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题名:
Resonant photoelectron imaging of deprotonated uracil anion via vibrational levels of a dipole-bound excited state
作者: Huang, DL; Liu, HT; Ning, CG; Dau, PD; Wang, LS
刊名: CHEMICAL PHYSICS
出版日期: 2017
卷号: 482, 页码:374-383
关键词: Dipole-bound state ; Deprotonated uracil ; Photoelectron imaging ; Resonant photoelectron spectroscopy ; Autodetachment
DOI: 10.1016/j.chemphys.2016.06.003
文章类型: 期刊论文
英文摘要: We report both non-resonant and resonant high-resolution photoelectron imaging of cryogenically cooled deprotonated uracil anions, N1[U-H](-), via vibrational levels of a dipole-bound excited state. Photodetachment spectroscopy of N1[U-H](-) was reported previously (Liu et al., 2014), in which forty-six vibrational autodetachment resonances due to the excited dipole-bound state were observed. By tuning the detachment laser to the vibrational levels of the dipole-bound state, we obtained high resolution resonant photoelectron spectra, which are highly non-Franck-Condon. The resonant photoelectron spectra reveal many Franck-Condon inactive vibrational modes, significantly expanding the capability of photoelectron spectroscopy. A total of twenty one fundamental vibrational frequencies for the N1[U-H](.) radical are obtained, including all eight low-frequency out-of-plane modes, which are forbidden in non-resonant photoelectron spectroscopy. Furthermore, the breakdown of the Delta v = -1 propensity rule is observed for autodetachment from many vibrational levels of the dipole-bound state, due to anharmonic effects. In particular, we have observed intramolecular electron rescattering in a number of resonant photoelectron spectra, leading to excitations of low-frequency vibrational modes. Further theoretical study may be warranted, in light of the extensive experimental data and new observations, to provide further insight into the autodetachment dynamics and vibronic coupling in dipole-bound states, as well as electron molecule interactions. (C) 2016 Elsevier B.V. All rights reserved.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000394634700044
ISSN号: 0301-0104
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27435
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Huang, DL,Liu, HT,Ning, CG,et al. Resonant photoelectron imaging of deprotonated uracil anion via vibrational levels of a dipole-bound excited state[J]. CHEMICAL PHYSICS,2017-01-01,482:374-383.
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文件名: Resonant photoelectron imaging of deprotonated uracil anion via vibrational levels of a dipole-bound excited state.pdf
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