【摘要】 利用脉冲高压直流放电技术产生■H超声分子束,以纳秒染料激光二倍频输出(282 nm)作为激发光源,通过LIF光谱测量方法,获得了O.HA2Σ+-X2Π(1,0)带转动分辨激发荧光谱,并通过对谱线强度分布的分析和计算,得到X2Π态O.H的转动温度为(30±1)K;通过对A2Σ+-X2Π(1,1)带及(0,0)带跃迁的荧光衰减时间谱测量,拟合得出O.H激发态A2Σ+(v′=1)及X2Π(v″=0)的寿命分别为(637±6)和(675±13)ns。更多还原

【Abstract】 Hydroxyl radical molecular beam was generated by DC pulsed high voltage discharge.The rotational resolution excitation fluorescence spectra of the ■H A 2Σ+-X 2Π(1,0) band were observed by using second harmonious output of a nanosecond dye laser(around 282 nm).The rotational temperature of the(1,0) band was determined to be(30±1) K based on the analysis of the intensity distribution of the O·H spectra.Moreover,the fluorescence decay curves of the(1,1) band and the(0,0) band and were obtained and the fluorescence lifetimes of A 2Σ+(v′=1) state and the X 2Π(v″=0) state were fitted to be(637±16) and(675±13) ns,respectively.更多还原