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          Institute: MPI für Kernphysik     Collection: Precision Spectroscopy and Ultracold Ensembles     Display Documents



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ID: 441474.0, MPI für Kernphysik / Precision Spectroscopy and Ultracold Ensembles
On the Transition Rate of the Fe x Red Coronal Line
Authors:Brenner, G.; Crespo López-Urrutia, J. R.; Bernitt, S.; Fischer, D.; Ginzel, R.; Kubicek, K.; Mäckel, V.; Mokler, P. H.; Simon, M. C.; Ullrich, J.
Language:English
Date of Publication (YYYY-MM-DD):2009-08-25
Title of Journal:Astrophysical Journal
Journal Abbrev.:ApJ
Volume:703
Issue / Number:1
Start Page:68
End Page:73
Copyright:© Institute of Physics and IOP Publishing Limited 2009
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We present a lifetime measurement of the 3s 23p 5 2 Po 1/2 first excited fine-structure level of the ground state configuration in chlorine-like Fe X, which relaxes to the ground state through a magnetic dipole (M1) transition (the so-called red coronal line) with a wavelength accurately determined to 637.454(1) nm. Moreover, the Zeeman splitting of line was observed. The lifetime of 14.2(2) ms is the most precise one measured in the red wavelength region and agrees well with advanced theoretical predictions and an empirically scaled interpolation based on experimental values from the same isoelectronic sequence.
Free Keywords:atomic data; atomic processes; line: profiles; plasmas; stars: coronae; Sun: corona
External Publication Status:published
Document Type:Article
Communicated by:vogt
Affiliations:MPI für Kernphysik/Group of J. Ullrich/Electron Beam Ion Trap ( J.R. Crespo Lopez-Urrutia)
Identifiers:DOI:10.1088/0004-637X/703/1/68
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