Level structure ofSe69
Citations Over TimeTop 14% of 2004 papers
Abstract
Excited levels in $^{69}\mathrm{Se}$ have been studied using the $^{40}\mathrm{Ca}(^{32}\text{S},2pn)^{69}\mathrm{Se}$ reaction at 95- and $105\text{\ensuremath{-}}\text{MeV}$ beam energy. $\ensuremath{\gamma}$ rays have been detected with the EUROBALL spectrometer operated in conjunction with the neutron wall and the charged-particle detector array EUCLIDES. New level sequences with positive and negative parities have been identified from $n\text{\ensuremath{-}}\ensuremath{\gamma}\ensuremath{\gamma}$ and $n\text{\ensuremath{-}}\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\gamma}$ coincidences. Spins have been assigned to many of the levels on the basis of angular distribution and directional correlation measurements. Excitation energies of the positive-parity yrast band and the branching ratios of its decay are compared with the predictions of the rigid triaxial rotor plus particle model.
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