Zhang Gui-yin, Zhang Lian-shui, Sun Bo, Han Xiao-feng
Institute of Physics Science and Technology, Hebei University, Baoding 071002, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2005 Jun;25(6):854-6.
Under the conditions of room temperature and low pressure, laser-induced fluorescence excitation spectrum of NQ2 in the wavelength region of 440-495 nm was obtained by using optical parameter generator (OPG) and amplifier (OPA) as an excitation source. The OPG/OPA was pumped by a Nd:YAG laser. The peaks of the spectrum are attributed to B2B1 <-- X2A1 transition. The angle-vibration frequency of B2B1 electronic state was calculated. The fluorescence lifetime of B2B1 (0, 9, 0) vibration state under the pressure of 15 Pa was also deduced by measuring the fluorescence time decay spectrum of this state. It is about 49 micros. Fitting the curve the fluorescence radiant lifetime versus pressure, the spontaneous radiant lifetimes tau0 and the rate coefficient kq of non-radiant transition relaxation of B2B1 (0, 9, 0) state are deduced. The results are: tau approximately 55 micros and k(q) = 1.2 x 10(-9) cm3 molecule(-1) s(-1).
在室温和低压条件下，以光学参量发生器（OPG）和放大器（OPA）作为激发源，获得了NQ2在440 - 495 nm波长范围内的激光诱导荧光激发光谱。OPG/OPA由Nd:YAG激光器泵浦。该光谱的峰值归因于B2B1 <-- X2A1跃迁。计算了B2B1电子态的角振动频率。通过测量该状态的荧光时间衰减光谱，还推导了15 Pa压力下B2B1(0, 9, 0)振动态的荧光寿命。其约为49微秒。拟合荧光辐射寿命与压力的曲线，推导了B2B1(0, 9, 0)态的自发辐射寿命tau0和非辐射跃迁弛豫的速率系数kq。结果为：tau约为55微秒，k(q)=1.2×10^(-9) cm³分子⁻¹ s⁻¹。
