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Stark broadening of high-principal-quantum-number n-alpha lines of hydrogen.High n-alpha lines (transitions n + 1 to n) with quantum numbers n between 50 and 250 have been observed emanating from galactic H II regions where the electron density and temperature are about 1000/cu cm and 1 eV, respectively. High n-alpha lines have not previously been seen in the laboratory where fairly homogeneous plasmas may be produced and relatively precise measurements of electron densities and temperatures can be made. The present work describes experiments where the first members of the hydrogen line series with lower states n = 10, 11, 12, and 13 have been detected in a laboratory plasma. The width of the 12-alpha line at 88.7 microns could be measured and was consistent with calculated broadening from elastic electron collisions and quasi-static ion effects.
Document ID
19730045750
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lasalle, T. R.
(Maryland, University College Park, Md.; U.S. Naval Material Command, Naval Weapons Laboratory, Dahlgren, Va., United States)
Nee, T.-J.
Griem, H. R.
(Maryland, University College Park, Md., United States)
Date Acquired
August 7, 2013
Publication Date
May 14, 1973
Publication Information
Publication: Physical Review Letters
Volume: 30
Subject Category
Physics, Atomic, Molecular, And Nuclear
Accession Number
73A30552
Distribution Limits
Public
Copyright
Other

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