Two-body Coulomb explosion in methylacetylene in intense laser fields: double proton migration and proton/deuteron exchange.
Two-body Coulomb explosion in methylacetylene in intense laser fields: double proton migration and proton/deuteron exchange.
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DOI：
10.1039/c2cp23880b
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发表时间：
2012-02
期刊：
影响因子：
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通讯作者：
T. Okino;A. Watanabe;Huailiang Xu;K. Yamanouchi
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文献类型：
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作者：
T. Okino;A. Watanabe;Huailiang Xu;K. Yamanouchi
采用符合动量成像(CMI)研究了强激光场(790 nm, 40 fs, 5.0 × 10(13) W cm(-2))中甲基乙炔(CH(3)CCH)及其同位素甲基-d(3)-乙炔(CD(3)CCH)的二体分解过程。在甲基-d(3)-乙炔中，共鉴定出其中一个C-C键被破坏的总共六种分解途径，以及原子氢离子(H(+)或D(+))或分子氢离子(H(2)(+)、HD(+)、D(3)(+)或HD(2)(+))被排出的总共六种途径。对CMI数据的分析表明，两个氘核的迁移以及质子和氘核之间的交换发生在双电荷母体分子的二体分解之前。
Two-body decomposition processes of methylacetylene (CH(3)CCH) and its isotopomer methyl-d(3)-acetylene (CD(3)CCH) in intense laser fields (790 nm, 40 fs, 5.0 × 10(13) W cm(-2)) are investigated by the coincidence momentum imaging (CMI). In methyl-d(3)-acetylene, a total of six decomposition pathways in which one of the C-C bonds is broken and a total of six pathways in which an atomic hydrogen ion (H(+) or D(+)) or a molecular hydrogen ion (H(2)(+), HD(+), D(3)(+), or HD(2)(+)) is ejected are identified. It is revealed from the analysis of the CMI data that the migration of two deuterons as well as the exchange between a proton and a deuteron occurs prior to the two-body decomposition of a doubly charged parent molecule.