| D. C. Biswas, A. G. Smith, R. M. Wall, D. Patel, G. S. Simpson, D. M. Cullen, J. L. Durell, S. J. Freeman, J. C. Lisle, J. F. Smith, B. J. Varley, T. Yousef, G. Barreau, M. Petit, Ch. Theisen, E. Bouchez, M. Houry, R. Lucas, B. Cahan, A. Le Coguie, B. J. P. Gall, O. Dorvaux, and N. Schulz |
Lifetimes of excited states have been measured for the positive-parity rotational bands in neutron-rich 142,144Ba as well as the 7- and 9- states of the negative-parity band in 144Ba using the differential Doppler shift method. The deduced quadrupole moment, Qt, of the positive-parity band decreases with angular momentum and overall shows good agreement with earlier measurements. The measured lifetimes of 7- and 9- states are used to determine the electric dipole moment, D0 = 0.17(3) and 0.09(1) e fm, respectively, in the negative-parity octupole band of 144Ba. |
