Angle-Resolved Photoelectron Spectrometry Studies of the Autoionization of the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>2</mn><mrow><msup><mrow><mi mathvariant="italic">s</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow><mn>2</mn><mi mathvariant="italic">p</mi><mrow><msup><mrow><mi></mi></mrow><mrow><mn>2</mn></mrow></msup></mrow><mi mathvariant="italic">P</mi></math></span> Triply Excited State of Atomic Lithium: Experimental Results and <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">R</mi></math></span>-Matrix Calculations

S. Diehl; D. Cubaynes; H. L. Zhou; L. VoKy; F. J. Wuilleumier; E. T. Kennedy; J. M. Bizau; S. T. Manson; T. J. Morgan; C. Blancard; N. Berrah; J. Bozek

doi:10.1103/PhysRevLett.84.1677

Angle-Resolved Photoelectron Spectrometry Studies of the Autoionization of the $2 s^{2} 2 p^{2} P$ Triply Excited State of Atomic Lithium: Experimental Results and $R$ -Matrix Calculations

S. Diehl, D. Cubaynes, H. L. Zhou, L. VoKy, F. J. Wuilleumier, E. T. Kennedy, J. M. Bizau, S. T. Manson, T. J. Morgan, C. Blancard, N. Berrah, and J. Bozek

Phys. Rev. Lett. 84, 1677 – Published 21 February 2000

Abstract

We have measured the angle-resolved energy dependence of the electrons emitted over the energy range of the triply excited ${2 s}^{2} 2 p {}^{2}P$ lithium resonance using synchrotron radiation. We have also calculated the behavior of the angular distribution parameter $β$ using the $R$ -matrix approximation. Experimental and theoretical results are in good agreement and show deep minima in the $1 s 2 p {}^{1, 3}P$ ionic channels. The energy at which the minima occur does not coincide with the resonance energy, but is shifted towards higher energy.

Received 2 July 1999

DOI:https://doi.org/10.1103/PhysRevLett.84.1677

Authors & Affiliations

S. Diehl^1,*, D. Cubaynes¹, H. L. Zhou², L. VoKy³, F. J. Wuilleumier¹, E. T. Kennedy⁴, J. M. Bizau¹, S. T. Manson², T. J. Morgan⁵, C. Blancard⁶, N. Berrah⁷, and J. Bozek⁸

¹Laboratoire de Spectroscopie Atomique et Ionique, UMR 8624 du CNRS, Université Paris-Sud, B. 350, 91405 Orsay, France
²Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303
³Observatoire de la Côte d'Azur, BP 229, 06304 Nice, France
⁴School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
⁵Wesleyan University, Department of Physics, Middletown, Connecticut 06459
⁶DPTA, Centre CEA-DAM, BP 12, 91680-Bruyères-le-Châtel, France
⁷Department of Physics, Western Michigan University, Kalamazoo, Michigan 40849
⁸Advanced Light Source, Ernest Orlando Lawrence Berkeley Laboratory, University of California, 1 Cyclotron Road, Berkeley, California 97420