Calculation of the 1s-2s two-photon excitation cross-section in atomic hydrogen

Çelik G., Çelik E., KILIÇ H. Ş.

European Physical Journal D, vol.50, no.3, pp.237-240, 2008 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 50 Issue: 3
  • Publication Date: 2008
  • Doi Number: 10.1140/epjd/e2008-00233-9
  • Journal Name: European Physical Journal D
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.237-240
  • Dokuz Eylül University Affiliated: Yes

Abstract

The two-photon excitation cross-section of atomic hydrogen is calculated using explicit summation over intermediate states within the framework of dipole approximation. The matrix element for two-photon excitation is transformed into finite sums, consisting of the product of a radial and angular part. Nine intermediate states are employed in the calculation of the transition matrix element. The two-photon excitation cross-section obtained for the transition 1s 2S1/2-2s 2S1/2in atomic hydrogen is a good agreement with the literature. © 2008 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.