中文摘要：

利用相干反斯托克斯拉曼谱（CARS）分析了H2在与Na2（A1∑＋u）碰撞后的振转态布居数分布。扫描CARS表明了在能量转移过程中H2在V=1,2,3振动能级上得到布居。由扫描CARS的峰值得到2个可能的布居数比值,通过解速率方程组及时间分辨CARS轮廓模拟,确定实际的布居数比n1/n2为1.82,得到了在能量转移中H2在V=1,2,3振动能级上的布居数之比为0.53：0.30：0.17。平均转移能量分配的相对值〈ft〉,〈fv〉,〈fr〉分别为0.51,0.46,0.03,能量主要配置在振动和平动上,支持Na2-H2的直线式碰撞传能机制。

英文摘要：

Coherent anti-Stokes Raman spectroscopy（CARS） has been used to analyze the internal state distribution of H2 after energy transfer with Na2（A1∑＋u）.The scanned CARS reveals that during energy transfer processes H2 molecules are produced at the V=1,2 and 3 vibrational levels.Two possible populations ratios（n1/n2） are obtained from scanned CARS peaks.The actual population ratio n1/n2 is determined to be 1.82 through shape simulations of the time resolved CARS profiles under a kinetic model.The n1/n2 ratio indicates that the H2 molecules produced by the energy transfer process are 0.53 populated at the V=1 level,0.30 at V=2 and 0.17 at V=3.The relative fraction（〈ft〉,〈fv〉,〈fr〉） of average energy disposal is derived as 0.51,0.46,0.03,which has a major energy releases in vibrational and translational.This consequence supports the collinear collision geometry in ratio Na2-H2 energy transfer.