We report the first detection of laser-induced amplified spontaneous emission (LIASE) between the $F{0}_u^{+}\left({}^{3}P_0\right)$ and $E{0}_g^{+}\left({}^{3}P_2\right)$ ion-pair states of Cl₂. Strong UV emission belonging to the $E{0}_g^{+}\left({}^{3}P_2\right)$ – $B{}^3\mathrm{\Pi }(0_u^{+})$ transition was observed upon excitation to single vibronic levels of the $F{0}_u^{+}\left({}^{3}P_0\right)$ state. Only the vibrational levels of the $E{0}_g^{+}\left({}^{3}P_2\right)$ state with a relatively large Franck-Condon overlap between the laser-prepared vibrational levels of the $F{0}_u^{+}\left({}^{3}P_0\right)$ state were found to be generated. The intensity distribution in the corresponding $F{0}_u^{+}\left({}^{3}P_0\right)$ – $E{0}_g^{+}\left({}^{3}P_2\right)$ LIASE spectrum at approximately 5 μm is consistent with the vibrational populations in the $E{0}_g^{+}\left({}^{3}P_2\right)$ state determined by the analysis of the UV fluorescence.

我们报告了第一次检测到激光诱导放大自发辐射 (LIASE) $F{0}_{你}^{+}\left({}^3磷_0\right)$ 和 $乙0_G^{+}\left({}^3磷_2\right)$Cl _{2 的}离子对态。强紫外线发射属于$乙0_G^{+}\left({}^3磷_2\right)$ —— $乙{}^3\mathrm{\Pi }(0_{你}^{+})$ 在激发到单个振动能级时观察到转变 $F{0}_{你}^{+}\left({}^3磷_0\right)$状态。只有振动能级$乙0_G^{+}\left({}^3磷_2\right)$ 激光制备的振动能级之间具有相对较大的 Franck-Condon 重叠的状态 $F{0}_{你}^{+}\left({}^3磷_0\right)$状态被发现生成。对应的强度分布$F{0}_{你}^{+}\left({}^3磷_0\right)$ —— $乙0_G^{+}\left({}^3磷_2\right)$ 大约 5 μm 处的 LIASE 谱与 $乙0_G^{+}\left({}^3磷_2\right)$ 通过紫外荧光分析确定的状态。