Observation of a Broad Resonance in the 23S Excitation of Helium by Electron Impact

G. B. Crooks, R. D. DuBois, D. E. Golden, and M. E. Rudd
Phys. Rev. Lett. 29, 327 – Published 7 August 1972
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Abstract

We have observed a broad P-wave resonance at about 50 eV primary energy in the angular distribution of electrons scattered after excitation of the 23S state of helium. The resonance has a width of about 15 eV and affects the differential excitation cross section by more than 3 orders of magnitude. It is suggested that this resonance is associated with the temporary formation of triply excited states of the negative helium ion.

  • Received 31 May 1972

DOI:https://doi.org/10.1103/PhysRevLett.29.327

©1972 American Physical Society

Authors & Affiliations

G. B. Crooks, R. D. DuBois, D. E. Golden, and M. E. Rudd

  • Behlen Laboratory of Physics, University of Nebraska, Lincoln, Nebraska 68508

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Issue

Vol. 29, Iss. 6 — 7 August 1972

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