRIFFIN spect…