Radiative and Relativistic Effects in the Decay of Highly Excited States in Helium
2000 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 85, no 6, 1202-1205 p.Article in journal (Refereed) Published
A recent experimental study [J.-E. Rubensson et al., Phys. Rev. Lett. 83, 947 (1999)] measured a significant fluorescence yield of the He( 2lnl′) photoexcited resonances, showing major qualitative differences from nonrelativistic predictions. We present a further theoretical study of these states, and perform R-matrix multichannel quantum defect theory calculations to extract fluorescence and ionization cross sections. These theoretical results are in excellent agreement with newer, higher-resolution measurements. Radiative and spin-orbit effects are quantified and shown to play an important role in the overall characterization of highly excited states.
Place, publisher, year, edition, pages
2000. Vol. 85, no 6, 1202-1205 p.
IdentifiersURN: urn:nbn:se:uu:diva-94516DOI: 10.1103/PhysRevLett.85.1202OAI: oai:DiVA.org:uu-94516DiVA: diva2:168389