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Series spectra of two-valence-electron atoms of boron (BII) and carbon (CIII)

Bowen, I. S. and Millikan, R. A. (1925) Series spectra of two-valence-electron atoms of boron (BII) and carbon (CIII). Physical Review, 26 (3). pp. 310-318. ISSN 0031-899X. http://resolver.caltech.edu/CaltechAUTHORS:BOWpr25d

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Abstract

Series spectra of BII and CIII.—By methods previously reported in the identification of lines in the extreme ultraviolet, 13 lines in addition to the pp′ group of BII have been identified, completing the classification of all lines known to be due to BII. Taking the 4f level as 27800 (probably correct to within 200 frequency units), the following term values were obtained for BII: 3s, 72930.8; 4s, 36655.5; 2p1, 165343.9; 2p2,3, 165362.7; 3p1, 59006.5; 3p2,3, 59010.0; 3d, 52054.2; 4d, 28640.4; 5f, 17795.7; 2S, 194325.9; 3S, 66665.1; 2P, 120929.4; 3D, 48410.3. In the case of CIII, 8 lines in addition to the pp′ group were identified, and taking the 4f level as 62600, the following term values were obtained for CIII: 3s, 146197.2; 2p, 331939.2; 3p1, 124685.8; 3p2, 124698.6; 3p3, 124704.1; 3d, 114387.2; 2S, 375463.1; 2P, 273111.0. Progression of frequency separations and of screening constants for regular doublets for Li to O is shown in Table VI, for one to six valence electrons. The separation (2p2-2p1) or (2p3-2p1) regularly decreases and the constant s regularly increases, for a given element, with the number of valence electrons, irrespective of the fact that both doublets and triplets are involved.


Item Type:Article
Additional Information:©1925 The American Physical Society. Received 6 June 1925.
Record Number:CaltechAUTHORS:BOWpr25d
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:BOWpr25d
Alternative URL:http://dx.doi.org/10.1103/PhysRev.26.310
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2434
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:04 Apr 2006
Last Modified:26 Dec 2012 08:49

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