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Chin. Phys. B, 2008, Vol. 17(12): 4504-4509    DOI: 10.1088/1674-1056/17/12/029
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

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

Zhang Hong-Ying (张洪英), Lu Zhen-Zhong (鲁振中), Fan Rong-Wei (樊荣伟), Chen De-Ying (陈德应)
National Key Laboratory of Tunable Laser Technology, Institute of Opto-Electronics, Harbin Institute of Technology, Harbin 150001, China
Abstract  This paper proposes a novel one-color 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 ~440nm. 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 ~440nm 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.
Keywords:  laser induced collision      ionization      four-photon resonant excitation      time-of-flight mass spectrometry  
Received:  23 April 2008      Revised:  03 June 2008      Accepted manuscript online: 
PACS:  32.80.Rm (Multiphoton ionization and excitation to highly excited states)  
  07.57.-c (Infrared, submillimeter wave, microwave and radiowave instruments and equipment)  
  32.70.Jz (Line shapes, widths, and shifts)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos 10674036 and 10774033), Program for New Century Excellent Talents in University, and Program of Excellent Team in Harbin Institute of Technology.

Cite this article: 

Zhang Hong-Ying (张洪英), Lu Zhen-Zhong (鲁振中), Fan Rong-Wei (樊荣伟), Chen De-Ying (陈德应) Xe-Kr laser induced collisional ionization system and experimental preparation of its initial state: Four-photon resonant excitation 2008 Chin. Phys. B 17 4504

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