TRANSITION QUADRUPOLE-MOMENTS OF HIGH-SPIN STATES IN W-170

Lifetimes of states in W-170 have been measured by the Doppler-shift recoil-distance and Doppler-broadened line-shape (DBLS) methods using the reaction Sn-122(Cr-52, 4n)W-170 at a bombarding energy of 230 MeV. The data were collected in the gamma gamma-coincidence mode in order to reduce the complexities of the gamma-ray spectra and to avoid some of the problems associated with side-feeding to excited states. The experimental transition quadrupole moments, Q(t), cluster around a value of 6 e.b up through spin of I = 24 h. This is the trend predicted by cranked Hartree-Fock-Bogoliubov (HFB) calculations and by the calculated systematics of triaxial-shape-driving forces which originate from the aligned i(13/2) neutron orbitals around N = 96. The interaction strength \V\ between the g- and the s-band extracted from the data is 60 +/- 5 keV. The Q(t) values of several states in the negative-parity band (-, 1) also duster around a value of 6 e.b. The El transition probabilities for the decay of states in the (pi, alpha) = (-, 1) band to states in the ground-state band range between 10(-5) to 3.5 x 10(-4) W.u.. The B(E1, I --> I + 1) is one order of magnitude larger than the B(E1, I --> I - 1). The origin of these effects can probably be understood in terms of a predominant admixture of Coriolis-coupled octupole vibrational-state wave functions in the(-, 1) band of W-170 at low spin.