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题名: Quantum over-barrier reflection effects manifested in photodetachment cross sections
作者: Yang, BC ;  Du, ML
刊名: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
出版日期: 2012
卷号: 45, 期号:17, 页码:175003
关键词: CLOSED CLASSICAL ORBITS ;  STATIC ELECTRIC-FIELD ;  METAL-SURFACE ;  HYDROGEN-ATOM ;  MAGNETIC-FIELD ;  RYDBERG STATES ;  WAVE PHOTODETACHMENT ;  SPECTRA ;  IONIZATION
学科分类: Physics
通讯作者: Yang, BC (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
部门归属: [Yang, B. C.; Du, M. L.] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
英文摘要: The photodetachment of H- near a potential barrier is studied. A new formula is presented for the cross sections induced by a barrier. The new formula describes two quantum effects near the barrier tops. For energies near and above the barrier tops, the quantum over-barrier reflection effects are included and the induced oscillations in the cross sections are still prominent; for energies near and below the barrier tops, the quantum tunnelling across barriers is taken into account and consequently the oscillations are weakened. For energies far away from the barrier tops, the new formula agrees with the standard closed-orbit theory. We demonstrate that a potential barrier of various width and location can be realized by placing a negative ion near a metal surface and applying an electric field pointing to the surface. The width and location of the barrier can be systematically changed by varying the electric field strength and the distance between the negative ion and the surface. Results are also presented for estimating the sizes and locations of the aforementioned quantum effects in the cross sections.
资助者: NSFC [11074260]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000308666000003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15028
Appears in Collections:理论物理所2012年知识产出_期刊论文

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Recommended Citation:
Yang, BC,Du, ML. Quantum over-barrier reflection effects manifested in photodetachment cross sections[J]. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS,2012,45(17):175003.
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