Critical behaviour in nuclear structure from spherical to axially symmetric deformed shape in IBM |
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Authors: | Zhang Jin-Fu L Li-Jun Bai Hong-Bo |
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Institution: | Department of Physics, Chifeng College, Chifeng 024001, China |
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Abstract: | To compare with the predictions of the transitional
dynamical symmetry X(5)
proposed by Iachello (2001 Phys. Rev. Lett. 87 052502), the critical
behaviours of U(5)--SU(3) are studied in the space of two control
parameters in the interacting boson model (IBM). A simple-shaped phased diagram
has been presented. It is found that X(5) predictions cannot be exactly
reproduced by our calculations and that the best agreement is close to the
calculations with boson numbers N = 11 and 12. By comparing with experimental
data on X(5)-like nuclei, we find that X(5) predictions and IBM
calculations can reproduce the energy ratios and E2 transition ones. |
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Keywords: | nuclear structure critical behaviour X(5) nuclei IBM |
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