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The normal state of the helium molecule-ions He-2(+) and He-2(++)

Pauling, Linus (1933) The normal state of the helium molecule-ions He-2(+) and He-2(++). Journal of Chemical Physics, 1 (1). pp. 56-59. ISSN 0021-9606. http://resolver.caltech.edu/CaltechAUTHORS:PAUjcp33a

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Abstract

With the use of wave functions constructed from hydrogen-like single-electron functions with an effective nuclear charge Z, the application of the variation method of treating the wave equation for the normal state of He, involving a three-electron bond, leads to the values Z = 1.833, r0 = 1.085A, De = 2.47 v.e., and 0 = approximately 1950 cm(-1). The experimentally determined values (from the He2 spectrum) are r0 = 1.090A, De = 2.5 v.e., and ½ = 1628 cm(-1). A similar discussion of He, with a covalent-plus-ionic wave function, shows that the energy curve has a minimum at r0 = 0.75A, 0 = approximately 3200 cm(-1), with a maximum 1.4 v.e. higher at about 1.1A. This configuration could act as the core for excited states of He and doubly-excited states of He2, some of which would be capable of existence with either one of two moments of inertia, one corresponding to r0 = 0.75A and the other to about the same values of r0 as for the analogous states in excited H or doubly-excited H2.


Item Type:Article
Additional Information:Copyright © 1933 American Institute of Physics. Received October 31, 1932. I am indebted to Mr. Sidney Weinbaum for carrying out many of the calculations involved in this work.
Record Number:CaltechAUTHORS:PAUjcp33a
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:PAUjcp33a
Alternative URL:http://dx.doi.org/10.1063/1.1749219
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2619
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:13 Apr 2006
Last Modified:26 Dec 2012 08:50

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