Central-field calculations of photoionisation cross sections of excited states of Rb and Sr+and analysis of photoionisation cross sections of excited alkali atoms using quantum defect theory
- 28 March 1984
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 17 (6) , 993-1007
- https://doi.org/10.1088/0022-3700/17/6/013
Abstract
Photoionisation cross sections for excited nl states (n+ have been computed in the framework of a single-electron model by the use of a central potential. The evolution of non-hydrogenic behaviour of photoionisation near threshold is studied along a given series. Moreover, isoelectronic variations from Rb to Sr+ as well as systematic trends along the sequence of alkali atoms Li through Cs are discussed. The non-hydrogenic traits, mainly the occurrence of minima in photoionisation cross sections, are analysed in terms of quantum defect theory.Keywords
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