On the enhanced E 1 transitions in the K = 3 / 2 parity doublet band in 223
نویسندگان
چکیده
We have applied the fast timing βγγ(t) technique to remeasure lifetimes of selected states in Ra populated in the β− decay of Fr. T1/2 = 587(12) ps and 210(13) ps have been obtained for the 3/2− and 5/2− states at 50.1 and 79.7 keV, that are more accurate than the previous values of 630(70) ps and 166(55) ps, respectively. Our |D0| value of 0.155(10) e·fm obtained for the K = 3/2 configuration together with the available values of |D0| for the K = 1/2 and K = 5/2 parity doublet bands establish the configuration dependence of |D0| at low spins in this nucleus. Results of theoretical calculations performed for Ra, using the quasiparticle-phonon model (QPM) with inclusion of the Coriolis coupling, reasonably well reproduce octupole correlations in this nucleus.
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