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The Structure of Triply Excited, Negative-Ion Resonances in the Autoionizing Region of Helium

Trantham, K W; Rau, A R P; Buckman, Stephen


The formation and decay of the two lowest-lying, triply excited He- resonances in the autoionizing region of the helium spectrum (57-60 eV) have been studied by measuring electron-impact excitation functions for the n = 2 singly excited states of helium as a function of electron scattering angle. These results offer unambiguous confirmation of the classification of these states as He- 2s 2p22P and 2s2p22D, respectively. Furthermore, the observation of the relative strengths of the decay of...[Show more]

CollectionsANU Research Publications
Date published: 1999
Type: Journal article
Source: Journal of Physics B: Atomic, Molecular and Optical Physics
DOI: 10.1088/0953-4075/32/3/021


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