Abstract
The formula of Rayleigh [1] and Ritz [2] is used for determining upper bounds for E0's, E1's and E2's of nine members of the helium isoelectronic sequence. A rough estimation for the lower bounds of E0's is carried out using Temple's relation [3]. The calculations show that a 50-dimensional expansion space can be adjusted to obtain results in good agreement with those of other authors and to confine the exact E0's in gaps of the order of 10-5.
Original language | English |
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Pages (from-to) | 103-106 |
Number of pages | 4 |
Journal | Physica B+C |
Volume | 97 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jul 1979 |
Externally published | Yes |
ASJC Scopus subject areas
- General Engineering