Structure of high-spin states in 100Pd

Abstract High-spin states of the neutron deficient 100 Pd nucleus have been investigated via the 50 Cr( 58 Ni, 4p α ) and 70 Zn( 36 S,6n) heavy-ion induced reactions. For the detection of evaporated particles and γ rays the Nordball array equipped with ancillary detectors and the Eurogam II detector system were utilized. By the use of in-beam spectroscopic methods 89 transitions belonging to 100 Pd have been observed, 49 of which were identified for the first time. The level scheme has been extended up to E x ≈16 MeV excitation energy and I≈25 ℏ . The experimental results were compared with the predictions of cranked shell model calculations. Maximal spin alignments were found in the (πg 9/2 ) −4 12 + (νd 5/2 ,g 7/2 3 h 11/2 ) 13 − and (πg 9/2 −3 p 1/2 ) 11 − (νd 5/2 ,g 7/2 3 h 11/2 ) 13 − configurations. Possible existence of octupole correlations is discussed on the basis of B( E 1)/B( E 2) values deduced for the decays of high-spin levels in the yrastnegative-parity band.