On the Narrowing of Radio Recombination Lines at High Principal Quantum Numbers

Details On the Narrowing of Radio Recombination Lines at High Principal Quantum Numbers On the Narrowing of Radio Recombination Lines at High Principal Quantum Numbers

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...620l.133g&link_type=abstract

The Astrophysical Journal, Volume 620, Issue 2, pp. L133-L134.

Astronomy and Astrophysics

Astronomy

10

Atomic Processes, Ism: H Ii Regions, Line: Profiles, Radio Lines: Ism

Scientific paper

Limitations of a recent attempt by Oks to explain the decrease of line widths for principal quantum numbers beyond n~200, as observed by Bell et al. in H II regions, are discussed. Improved estimates of the ion Weisskopf radius and strong-collision impact parameter support previous calculations of the Stark widths, thus invalidating the proposed explanation of the observed decreases of line widths at large n.

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