Orateur
Description
Very neutron-deficient isotopes were studied by means of in-beam gamma-ray spectroscopy, beta-decay spectroscopy, alpha-decay spectroscopy and isomeric-decay spectroscopy. The experiments were performed at ISOLDE and at cyclotron laboratory of the University of Jyväskylä. Unprecented rotational bands, based on 1h$_{11/2}$ proton-hole configurations, coupled with intruder 0⁺ states in even-even Hg cores, were identified in $^{177,179}$Au. Their band-heads de-excite with transitions that might have significant E0 components, although they were not unambiguously identified. In addition to that, in $^{179}$Au, two coexisting 9/2$⁻$ states connected with transition with possible E0 component were identified. They are based on coupling of 1h$_{9/2}$ proton-intruder configurations with two 0⁺ states in the $^{180}$Hg core.
