Electron-Impact Excitation of Fe-peak Ions for Astrophysical Applications

C. M. Cassidy*, C. A. Ramsbottom, M. P. Scott, P. G. Burke, Catherine Ramsbottom

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper discusses one of the major outstanding problems in atomic collision physics, namely the accurate theoretical treatment of electron scattering from open d-shell systems, and explores how this issue has been addressed over recent years with the development of the new parallel R-matrix suite of codes. It focuses on one code in particular - the new parallel R-matrix package PRMAT, which has recently been extended to account for relativistic fine-structure effects. This program facilitates the determination of accurate electron-impact excitation rates for complex open 3d-shell systems including the astrophysically important Fe-peak ions such as Ni II, Fe II and Fe III. Results are presented for collision strengths and Maxwellian averaged effective collision strengths for the optically forbidden fine-structure transitions of Ni II. To our knowledge this is the most extensive calculation completed to date for this ion.

Original languageEnglish
Title of host publicationXXVI INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS
EditorsAE Orel, AF Starace, D Nikolic, N Berrah, TW Gorczyca, EY Kamber, JA Tanis
Place of PublicationBRISTOL
PublisherIOP PUBLISHING LTD
Number of pages6
ISBN (Print)*****************
DOIs
Publication statusPublished - 2009
Event26th International Conference on Photonic, Electronic and Atomic Collisions - Kalamazoo, Kalamazoo, United States
Duration: 22 Jul 200928 Jul 2009

Publication series

NameJournal of Physics Conference Series
PublisherIOP PUBLISHING LTD
Volume194
ISSN (Print)1742-6588

Conference

Conference26th International Conference on Photonic, Electronic and Atomic Collisions
CountryUnited States
CityKalamazoo
Period22/07/200928/07/2009

Keywords

  • PROGRAM

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