Phys. Rev. Lett. 89, 013202 (2002) [4 pages]Influence of Resonances on Spectral Formation of X-Ray Lines in Fe XVIIReceived 24 January 2002; published 17 June 2002 New theoretical results from large-scale relativistic close coupling calculations reveal the precise effect of resonances in collisional excitation of x-ray lines of Ne-like Fe XVII. By employing the Breit-Pauli R-matrix method and an 89-level eigenfunction expansion, including up to n = 4 levels, significant resonance enhancement of the collision strengths of forbidden and intercombination transitions is shown. The present results should help resolve long-standing discrepancies; in particular, the present line ratios of three benchmark diagnostic lines 3C, 3D, and 3E at 15.014, 15.265, and 15.456 Å, respectively, are in excellent agreement with two independent measurements on electron-beam ion traps. Strong energy dependence in cross sections due to resonances is demonstrated. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.013202
DOI:
10.1103/PhysRevLett.89.013202
PACS:
34.80.Kw, 32.30.Rj, 95.30.Ky
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.