期刊
CHEMICAL PHYSICS LETTERS
卷 799, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.cplett.2022.139642
关键词
Diatomic molecule; Potential curve; Ground state; Rovibrational states
The translated text presents an analytic Born-Oppenheimer potential curve for the ground state X1 sigma+ of the molecule ClF, supporting 5719 rovibrational states including weakly-bound states. It predicts a van der Waals constant of approximately 29.3 a.u.
Following the first principles the analytic Born-Oppenheimer (BO) potential curve for the ground state X1 sigma+ of the molecule ClF is proposed for whole range of internuclear distances R is an element of [0, infinity). It is based on matching the perturbation theory at small internuclear distances R and multipole expansion at large distances R, it has the form of two-point Pade approximant and provides 3-4 figures in rovibrational energies. It supports 5719 rovibrational states with maximal vibrational number nu(max)= 47 and maximal angular momentum L-max = 210 including 36 weakly-bound states close to threshold (to dissociation limit) with the energies <= 10(-4) hartree. The van der Waals constant C-6((ClF)) similar to 29.3 a.u. is predicted.
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