Yrast spectroscopy in the neutron-deficient nucleus <sup>169</sup>Os
Joss DT., Simpson J., Page RD., King SL., Amzal N., Appelbe DE., Bäck T., Bentley MA., Cederwall B., Cocks JFC., Cullen DM., Greenlees PT., Helariutta K., Jones PM., Julin R., Juutinen S., Kankaanpää H., Keenan A., Kettunen H., Kuusiniemi P., Leino M., Muikku M., Savelius A., Uusitalo J., Warner DD., Williams SJ., Wyss R.
Excited states in the neutron-deficient isotope 169Os have been identified for the first time in an experiment using the Jurosphere γ-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 169Os are interpreted in the context of the systematics of neighboring nuclei and the predictions of cranked Woods-Saxon calculations. The systematics of the second (i13/2)2 neutron alignment in this region are discussed.