Rotational Structure of T=0 and T=1 bands in the N=Z Nucleus 62Ga

A bstract: Therotationalbehaviorof T = 0and T = 1bandsin theodd-odd N = Z nucleus 62 G a isstudied theoretically using thesphericalshellm odel(laboratory fram e) and the cranked N ilsson-Strutinsky m odel (intrinsic fram e). Both m odels give a good description ofavailable experim entaldata. The role ofisoscalar and isovector pairing in the T = 0 and T = 1 bandsasfunctionsofangularm om entum isstudied in theshellm odel.Theobserved backbending in the T = 0 band isinterpreted asan unpaired band-crossingbetween two con(cid:12) gurationswith di(cid:11) erentdeform ation.Thetwo con(cid:12) gurations di(cid:11) er by 2p-2h and are found to term inate the rotationalproperties at I (cid:25) = 9 + and I (cid:25) = 17 + ,respectively. E 2-decay m atrix elem ents and spectroscopic quadrupole m om ents are calculated. From the CN S calculation,supported by shell m odelresults,it is suggested that the low spin parts ofthe bands with T = 0 and T = 1 correspond to triaxially deform ed stateswith the rotation taking place around the shortest axis (positive (cid:13) ) and interm ediate axis (negative (cid:13) ),respectively. At lower spinsthe con(cid:12) guration space pf 5 = 2 g 9 = 2 ,used in the shellm odelcalculation,is found su(cid:14) cientwhile also f 7 = 2 becom esim portantabove the backbending.