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.
Received: 11 October 1995
Accepted manuscript online:
(Calculations and mathematical techniques in atomic and molecular physics)
Fund: Project supported by the National Natural Science Foundation of China.
Cite this article:
ZHU QI-REN (朱颀人), WANG BING-BING (王兵兵), PAN SHOU-FU (潘守甫) STRUCTURES IN THE SPECTRUM OF MULTIPHOTON DETACHMENT RATES OF NEGATIVE IONS 1996 Acta Physica Sinica (Overseas Edition) 5 809
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