【摘要】 利用差分速度调制分子离子激光光谱技术，首次测量了 ＣＯ^＋彗尾带系（Ａ^２Π－Ｘ^２∑^＋）（２，３）弱带转动吸收光谱，通过对测量谱线的标识，获得了两态的分子常数，其中下态ｖ^＂＝３的常数未见有文献报导。在锁相放大器１ｓ积分时间下，实验系统的吸收测量灵敏度实测为 １．５６ ｘ １０^－６。更多还原

【Abstract】 Using differential velocity-modulation spectroscopic technique, the Doppler-limited rotational absorption spectra of the weak band （2, 3） in the Comet-tail system （A²Π-X²∑⁺） of CO⁺ were measured. The assignment was made for all the observed spectra. Furthermore the effective molecular constants of the states involved in the transition were obtained, and the constants of the lower state v" =3 were reported for first time as to our knowledge. The absorption sensitivity of the experimental sytem was measured to be 1.56 x 10^-6 under the 1 s lock -in amplifier integration time.更多还原