Abstract.
We have applied the fast timing \( \beta\gamma\gamma (t)\) technique to remeasure lifetimes of selected states in 223Ra populated in the \( \beta^{-}\) decay of 223Fr. \( T_{1/2}=587(12)\) 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 \( \vert D_{0}\vert\) value of 0.155(10)e·fm obtained for the \( K=3/2\) configuration together with the available values of \( \vert D_{0}\vert\) for the \( K=1/2\) and \( K=5/2\) parity doublet bands establish the configuration dependence of \( \vert D_{0}\vert\) at low spins in this nucleus. Results of theoretical calculations performed for 223Ra, using the quasiparticle-phonon model (QPM) with inclusion of the Coriolis coupling, reasonably well reproduce octupole correlations in this nucleus.
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Mach, H., Lindroth, A., Ruchowska, E. et al. On the enhanced E1 transitions in the K = 3/2 parity doublet band in 223Ra. Eur. Phys. J. A 52, 172 (2016). https://doi.org/10.1140/epja/i2016-16172-4
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DOI: https://doi.org/10.1140/epja/i2016-16172-4