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The appearance of "forbidden lines" in spectra

Huff, L. D. and Houston, W. V. (1930) The appearance of "forbidden lines" in spectra. Physical Review, 36 (5). pp. 842-846. ISSN 0031-899X. doi:10.1103/PhysRev.36.842.

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A rough calculation shows that the quadrupole term in the radiation of a forbidden line is usually larger than the dipole produced by an external electric field. This is not true, however, when there is an intermediate state, with which both initial and final states combine, and which lies close to one of them. If the J selection rule is violated, and the Laporte rule is obeyed, the radiation cannot be due to the quadrupole term and must be ascribed to the octopole. Hg 2270 is such a line. An octopole transition will have a Zeeman effect distinctively different from that of a dipole or quadrupole.

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Additional Information:©1930 The American Physical Society. Received 23 July 1930.
Issue or Number:5
Record Number:CaltechAUTHORS:HUFpr30
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2586
Deposited By: Tony Diaz
Deposited On:11 Apr 2006
Last Modified:08 Nov 2021 19:49

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