Universal relation between spectroscopic constants

Pramana

Sarvpreet Kaur¹  C G Mahajan1¹ 

[1] Department of Physics, Centre for Advanced Study in Physics, Panjab University, Chandigarh 160 014, India$$

关键词: Sutherland parameter;    dissociation energy;    alkali diatomic molecules;    𝑆2 molecule.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

A universal relation between the Sutherland parameter, 𝛥(= 𝑘𝑒$r^{2}_{e}$/2𝐷𝑒) and the dimensionless parameter 𝐺 (= 8𝜔𝑒𝑥𝑒/𝐵𝑒), has been established using 40 electronic states, which include ground as well as excited states of polar and non-polar molecules. This relation is used to predict the dissociation energy of four lowest electronic states of 𝑆2 molecule. The respective values for the states 𝑋3$𝛴^{-}_{g}$, 𝑎1𝛥𝑔, 𝑏1$𝛴^{+}_{g}$ and 𝐵3$𝛴^{-}_{u}$ turn out to be 36557, 31431, 28247 and 13429 cm-1, and are in good agreement with the experimental values. Furthermore, metastable states 𝑎1𝛥𝑔 and 𝑏1$𝛴^{+}_{g}$ of 𝑆2 are shown to dissociate into 3𝑃1+3𝑃1 as against the dissociation of 𝑋3$𝛴^{-}_{g}$ into 3𝑃2+3𝑃1. In addition, a relation between Sutherland parameter 𝛥 and internuclear distance 𝑟𝑒, viz., 𝛥 = 2.2𝑟𝑒 has been obtained for the ground state of alkali diatomic molecules.

【 授权许可】

Unknown