中文摘要：

在激进的隧道 CH3+HCO 的乙醛的光致离解动力学是用在 275321 nm 的光分解作用波长范围的 time-sliced 速度地图成像技术的 reinvestigated。CH3 碎片被探查了经由(2+1 ) 提高回声的 multiphoton 电离。图象为在地面和激动的状态形成的 CH3 被测量(v 2=0 并且 1 ) 伞震动的模式。为在从 S1 状态交叉的 intersystem 以后的 T1 状态上的乙醛分离，产品与高翻译的精力版本和低内部刺激被形成。两碎片的旋转、震动的精力与增加光致离解精力增加。三位字节障碍高度在 3.881 点被估计吗？？

英文摘要：

The photodissociation dynamics of acetaldehyde in the radical channel CH3＋HCO has been reinvestigated using time-sliced velocity map imaging technique in the photolysis wavelength range of 275-321 nm. The CH3 fragments have been probed via （2＋1） resonance-enhanced multiphoton ionization. Images are measured for CH3 formed in the ground and excited states （v2=0 and 1） of the umbrella vibrational mode. For acetaldehyde dissociation on T1 state after intersystem crossing from S1 state, the products are formed with high translational energy release and low internal excitation. The rotational and vibrational energy of both fragments increases with increasing photodissociation energy. The triplet barrier height is estimated at 3.8814-0.006 eV above the ground state of acetaldehyde.