First detection of the deuterium Balmer series

Details First detection of the deuterium Balmer series First detection of the deuterium Balmer series

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002p%26ss...50.1235h&link_type=abstract

Planetary and Space Science, Volume 50, Issue 12-13, p. 1235-1238.

Physics

Scientific paper

The first detection and identification of deuterium Balmer lines are reported in five H II regions of the Galaxy and the Small Magellanic Cloud. The D I lines appear as faint, narrow emission features in the blue wings of the H I Balmer lines and can be distinguished from high-velocity H I emission. The identification with deuterium and the excitation mechanism by fluorescence are both established beyond doubt. Measurements of deuterium Balmer series might lead to a new, optical method of deuterium abundance measurement in the interstellar medium and beyond.

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