High-spin structure and band termination in {sup 103}Cd

Excited states of the neutron-deficient {sup 103}Cd nucleus have been investigated via the {sup 72}Ge({sup 35}Cl, p3n) reaction at beam energy of 135 MeV by use of in-beam spectroscopic methods. Gamma rays depopulating the excited states were detected using the Gammasphere spectrometer with high-fold {gamma}-ray coincidences. A quadrupole {gamma}-ray coincidence analysis ({gamma}{sup 4}) has been used to extend the known level scheme. The positive-parity levels have been established up to J=35/2({Dirac_h}/2{pi}) and E{sub x}=7.071 MeV. In addition to the observation of a highly fragmented level scheme belonging to the positive-parity sequences at E{sub x}{approx}5 MeV, the termination of a negative-parity sequence connected by E2 transitions has been established at J=47/2({Dirac_h}/2{pi}) and E{sub x}=11.877 MeV. The experimental results corresponding to both the positive- and negative-parity sequences have been theoretically interpreted in the framework of the core particle coupling model. Evidence is presented for a shape change from collective prolate to noncollective oblate above the J{sup {pi}}=39/2{sup -} (8011-keV) level and for a smooth termination of the negative-parity band.