Potential energy curves for the interaction of a low-energy positron with matter: The case He+e+

Radiation Physics and Chemistry

Volumn 76, Issue 2, 2007, Pages 96-100

  Mohallem, José R ^a   Rolim, Flavia ^b  

^a Department of Chemistry   (Brazil)

^b UNIVERSITY OF COIMBRA   (Portugal)

Author keywords

Molecular model; Positron; Potential energy curves

Indexed keywords

ELASTICITY; ELECTRON SCATTERING; MATHEMATICAL MODELS; MOLECULAR DYNAMICS; POSITRONS;

ADIABATIC COUPLINGS; MOLECULAR MODELS; POTENTIAL ENERGY CURVES;

POTENTIAL ENERGY;

ARTICLE; DISSOCIATION; LIGHT SCATTERING; MOLECULAR DYNAMICS; POSITRON; POSITRONIUM; RADIATION ENERGY; RADIATION PHYSICS; RADIOCHEMISTRY;

EID: 33751186908     PISSN: 0969806X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.radphyschem.2006.03.011     Document Type: Article

References (25)

1. Feagin J.M., and Briggs J.S. Molecular description of two-electron atoms. Phys. Rev. Lett. 57 (1986) 984-987
2. Feagin J.M., and Briggs J.S. Molecular-orbital description of the states of two-electron systems. Phys. Rev. A 37 (1988) 4599-4613
3. Gonçalves C.P., and Mohallem J.R. A new algorithm to handle finite nuclear mass effects in electronic calculations: the ISOTOPE program. J. Comput. Chem. 25 (2004) 1736-1739
4. Gribakin G.F. Mechanisms of positron annihilation on molecules. Phys. Rev. A 61 (2000) (article number 022720)
5. Griffith T.C. Experimental aspects of positron collisions in gases. Adv. Atom. Mol. Phys. 15 (1979) 135-166
6. Jean Y.C., Mallon P.E., and Schrader D.M. Principles and Applications of Positron and Positronium Chemistry (2003), World Scientific, Singapore
7. Karl M.W., Nakanishi H., and Schrader D.M. Chemical stability of positronic complexes with atoms and atomic ions. Phys. Rev. A 30 (1984) 1624-1628
8. Landau L.D., and Lifshitz M. Quantum Mechanics (1965), Pergamon Press, Oxford (p. 167)
9. Marler J.P., Barnes L.D., Gilbert S.J., Sullivan J.P., Young J.A., and Surko C.M. Experimental studies of the interaction of low energy positrons with atoms and molecules. Nucl. Instr. and Meth. B 221 (2004) 84-92
10. Mohallem J.R. A further study on the discretization of the Griffin-Hill-Wheeler equation. Z. Phys. D 3 (1986) 339-344
11. Mohallem J.R. Evidences of molecular structure beyond the Born-Oppenheimer approximation: the model Hamiltonian. J. Mol. Struc. (Theochem.) 709 (2004) 11-13
12. Mohallem J.R., and Gonçalves C.P. A note on geometry relaxation of molecular positron complexes. J. Chem. Phys. 121 (2004) 5553-5554
13. Mohallem J.R., and Tostes J.G.R. The adiabatic approximation to exotic leptonic molecules: further analysis and a nonlinear equation for conditional amplitudes. J. Mol. Struc. (Theochem.) 580 (2002) 27-32
14. Mohallem J.R., Dreizler R.M., and Trsic M. A Griffin-Hill-Wheeler version of the Hartree-Fock equations. Int. J. Quantum. Chem. S 20 (1986) 45-55
15. Mohallem J.R., Rolim F., and Gonçalves C.P. A molecular model for positron complexes: long-range effects on 2γ pair-annihilation rates. J. Phys B: At. Mol. Opt. Phys. 37 (2004) 1045-1053
16. O 'Malley T.F. Diabatic states of molecules-quasistationary electronic states. Adv. Atom. Mol. Phys. 7 (1971) 223-249
17. 2 and bi-excitons. Chem. Phys. Lett. 332 (2000) 139-144
18. Rolim F., Moreira T., and Mohallem J.R. Heteroisotopic molecular behavior: the valence-bond theory of the positronium hydride. Braz. J. Phys. 34 (2004) 1197-1203
19. Rost J.M., and Wintgen D. Positronium negative ion: molecule or atom?. Phys. Rev. Lett. 69 (1992) 2499-2502
20. Ryzhikh M., and Mitroy J. A metastable state of positronic helium. J. Phys. B: At. Mol. Opt. Phys. 31 (1998) 3465-3470
21. Schimdt M.W., Baldridge K.K., Boatz J.A., Elbert S.T., Gordon M.S., Jensen J.H., Koseki S., Matsunaga N., Nguyen K.A., Su S.J., Windus T.L., Dupuis M., and Montgomery J.A. General atomic and molecular electronic structure system (Gamess). J. Comput. Chem. 14 (1993) 1347-1363
22. Schrader D.M. Semi-empirical polarization potential for low-energy positron-atom and positron atomic-ion interactions .1. Theory-hydrogen and the noble-gases. Phys. Rev. A 20 (1979) 918-932
23. Schrader D.M. Positronium hydride formation in collisions of positrons with molecular hydrogen. Theor. Chim. Acta 82 (1992) 425-434
24. Strasburger K. Positronic Formaldehyde-the configuration interaction study. Struct. Chem. 15 (2004) 415-420
25. Sueoka O., Kawada M.K., and Kimura M. Total and positronium formation cross-sections in polyatomic molecules. Nucl. Instr. and Meth. B 171 (2000) 96-102