Energies of the Ground States of He,, and
- 15 May 1955
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 98 (4), 1050-1054
- https://doi.org/10.1103/physrev.98.1050
Abstract
A complete 14-parameter calculation for the ground state of He and similar 10-parameter calculations for the ground states of and have been carried out. In addition, using the four most important of eleven terms, which were tried individually as fifteenth parameters, an 18-parameter calculation for He has been carried out but without minimizing against the scale parameter . Similar 12-parameter calculations were carried out for and using the two most important terms beyond the tenth in the He calculation. As a result, the 18-parameter nonrelativistic ionization potential of He is found to be 198311.4 . The series of 6, 10, 14, 18 parameter values appears to converge to with an error of less than 2 . Adding the relativistic corrections yields which agrees to 0.1 with the latest experimental value. Considering the uncertainties of the theoretical and experimental values, the magnitude of the Lamb shift of the ground state of He (compared to ) must be less than 3 which does not contradict present theoretical estimates. Similar agreements but within wider limits of error are found for the 12-parameter energy values of the ground states of and .
Keywords
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