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首页> 外文期刊>Physical review, C >Beyond-mean-field effects on nuclear triaxiality
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Beyond-mean-field effects on nuclear triaxiality

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The beyond-mean-field effects on nuclear triaxiality are studied by applying the projected total energy surface (PTES) calculations to the light tungsten isotopes W170-178, which have been well described as prolate rotors within the mean-field approximation. The present PTES calculations have well reproduced the experimental energies of the yrast states and the available experimental transition quardrupole moment (Q(t)) in function of spin. In particular, the results present a considerable large triaxiality for their ground states, with an average triaxial deformation gamma similar to 15 degrees. For a comparison, the total Routhian surface calculations have also been performed for these nuclei, the results show a well-established axial quadrupole deformation in their ground states. The presence of the significant triaxial deformation can be attributed to the beyond-mean-field effect as the angular momentum projection. This effect is therefore essential for a variety of mean-field approaches since it is only associated with the necessary restoration of the rotational symmetry in the laboratory frame, which is spontaneously broken in the intrinsic frame.

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