The dissociative double ionization (DDI) of molecular 1-fluo-2-bromoethane (FBE) in an intense laser field has been investigated by dc-slice imaging technology. The DDI channels involved with dehydrogenation are revealed and it’s believed both the charge distribution and the bound character of real potential energy surfaces of parent ions play important roles in the dissociation process. The relationship between the potential energy surfaces of the precursor species and the photofragment ejection angles are also discussed and analyzed. Furthermore, the competition between the DDI channels has been studied and the C-C bond cleavages dominate the DDI process at relative higher laser intensity.

PACS: 32.80.Fb, 31.50.Df, 82.53.St, 33.15.Fm

通过直流切片成像技术研究了分子1-氟-2-溴乙烷（FBE）在强激光场中的解离双电离（DDI）。揭示了与脱氢有关的DDI通道，并且认为电荷分布和母离子的实际势能面的束缚特征在解离过程中都起着重要作用。还讨论并分析了前体物质的势能表面与光碎片喷射角之间的关系。此外，已经研究了DDI通道之间的竞争，并且在相对较高的激光强度下，CC键断裂主导了DDI过程。

PACS：32.80.Fb，31.50.Df，82.53.St，33.15.Fm