Yrast spectroscopy in the neutron-deficient nucleus<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow/><mml:mrow><mml:mn>169</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">Os</mml:mi></mml:math>

Excited states in the neutron-deficient isotope ${}^{169}\mathrm{Os}$ have been identified for the first time in an experiment using the Jurosphere $\ensuremath{\gamma}$-ray spectrometer in conjunction with the Ritu gas-filled recoil separator. The problems associated with identifying neutron-deficient isotopes produced with low fusion cross sections against a high background of competing channels, including fission, have been overcome by using the recoil-decay tagging technique. The band structures observed in ${}^{169}\mathrm{Os}$ are interpreted in the context of the systematics of neighboring nuclei and the predictions of cranked Woods-Saxon calculations. The systematics of the second ${(i}_{13/2}{)}^{2}$ neutron alignment in this region are discussed.

Hali tarjima qilinmagan