Xe-Kr laser induced collisional ionization system and experimental preparation of its initial state: Four-photon resonant excitation

作     者：张洪英 鲁振中 樊荣伟 陈德应 

作者机构：National Key Laboratory of Tunable Laser Technology Institute of Opto-ElectronicsHarbin Institute of Technology 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2008年第17卷第12期

页      面：4504-4509页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos 10674036 and 10774033) Program for New Century Excellent Talents in University Program of Excellent Team in Harbin Institute of Technology 

主　　题：laser induced collision ionization four-photon resonant excitation time-of-flight mass spectrometry 

摘      要：This paper proposes a novel one-colour Xe-Kr laser induced collisional ionization system. Considering the level scheme of the system, it finds that the initial state of the reaction--the four 4f levels with even J of Xe-can be prepared through method of four-photon resonant excitation by dye laser with wavelength of -440 nm. Absorption of an additional photon （the transfer laser） of the same wavelength will complete the laser induced collisional ionization process. The resonance enhanced ionization spectrum of Xe by four laser photons at -440nm is measured through time-of-flight mass spectrometry, this aims at the preparation of the initial state of the system proposed. The Stark broadening of the measured spectrum is observed and consistent with the previous study. Analysis of the measured resonance ionization spectrum implies the feasibility of -440 nm four-photon resonant excitation of the initial 4f state of the Xe Kr system proposed in this paper, which prepares for a further experiment of laser induced collisional ionization.