Dissociative double ionization of 1-bromo-2-chloroethane irradiated by an intense femtosecond laser field.

Yan Yang, Lulu Fan, Shengzhi Sun, Jian Zhang, Yuting Chen, Shian Zhang, Tianqing Jia, Zhenrong Sun

Index: J. Chem. Phys. 135(6) , 064303, (2011)

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Abstract

The dissociative double ionization and multi-photon ionization of 1-bromo-2-chloroethane (BCE) irradiated by the 800 nm femtosecond laser field have been investigated by dc-slice imaging technology. The charged parent ion ratio [BCE(2+)]/[BCE(+)] was measured, and the corresponding ionization process including non-sequential double ionization and sequential double ionization was analyzed. The sliced images of different photo-dissociated ions were detected, and the corresponding kinetic energy release (KER) distributions were calculated and extracted. Furthermore, the dissociative double ionization channels, attributed to the cleavage of the C-C, C-Br, and C-Cl bonds by the Coulombic repulsive forces, were discussed, and the revised equilibrium distance R(e)*, the energy ratio E(exp)/E(coul), and the value a=√(R(e)*)/(E(exp)/E(coul)) were calculated.