21 cm line of atomic hydrogen

Details 21 cm line of atomic hydrogen 21 cm line of atomic hydrogen

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994amjph..62.1077s&link_type=abstract

American Journal of Physics, Volume 62, Issue 12, pp. 1077-1081 (1994).

Physics

2

Hyperfine Interactions And Isotope Effects, Jahn-Teller Effect, Hi Regions And 21-Cm Lines, Diffuse, Translucent, And High-Velocity Clouds

Scientific paper

Discovered in 1951, the 21 cm hyperfine line of atomic hydrogen has become one of the best-studied spectral features in radioastronomy. Used to trace the distribution and velocity of atomic gas in our own and in other galaxies, the line has made an enormous contribution to our understanding of galactic structure. Now, 40 years after the line's discovery, a low-cost receiving system can be assembled from items of consumer electronics to enable study of the line in an undergraduate laboratory.

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