On the Transition Rate of the Fe X Red Coronal Line

Details On the Transition Rate of the Fe X Red Coronal Line On the Transition Rate of the Fe X Red Coronal Line

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...703...68b&link_type=abstract

The Astrophysical Journal, Volume 703, Issue 1, pp. 68-73 (2009).

Astronomy and Astrophysics

Astronomy

3

Atomic Data, Atomic Processes, Line: Profiles, Plasmas, Stars: Coronae, Sun: Corona

Scientific paper

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.

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