Wavelengths of forbidden transitions arising from levels within the Fe+19 2s(2)2p(3) ground configuration

Citation
Ta. Kucera et al., Wavelengths of forbidden transitions arising from levels within the Fe+19 2s(2)2p(3) ground configuration, ASTROPHYS J, 538(1), 2000, pp. 424-427
Citations number
23
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004637X → ACNP
Volume
538
Issue
1
Year of publication
2000
Part
1
Pages
424 - 427
Database
ISI
SICI code
0004-637X(20000720)538:1<424:WOFTAF>2.0.ZU;2-W
Abstract
In this paper we report the identification of all remaining unidentified fo rbidden lines arising from transitions within levels of the Fe+19 ground co nfiguration. These lines were identified using data from the SOHO/SUMER spe ctrograph and Skylab. Adjusted wavelength values are also given for some pr eviously observed lines. Forbidden lines that are the result of transitions within levels of the ground configuration of a highly ionized astrophysica lly abundant element generally have longer wavelengths than resonance lines emitted by the same ion. Many of these forbidden lines are fairly prominen t in low-density plasmas and traditionally have been used in determining pr operties of high-temperature astrophysical plasmas. The identified Fe+19 fo rbidden lines span the 300-2665 Angstrom wavelength range. Since spontaneou s decay rates of forbidden transitions arising from the same upper level ar e known quite accurately, these Lines can be used for calibrating spectrome ters over wide wavelength ranges.