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DOI | 10.1126/science.aax0076 |
Direct mapping of curve-crossing dynamics in IBr by attosecond transient absorption spectroscopy | |
Kobayashi, Yuki1; Chang, Kristina F.1; Zeng, Tao2; Neumark, Daniel M.1,3; Leone, Stephen R.1,3,4 | |
2019-07-05 | |
发表期刊 | SCIENCE
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ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2019 |
卷号 | 365期号:6448页码:79-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada |
英文摘要 | The electronic character of photoexcited molecules can abruptly change at avoided crossings and conical intersections. Here, we report direct mapping of the coupled interplay between electrons and nuclei in a prototype molecule, iodine monobromide (IBr), by using attosecond transient absorption spectroscopy. A few-femtosecond visible pulse resonantly excites the (B3P0(+)), Y(0(+)), and Z(0(+)) states of IBr, and the photodissociation dynamics are tracked with an attosecond extreme-ultraviolet pulse that simultaneously probes the I-4d and Br-3d core-level absorption edges. Direct comparison with quantum mechanical simulations unambiguously identifies the absorption features associated with adiabatic and diabatic channels at the B/Y avoided crossing and concurrent two-photon dissociation processes that involve the Y/Z avoided crossing. The results show clear evidence for rapid switching of valence-electronic character at the avoided crossing. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000474432700037 |
WOS关键词 | DISCRETE VARIABLE REPRESENTATION ; CONICAL INTERSECTION DYNAMICS ; ELECTRONIC STATES ; HIGH-CONTRAST ; PHOTODISSOCIATION ; PREDISSOCIATION ; POTENTIALS ; TRANSITION ; GENERATION ; SPECTRUM |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/201793 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA; 2.Carleton Univ, Dept Chem, Ottawa, ON K1S 5B6, Canada; 3.Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA; 4.Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Kobayashi, Yuki,Chang, Kristina F.,Zeng, Tao,et al. Direct mapping of curve-crossing dynamics in IBr by attosecond transient absorption spectroscopy[J]. SCIENCE,2019,365(6448):79-+. |
APA | Kobayashi, Yuki,Chang, Kristina F.,Zeng, Tao,Neumark, Daniel M.,&Leone, Stephen R..(2019).Direct mapping of curve-crossing dynamics in IBr by attosecond transient absorption spectroscopy.SCIENCE,365(6448),79-+. |
MLA | Kobayashi, Yuki,et al."Direct mapping of curve-crossing dynamics in IBr by attosecond transient absorption spectroscopy".SCIENCE 365.6448(2019):79-+. |
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