Pickering series
Pickering series
[′pik·riŋ ‚sir·ēz] (spectroscopy)
A series of spectral lines of singly ionized helium, observed in very hot O-type stars, associated with transitions between the level with principal quantum number n = 4 and higher energy levels.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
The
Pickering Series 120 comprises a range of single-pole reed relays that require a board area of 4 mm x 4 mm, he said.
Years later lab experiments would show that the lines of the so-called
Pickering series are due to absorption from singly ionized helium.
The
Pickering Series 120 is a range of single-pole reed relays that require a board area of 4 mm x 4 mm.
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