NO2分子519～524 nm区的激光诱导荧光激发谱

实验测定了室温下NO2分子在519～524nm区域的高分辨激光诱导荧光激发谱，标识了25个振动带，并作了转动分析，确定了这些带的带源、转动常数以及旋-转偶合常数等分子常数，其中有8个振动带是新发现的，对振动带的转动结构分析表明，所有得到转动标识的谱线均属于平行跃迁2B2-2A1，其中上振动能级具有B2对称类是由于电子激发态2B2与电子基态的振动能级之间的强烈相互作用所致。

Laser-induced fluorescence excitation spectrum of NO2 in the region519

The high-resolution fluorescence excitation spectrum was measured in the region 519～524 nm at room temperature. Though the spectrum is rather congested， we determined the molecular constants such as band origins and rotational and spin-rotation constants for 25 vibronic bands in the this region. Among the vibronic bands assigned there were 8 new bands reported firstly. All rotational structures analyzed are of the parallel type. It was shown from the experiment that the high lying vibration levels of ground state AX～U62A1 heavily perturbed the electronic excited state AA～U62B2.