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Issue 46, 2015
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Dissociative ionization and Coulomb explosion of ethyl bromide under a near-infrared intense femtosecond laser field

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Abstract

The multi-photon dissociation and Coulomb explosion of ethyl bromide C2H5Br under near-infrared (800 nm) femtosecond laser field are experimentally investigated by a DC-sliced ion imaging technique. The sliced images of fragment ions C2H5+, Br+, CH3+, CH2Br+, H2+ and C2H3Br+ are obtained, and their dissociative pathways are assigned by observing their corresponding kinetic energy release (KER) and angular distribution. It is shown that low-KER components of these fragment ions result from multi-photon dissociation of singly charged parent ion C2H5Br+, while high-KER components come from Coulomb explosion of doubly charged parent ion C2H5Br2+. It is also shown that the precursor species [C2H5+…Br+] has a longer lifetime than [C2H3Br+…H2+] and [CH3…CH2Br+]. In addition, the probable H2 and H2+ elimination channels are theoretically simulated by Gaussian 09 software packages, and the results show that the former is an asynchronous process while the latter is a synchronous process.

Graphical abstract: Dissociative ionization and Coulomb explosion of ethyl bromide under a near-infrared intense femtosecond laser field

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Publication details

The article was received on 07 Feb 2015, accepted on 17 Apr 2015 and first published on 17 Apr 2015


Article type: Paper
DOI: 10.1039/C5RA02383A
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RSC Adv., 2015,5, 37078-37084

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    Dissociative ionization and Coulomb explosion of ethyl bromide under a near-infrared intense femtosecond laser field

    C. Teng, H. Wu, J. Zhang, Y. Yang, T. Jia, S. Zhang and Z. Sun, RSC Adv., 2015, 5, 37078
    DOI: 10.1039/C5RA02383A

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