Analytical description of the coherent state model for near vibrational and well deformed nuclei

作者：Raduta A A^*; Budaca R; Faessler Amand

来源：Annals of Physics, 2012, 327(3): 671-704.

DOI：10.1016/j.aop.2011.10.004

• Coherent state model
• Rotational band
• Phase transition
• Critical point
• Electric quadrupole transition probability
• Excitation energy

Analytical formulas for the excitation energies as well as for the electric quadrupole reduced transition probabilities in the ground, beta and gamma bands were derived within the coherent state model for the near vibrational and well deformed nuclei. Numerical calculations were performed for 42 nuclei exhibiting various symmetries and therefore with specific properties. Comparison of the calculation results with the corresponding experimental data shows a good agreement. The parameters involved in the proposed model satisfy evident regularities being interpolated by smooth curves. Few of them, which fall out of the curves, are interpreted as signatures for a critical point in a specific phase transition. This is actually supported also by the figures showing the excitation energy dependence on the angular momentum. The formulas provided for energies and B(E2) values are very simple, being written in a compact form, and therefore easy to be handled to explain the new experimental data.

• 出版日期2012-3