Photoexcitation of a dipole-forbidden resonance in helium

B. Krässig, E. P. Kanter, S. H. Southworth, R. Guillemin, O. Hemmers, D. W. Lindle, R. Wehlitz, N. L. Martin

Research output: Contribution to journalArticlepeer-review

57 Scopus citations


The photoexcitation of a dipole-forbidden resonance in helium was presented. The photoexcitation was observed by measuring the nondipolar forward-backward asymmetry of photoelectron angular distributions in the 2l2l′ autoionizing region. Results showed that the quadrupole resonance in photoabsorption and extracted its Fano line shape parameters and relative phase of the 1sEp and 1sEd continua.

Original languageEnglish
Article number203002
Pages (from-to)2030021-2030024
Number of pages4
JournalPhysical Review Letters
Issue number20
StatePublished - May 20 2002

ASJC Scopus subject areas

  • General Physics and Astronomy


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