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Systematic Studies of N IV Transitions of Astrophysical Importance

Författare

  • J Fleming
  • Tomas Brage
  • KL Bell
  • N Vaeck
  • A HIibbert
  • MR Godefroid
  • CF Fischer

Summary, in English

E1, M2, M1 and E2 rates of transitions between n = 2 levels of N IV have been calculated using the tw independent codes CIV3 and MCHF. Convergence of each of the approaches has been studied and comparisons made as the complexity of the calculations increases to include valence, core-valence and core-core correlation. The agreement between the two methods is sufficiently good to allow us to set quite narrow uncertainty bars. For the S-1-P-1 degrees resonance line, our recommended f-value is 0.609 with an estimated uncertainty of 0.002, while our recommended A-value for the S-1(0)-P-3(1) degrees intercombination line is 580 s(-1) with an estimated uncertainty of 10 s(-1).

Publiceringsår

1995

Språk

Engelska

Sidor

758-768

Publikation/Tidskrift/Serie

Astrophysical Journal

Volym

455

Issue

2

Dokumenttyp

Artikel i tidskrift

Förlag

American Astronomical Society

Ämne

  • Physical Sciences

Nyckelord

  • ATOMIC DATA
  • ATOMIC PROCESSES

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0004-637X