根据不同的压力关系,指出分子的红外多光子解离(或反应)可分为两类:一炎遵循单分子解离规律,如SF_6,Freon类等分子;另一类遵循双分子反应规律,如甲醛,甲醇,乙醇等分子。讨论了发生这种差别的原因。 According to the different pressure relations, it is pointed out that the infrared multi-photon dissociation (or reaction) of molecules can be divided into two types: one inflammation follows single molecule dissociation law, such as SF_6, Freon and other molecules; the other follows the law of bimolecular reaction, Such as formaldehyde, methanol, ethanol and other molecules. The reason for this difference is discussed.