High-spin states in the odd-proton nucleus Pm-135

High-spin states in the odd-proton nucleus Pm-135 have been investigated us ing the Ag-107(S-32, 2p2n)Pm-135 reaction. Seven rotational bands have been observed in 135Pm. The yrast band based on a decoupled h(11/2) proton is f ound to have a band crossing in omega (c) similar to 0.43MeV/h. Two positiv e-parity bands based on the two signature components of the pig(7)/25/2(+)[ 413] Nilsson orbital have been observed in the main sidebands. The favoured band with (pi,alpha) = (+, -1/2) has been shown to populate below the firs t pair of proton alignment. Both bands have shown upbend at omega (1) simil ar to 0.26 MeV/h and omega (2) similar to 0.43 MeV/h. These crossing freque ncies can be attributed to the decoupling of the first pair of h(11/2) quas i-proton and h(11/2) quasi-neutron, respectively: Four weaker bands have be en observed in sidebands too. Among them, two states are possibly built on a pid(5/2)3/2(+)[411] configuration.