423—475nm的激光作用下呋喃分子的多光子电离离解研究

STUDY OF MULTIPHOTON IONIZATION DISSOCIATION PROCESSES OF FURAN IN THE WAVELENGTH REGION 423—475nm

在波长为 4 2 3— 4 75nm的激光作用下对呋喃分子的多光子电离离解过程进行了研究 .在此实验波段内 ,呋喃分子主要经历的是 ( 3 +1)多光子过程 .得到了呋喃分子的共振多光子电离分质量谱以及离子强度与激光强度的关系 .对共振多光子电离谱峰进行了里德堡态标识 .

The processes of multiphoton ionization (MPI) dissociation of furan have been studied in the wavelength region of 423—475?nm.The furan molecules are firstly 3\|photon resonantly excited, and then get ionized by further one\|photon absorption.The mass resolved MPI spectrum and the relation between ion current and laser intensity have been obtained. A few peaks in the MPI spectrum have been assigned to the transitions from the ground state to 4d,4f,6f and 7f Rydberg states.