利用速度调制光谱技术,以N2+为分子探针,研究了N2在不同缓冲气体(氦和氖)下的电离行为.N2+某一振转吸收谱线的强度与速度调制的调制度和N2+浓度成正比,因而通过测量两种缓冲气体下光谱强度,即可推算出相对电离度.
Using N~+_2 as the molecular probe, we investigate the ionization behavior of the nitrogen molecule buffered in different rare gases (helium and neon) by optical heterodyne velocity modulation spectroscopy . The spectral intensity of an individual rovibronic line of N~+_2 is propor tional to the product of the velocity modulation index and the concentration of N~+_2. Therefore, the relative ionization depth can be deduced viameasuring the spectral intensity in different buffer gases.