中国物理B ›› 1996, Vol. 5 ›› Issue (11): 809-816.doi: 10.1088/1004-423X/5/11/002

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

STRUCTURES IN THE SPECTRUM OF MULTIPHOTON DETACHMENT RATES OF NEGATIVE IONS

朱颀人, 王兵兵, 潘守甫   

  1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
  • 收稿日期:1995-10-11 出版日期:1996-11-20 发布日期:1996-11-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China.

STRUCTURES IN THE SPECTRUM OF MULTIPHOTON DETACHMENT RATES OF NEGATIVE IONS

ZHU QI-REN (朱颀人), WANG BING-BING (王兵兵), PAN SHOU-FU (潘守甫)   

  1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China
  • Received:1995-10-11 Online:1996-11-20 Published:1996-11-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China.

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摘要： With the help of a model calculation, the following features in the multiphoton detachment rate spectrum of negative ions are shown: (1) the global behavior of the rate, as a function of the photon frequency, does follow the so-called ‘step-like' pattern; (2) a Wigner-type cusp occurs at every threshold open for the lower photon number channel; (3) a clear dip appears at a certain frequency point slightly lower than each threshold frequency. All these features are interpreted as the general characteristics of multiphoton detachments on the R-matrix-Floquet analysis. Comparisons are made with the previous results. To the best of our knowledge, the third feature may be for the first time explained in this paper, though it is not first found by us.

Abstract: With the help of a model calculation, the following features in the multiphoton detachment rate spectrum of negative ions are shown: (1) the global behavior of the rate, as a function of the photon frequency, does follow the so-called ‘step-like' pattern; (2) a Wigner-type cusp occurs at every threshold open for the lower photon number channel; (3) a clear dip appears at a certain frequency point slightly lower than each threshold frequency. All these features are interpreted as the general characteristics of multiphoton detachments on the R-matrix-Floquet analysis. Comparisons are made with the previous results. To the best of our knowledge, the third feature may be for the first time explained in this paper, though it is not first found by us.

中图分类号:  (Other multiphoton processes)

  • 32.80.Wr
32.80.Gc (Photodetachment of atomic negative ions) 31.15.-p (Calculations and mathematical techniques in atomic and molecular physics)