radio recombination line

radio recombination line

[′rād·ē·ō rē‚käm·bə′nā·shən ‚līn]
(spectroscopy)
A radio-frequency spectral line that results from an electron transition between energy levels in an atom or ion having a large principal quantum number n, greater than 50.
References in periodicals archive ?
The second survey is CORNISH-South which uses ATCA to perform a similar survey at 6 and 9 GHz in the southern galactic plane and also includes radio recombination lines.