The case of large centre separation R in the two Coulomb centres problem is treated with the help of a comparison method. A multipole expansion for the energy in reciprocal powers of R is obtained up to O(R-5). Particular attention is paid to quasi-crossings of the energy curves. Their position and the splitting of the curves is found. It is shown that these quasi-crossings correspond to a Coulomb series for a charge equal to the difference between the charges of the centres.
|Number of pages||7|
|Journal||Journal of Physics B: Atomic and Molecular Physics|
|Publication status||Published - 1 Dec 1968|
Scopus subject areas
- Atomic and Molecular Physics, and Optics