Abstract

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.

Department(s)

Physics

Keywords and Phrases

Atomic Data; Atomic Processes; Line:profiles; Plasmas; Stars:coronae; Sun:corona

International Standard Serial Number (ISSN)

0004-637X

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2009 Institute of Physics - IOP Publishing, All rights reserved.

Included in

Physics Commons

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