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学科主题: 物理化学
题名: Experimental observations of s-p coupling in copper dimer anions
作者: Liu, Benkang1;  Wang, Yanqiu1;  Wang, Li1
通讯作者: 王利
刊名: PHYSICAL REVIEW A
发表日期: 2013-09-11
DOI: 10.1103/PhysRevA.88.033413
卷: 88, 期:3, 页:033413
收录类别: SCI
合作性质: 
文章类型: Article
部门归属: 11
项目归属: 1101
产权排名: 待补充
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Optics ;  Physics, Atomic, Molecular & Chemical
资助者: 1,1
研究领域[WOS]: Optics ;  Physics
英文摘要: The photoelectron velocity-map image technique was employed to examine the one-photon detachment of Cu monomer and dimer anions using a linearly polarized infrared femtosecond laser. While the photoelectron angular distribution (PAD) in a single-photon detachment experiment of Cu- shows no dependence on photon energy, the dimer anion PAD does show a strong dependence on photon energy. As the laser wavelength increases from 532 to 817 nm, the photoelectron angular distributions of the main one-photon detachment channel of the prominent detachment channel of Cu-2(-) changes its direction from parallel to the direction of polarization for the 532-nm laser to perpendicular to the direction of polarization for the 817-nm laser. Based upon a numerical analysis of the anisotropy parameters, the relative contributions of the s, p, and d orbitals are obtained. The fully occupied d orbitals contribute less to the detachment amplitude. The contribution of the p waves to the detachment amplitude increases with the photon energy, while that of s waves decreases, which is in agreement with the prediction of the Wigner threshold law. The relative contributions of the different partial waves, s and p, to the detachment amplitude are altered by the excess energy of the detached electron, resulting in the determined shape of the photoelectron angular distributions. Our one-photon photodetachment experiments on the energy-dependent angular distributions of the copper anionic dimers indicate that s-p coupling is important to the photodetachment of copper dimer anions, especially at increased photon energies.
关键词[WOS]: ELECTRONIC SHELL STRUCTURE ;  SMALL ALUMINUM CLUSTERS ;  SIMPLE METAL-CLUSTERS ;  ANGULAR-DISTRIBUTIONS ;  NEGATIVE-IONS ;  PHOTOELECTRON-SPECTROSCOPY ;  CROSS-SECTIONS ;  JELLIUM MODEL ;  PHOTODETACHMENT ;  SUPERATOMS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000324234400007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119105
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Liu, Benkang,Wang, Yanqiu,Wang, Li. Experimental observations of s-p coupling in copper dimer anions[J]. PHYSICAL REVIEW A,2013,88(3):033413.
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