Based on the group - theoretical structure for the density - dependent multi - photon jaynes - cummings model , we have constructed the dressed su ( 2 ) coherent state . the atom and field squeezing and the anti - bunching effect for the system evolving from the dressed su ( 2 ) coherent state have been studied . in conclusion , we have discovered some new field and atomic squeezing in different systems , proposed a new kind of quantum state and discussed photon anti - bunching effect , sub - poissonian statistics distribution 5 .基于密度相关的多光子j那mes一c ~ gs模型的群结构，定义了密度相关的多光子jaynes一c ~ gs模型的修饰su ( 2 )相干态，并研究了系统以修饰su ( 2 )相干态作为初态的原子和光场的压缩，光子的反聚束等效应。
In chapter five , the rempi - tof - ms of methanol are investigated in the range of 279 . 5 - 286 . 5nm . the main results are : ( 1 ) the tof - ms and rempi spectrum of methanol are measured . ( 2 ) the tof - ms of methanol is identified ; the rempi spectrum of c , ch3 and ch2o are analyzed 第五章主要报道了甲醇分子在279 . 5一286 . 5nm范围内的共振增强多光子解离一电离过程的实验研究结果和分析结果，主要内容有: ( 1 )实验测定了甲醇分子的共振增强多光子电离的tof质谱和分质量的rempi谱。
( 2 ) the tof - ms of acetaldehyde is identified ; the rempi spectra of c , ch , and ch3 are analyzed . ( 3 ) the possible mechanism of dissociation / ionization is analyzed , ( 4 ) it is also proposed that the main dissociation channel is non - resonant photodissociation of parent molecule followed by the further photodissociation or photoionization of the fragments ( 3 )通过对实验测定的tof质谱和分质量的rempi一谱的分析，讨论了乙醛分子的多光子共振解离一电离通道以及碎片的解离通道，分析结果表明乙醛分子的主要解离通道是该分子先多光子解离，然后是解离碎片的进一步解离或多光子电离。
