Accurate long-range coefficients for two excited like isotope He atoms: He(2 {sup 1}P)-He(2 {sup 1}P), He(2 {sup 1}P)-He(2 {sup 3}P), and He(2 {sup 3}P)-He(2 {sup 3}P)
- Faculty of Technology, Charles Darwin University, Northern Territory 0909 (Australia)
- Department of Physics, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3 (Canada)
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138 (United States)
A general formalism is used to express the long-range potential energies in inverse powers of the separation distance between two like atomic or molecular systems with P symmetries. The long-range molecular interaction coefficients are calculated for the molecular symmetries {delta}, {pi}, and {sigma}, arising from the following interactions: He(2 {sup 1}P)-He(2 {sup 1}P), He(2 {sup 1}P)-He(2 {sup 3}P), and He(2 {sup 3}P)-He(2 {sup 3}P). The electric quadrupole-quadrupole term C{sub 5}, the van der Waals (dispersion) term C{sub 6}, and higher-order terms C{sub 8} and C{sub 10} are calculated ab initio using accurate variational wave functions in Hylleraas coordinates with finite nuclear mass effects. A comparison is made with previously published results where available.
- OSTI ID:
- 21011240
- Journal Information:
- Physical Review. A, Vol. 76, Issue 1; Other Information: DOI: 10.1103/PhysRevA.76.012723; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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