Level Lifetimes and the Structure of 134 Xe from Inelastic Neutron Scattering

The level structure of $^{134}\mathrm{Xe}$ was studied with the inelastic neutron scattering reaction followed by $\ensuremath{\gamma}$-ray detection. A number of level lifetimes were determined for the first time with the Doppler-shift attenuation method and the low-lying excited states were characterized. From this new spectroscopic information, the third excited state, a ${0}^{+}$ level which had only been observed in a previous inelastic neutron scattering study, was verified. Reduced transition probabilities were calculated; comparisons were drawn with a vibrational description of the nucleus and found lacking. The ${3}^{\ensuremath{-}}$ octupole phonon has been confirmed, and the complete negative-parity multiplet resulting from the $\ensuremath{\nu}(1{h}_{11/2}2{d}_{3/2})$ configuration has also been tentatively identified for the first time in the $N=80$ isotones.