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Chirality in nuclear structure: An experimental view into underlying symmetries

Abstract : The experimental information on the observed nearly degenerate bands in the N = 75 isotones, in particular 134Pr, which is considered as the best candidate for chiral bands, if critically analyzed, shows that most properties of the bands, in particular the recently measured branching ratios and lifetimes, are in clear disagreement with the interpretation of the two bands as chiral bands. For I = 14 - 18 in 134Pr, where the observed energies are almost degenerate, a value of 2.0(4) for the ratio of the transition quadrupole moments of the two bands was obtained, which implies a considerable difference in the nuclear shape associated with the two bands. The insufficiency of the near-degeneracy criterion to trace nuclear chirality is clearly emphasized.
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C.M. Petrache. Chirality in nuclear structure: An experimental view into underlying symmetries. International Conference on Frontiers of Nuclear Structure, Jun 2006, Shangai, China. pp.1897-1898, ⟨10.1142/S0218301306005320⟩. ⟨in2p3-00134449⟩

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