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International Journal of Modern Physics E 4 (1995) 385-410
An $U_{qp}(u_2)$ Rotor Model for Rotational Bands of Superdeformed Nuclei
R. Barbier1, J. Meyer1, M. Kibler1

A nonrigid rotor model is developed from the two-parameter quantum algebra $U_{qp}({\rm u}_2)$. [This model presents the $U_{qp}({\rm u}_2)$ symmetry and shall be referred to as the qp-rotor model.] A rotational energy formula as well as a qp-deformation of E2 reduced transition probabilities are derived. The qp-rotor model is applied (through fitting procedures) to twenty rotational bands of superdeformed nuclei in the $A \sim 130$, 150 and 190 mass regions. Systematic comparisons between the qp-rotor model and the q-rotor model of Raychev, Roussev and Smirnov, on one hand, and a basic three-parameter model, on the other hand, are performed on energy spectra, on dynamical moments of inertia and on B(E2) values. The physical signification of the deformation parameters q and p is discussed.
1 :  IPNL - Institut de Physique Nucléaire de Lyon
Mathématiques/Algèbres quantiques

Physique/Physique Nucléaire Théorique
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