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 ?
To reach these goals, THOR observes the Milky Way in atomic HI, molecular OH, and cm continuum and radio recombination lines tracing the ionized components of the ISM.
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. This survey was one of the first to utilize the on-the-fly interferometric technique that significantly improved the efficiency and uv coverage.