Center for Theoretical Chemical Physics -aboratory of Molecular Catalysis Innovative Material Electronic,Vibrational and Rotational Energy Level q1=gfee∑gigie-+e) Electronic transition Excited electronic (in optical state. or uv) dissociation energy X6Jau Grou g0=gieBe5Σs6giebe6+e6 Rotational Vibrational transition transition (in microwave) (in infrared) 9=90+91+.. Internuclear separation 李振华制 2013/10/14 统计热力学第六章 9李 振 华 制 2013/10/14 统计热力学第六章 9 造 Electronic, Vibrational and Rotational Energy Level        ( ) 1 1 1 1 1 1 1 e r v q g e g g e e r v        ( ) 0 0 0 0 0 0 0 e r v q g e g g e e r v q  q0  q1 