摘要
利用积分时间分辨荧光方法研究了KH(X1Σ+,v=0-3)与H2之间的振动碰撞能量转移。在K-H2混合样品池中,脉冲激光(泵浦激光)双光子激发K原子至6S态,K(6S)与H2反应生成KH(X1Σ+,v=0-3)分子,利用另一脉冲激光(检测激光)激发X1Σ+至A1Σ+态,通过测量0-100μs延迟时间内各振动态的时间分辨激光感生荧光光谱(LIF)强度,通过速率方程分析和谱线轮廓积分方法,得到了KH(X1Σ+,v=0-3)与H2之间的振动能级转移速率系数分别为(2.1±0.4)×1013cm3.s1for v=1→v=0,(6.5±1.2)×1013cm3.s1for v=2→v=1和(8.9±1.6)×1013cm3.s1v=3→v=2.同时得到扩散系数为(1.3±0.2)×104s1.
The vibrational energy transfer from KH（X^1∑^＋,v=0.3） to H2 was studied by the integrated time-resolved laser-induced fluorescence（LIF） technique. The vibrational levels of KH（X^1∑^＋,v=0.3） generated in the reaction of K（6S） and H2 at a temperature of 500K were selectively detected by the LIF technique. The time-resolved LIF-excited X^1∑^＋→A^1∑^＋system in the presence of H2 has been recorded with the delay time from 0 to to 100μs. The rate coefficients can be determined by the rate equations and the integrated profiles method （IPM）. The rate coefficients are （2.1±0.4）×10^-13cm^3·s^-1for v=1→v=0,（6.5±1.2）×10^-13cm^3·s^-1for v=2→v=1 and （8.9±1.6）×10^-13cm^3·s^-1v=3→v=2,respectively. The diffusion rate is （1.3±0.2）×10^4s^-1.
出处
《新疆大学学报（自然科学版）》
CAS
2013年第2期133-137,143,共6页
Journal of Xinjiang University(Natural Science Edition)
基金
Granted by the National Natural Science Foundation of China(11065009)
关键词
振动能量转移
时间分辨荧光
谱线轮廓积分方法
速率系数
KH
vibrational energy transfer
time-resolved fluorescence
integrated profiles method
rate coefficient
KH
