標題: Experimental and theoretical investigations of ionization/dissociation of cyclopentanone molecule in a femtosecond laser field
作者: Wang, Qiaoqiao
Wu, Di
Jin, Mingxing
Liu, Fuchun
Hu, Feifei
Cheng, Xihui
Liu, Hang
Hu, Zhan
Ding, Dajun
Mineo, H.
Dyakov, Y. A.
Mebel, A. M.
Chao, S. D.
Lin, S. H.
應用化學系
Department of Applied Chemistry
公開日期: 28-Nov-2008
摘要: The ionization/dissociation mechanism of cyclopentanone has been experimentally investigated in molecular beam by irradiating with intense 394 and 788 nm laser fields with pulse duration of 90 fs. The range of laser intensities varied from 3 X 10(13) to 4 X 10(14) W/cm(2). For both wavelengths, the singly charged parent ion is observable while the doubly charged one cannot be found easily, although the fragmentation pattern supports its presence. Meanwhile, the extent of fragmentation at 788 nm is less than that in the 394 nm case. We quantitatively analyze the ionization processes of cyclopentanone in intense femtosecond laser by comparing the calculation results of ionization rate constants obtained from Ammosov-Delone-Krainov, Keldysh, and Keldysh-Faisal-Reiss (KFR) theories based on hydrogenlike atom model. We also compare the experimental and theoretical results; the generalized KFR theory is found to be useful in predicting the ionization yields of singly and doubly charged cyclopentanone ion. To interpret the dissociation patterns of the cyclopentanone ions, we have used the Rice-Ramsperger-Kassel-Marcus theory with the potential surfaces obtained from the ab initio quantum chemical calculations. (c) 2008 American Institute of Physics.
URI: http://dx.doi.org/10.1063/1.3006028
http://hdl.handle.net/11536/8129
ISSN: 0021-9606
DOI: 10.1063/1.3006028
期刊: JOURNAL OF CHEMICAL PHYSICS
Volume: 129
Issue: 20
結束頁: 
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