Abstract
Diamagnetism in helium Rydberg atoms is studied near the ionisation threshold using constant scaled-energy laser spectroscopy. Quasi-Landau resonances in the Fouriertransform of the energy spectrum are explained using the classical periodic-orbit theory. Longlaser scans combined with a high-frequency resolution allow for a detailed comparison betweenexperiment and theory. Resonances with a scaled action Stup to 20 are identified andreproduced with an accuracy of 0.015. It is demonstrated that interference effects betweenresonances should be taken into account. © 1993 IOP Publishing Ltd.
Original language | English |
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Pages (from-to) | 903-908 |
Number of pages | 6 |
Journal | Europhysics Letters |
Volume | 21 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1993 |