Coincidence momentum imaging of ejection of hydrogen molecular ions from methanol in intense laser fields
Coincidence momentum imaging of ejection of hydrogen molecular ions from methanol in intense laser fields
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DOI：
10.1016/j.cplett.2005.11.059
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发表时间：
2006-02-15
影响因子：
2.8
通讯作者：
Nakano, H
中科院分区：
文献类型：
--
作者：
Okino, T;Furukawa, Y;Nakano, H
利用符合动量成像方法研究了强激光场（0.2拍瓦/平方厘米，60飞秒）中甲醇（CH₃OH）的双体库仑爆炸过程。在符合动量图像中，可靠地识别出了氢的逐出过程，CH₃OH₂⁺→Hₘ⁺ + CH₍₃₋ₘ₎OH⁺（m = 1 - 3）。根据碎片离子角分布的各向异性，相应的前体离子CH₃OH₂⁺逐出H⁺的寿命估计为70 - 290飞秒，逐出H₂⁺的寿命为110 - 550飞秒，逐出H₃⁺的寿命远长于1.4皮秒。（c）2005爱思唯尔有限公司。保留所有权利。
Two-body Coulomb explosion processes of methanol (CH3OH) in an intense laser field (0.2 pW/cm(2), 60 fs) are investigated by the coincidence momentum imaging method. In the coincidence momentum images, the hydrogen ejection processes, CH3OH2+ ->, H-m(+) + CH(3-m)OH+ (m = 1-3), are securely identified. From the anisotropy in the angular distributions of the fragment ions, the lifetimes of the corresponding precursor ions CH3OH2+ are estimated to be 70-290 fs for the H+ ejection, 110-550 fs for the H-2(+) ejection, and much longer than 1.4 ps for the H-3(+) ejection. (c) 2005 Elsevier B.V. All rights reserved.