Investigación

Elastic electron scattering by water molecules

J.L.S. Lino

Nucleo de Pesquisas em Matemática Aplicada, Universidade Braz Cubas–UBC, Campus I, 08773–380, Mogi das Cruzes, São Paulo, Brazil.

Recibido el 21 de junio de 2005
Aceptado el 16 de agosto de 2006

Abstract

We report an application of the Schwinger variational principle with plane waves as a trial basis set. Differential cross sections are obtained for e^– – H₂O from 10 to 50 eV. In these studies the exchange potential is evaluated by the Born–Ochkur model and our results are found to be in reasonable agreement with experimental data and theoretical studies.

Keywords: Molecular excitation; elastic scattering of electrons; variational principle.

Resumen

Se analiza una aplicación del principio variacional de Schwinger desde la perspectiva de ondas planas para un conjunto base usando un modelo Born–Ochkur. El propósito de este trabajo es mostrar la sección eficaz para e^– – H₂O en el intervalo de 10 – 50 eV. Los resultados se comparamos con los experimentos.

Descriptores: Excitación molecular; dispersión elástica de electrones; principio variacional.

PACS: 34.80.Bm; 34.80.Gs

DESCARGAR ARTÍCULO EN FORMATO PDF

Acknowledgments

JLSL gratefully acknowledges the research support given by the Universidade Braz Cubas–2006, Mogi das Cruzes, SP, Brazil.

References

1. Electron–Molecule interactions and their Apllications (Ed. L.C. Christophorou, Academic Press 1984) Vol.1.        [ Links ]

2. E. Bruche, Ann, Phys., Lpz. 1 (1929) 93.        [ Links ]

3. V.F. Sokolov and Y. Sokolova, Sov. Tech. Phys. Lett. 7 (1981) 268.        [ Links ]

4. O. Sueoka, S. Mori, and L. Katoyama, J. Phys. B 19 (1986) L373.        [ Links ]

5. C. Szymtkowski, Chem. Phys. Lett. 136 (1987) 363.        [ Links ]

6. A. Zecca, G. Karwasz, S. Oss, R. Grisenti, and R. Brusa, J. Phys. B 20 (1987) L133.        [ Links ]

7. H. Nishimura and K. Yano, J. Phys. Soc. Japan 57 (1988) 1951.        [ Links ]

8. K. Jung, T. Antoni, R. Mueller, K.H. Kochen, and H. Erhart, J. Phys. B 15 (1982) 3535.        [ Links ]

9. See, Elctron Sattering: From Atoms, Molecules, Nuclei and Bulk Matter (Physics of Atoms and Molecules), Ed. by C.T. Whelan, and N. J. Mason (2005) and references therein.        [ Links ]

10. T. Shyn and S.Y Cho, Phys. Rev. A 36 (1987) 5138.        [ Links ]

11. W. M. Johnstone, W.R. Newel, J. Phys. B 24 (1991) 3633.        [ Links ]

12. A. Jain and G. Thompson, J. Phys. B 15 (1982) L631.        [ Links ]

13. L.M. Brescansin, M.A.P Lima, T.L. Gibson, W.M. Huo, and V. McKoy, J. Chem. Phys. 85 (1986) 1854.        [ Links ]

14. F.A. Gianturco, J. Phys. B 24 (1991) 3837.        [ Links ]

15. T.N. Rescigno and B.H. Lngsfield, Z. Phys. D 24 (1992) 117.        [ Links ]

16. L.E. Mahado, L.M. Brescansin, and L.M. Tao, Braz. J. Phys. 20 (2002) 5;         [ Links ] L. Machado, L.M. Tao, L.M. Brescansin, M.A.P. Lima, and V. McKoy, J. Phys. B 28 (1995) 467.        [ Links ]

17. J.L.S. Lino and M.A.P. Lima, Braz. J. Phys. 30 (2000) 432.        [ Links ]

18. J.L.S. Lino, Rev. Mex. Fis. 49 (2003) 6.        [ Links ]

19. J.L.S. Lino, Chin. J. Phys. 41 (2003) 497;         [ Links ] J.L.S. Lino, Chin. J. Phys. 44 (2006) (in press).        [ Links ]

20. M. Kolsrud, Phys. Rev. 112 (1958) 1436.        [ Links ]

21. K. Takatsuka and V. McKoy, Phys. Rev. A 30 (1984) 1734;         [ Links ] K. Takatsuka and V. McKoy, Phys. Rev. A 24 (1981) 2359;         [ Links ] K. Takatsuka and V. McKoy, Phys. Rev. A 23 (1981) 2359;         [ Links ] K. Takatsuka and V. McKoy, Phys. Rev. A 23 (1981) 2352.

22. L.M. Tao, K. Takatsuka, and V. McKoy, J. Phys. 14 (1981) 4115.        [ Links ]

23. J.L.S. Lino, Ph.D Thesis (1995), ITA–CTA, São Jose dos Campos, São Paulo, Brazil.        [ Links ]

24. J.L.S. Lino and M.A.P. Lima, Abstract of Contributed Papers, XX ICPEAC, TH089, Edited by F. Aumayr, G. Betz, and H.P. Winter (1997).        [ Links ]

26. M.A.P. Lima, L.M. Brescansin, A.J.R. da Silva, C. Winstead, Takatsuka and V. McKoy, Phys. Rev. 41 (1990) 327.        [ Links ]

25. See, F. Salvat, Phys. Rev. A 68 (2003) 02708;         [ Links ] V. Ochkur, Sov. Phys. JETP 18 (1964) 503.        [ Links ]

27. J.L.S. Lino, Chin. J. Phys. 44 (2006) 1.        [ Links ]

28. J.L.S. Lino, J. S. Germano, and M.A.P. Lima, J. Phys. B 27 (1994) 1881.        [ Links ]

29. See, R. Greer an D. Thompson, J. Phys. B 27 (1994) 3533.        [ Links ]

30. Y. Okamoto, K. Onda, and Y Itikawa, J. Phys. B 26 (1993) 745.        [ Links ]