DESCRIPTION OF ROTATIONAL MOLECULAR-SPECTRA BY THE QUANTUM ALGEBRA SUQ(2)

Rotational spectra of diatomic molecules can be described by the quantum algebra SU(q)(2). Stretching effects are taken into account by algebra to deviate slightly from the normal SU(2) form. The two-parameter formula given by the algebra is equivalent to an expansion in terms of powers of J(J+1), and can be used for partially summing up the Dunham expansion for rotation-vibration molecular spectra.