The difference between the internuclear separtions in the A0 + and A0 - states has been achieved from the vibrational excitation spectrum of ZnHg excimers and Franck Condon factor calculation.

• 由振动激发谱的强度分布和跃迁的Franck－Condon因子计算，首次获得亚稳态A0＋和A0－相对平衡核间距。