Investigación

 

Elastic scattering of positrons by H₂O at low energies

 

J.L.S. Lino

 

Assessoria e Orientação Estudantil - AOE, Cep:12243-010, n° 80 São José dos Campos, São Paulo, Brasil.

 

Received 19 June 2013.
Accepted 31 January 2014.

 

Abstract

We present a study theoretical on elastic positron-H₂ O collisions. More specifically, integral, and differential cross sections in the 1-10 eV energy range are reported. The calculations were performed using the Schwinger multichannel method with plane waves as a trial basis set (Jorge L S Lino, Phys. Scr. 80 (2009) 065303). The positron-H₂O interaction is described using the static plus polarization contributions. Comparison of our calculated results with the recent experimental of Zecca et al (J.Phys.B 39 (2006) 1597) and theoretical results of Arretche et al (Nucl. Instr. Meth. Phys. B 268 (2010) 178) is encouraging.

Keywords: Schwinger; positron; water.

 

Resumen

Se analiza uma aplicación del principio variacional de Schwinger desde la perspectiva de ondas planas para un conjunto base (Jorge L S Lino, Phys. Scr. 80 (2009) 065303). y sección integral and eficaz diferencial para positron- H₂O en el intervalo de 1-10 eV. Los resultados obtenidos se comparan con los experimentos and (Zecca et al (J. Phys.B 39 (2006) 1597) y teóricos (Arretche et al Nucl. Instr. Meth. Phys. B 268 (2010) 178).

Descriptores: Schwinger; positrón; agua.

 

PACS: 36.10.Dr; 34.50.Gb

 

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Acknowledgements

The author thank the Referee for fruitful discussion.

 

References

1. D. J. Day, G. Larrichia, and M. Charlton, Hyperfine Interact. 73 (1992) 2017.         [ Links ]

2. T. J. Murphy, and C. M. Surko, Phys. Rev. Lett 67 (1991) 2954.         [ Links ]

3. S. J. Gilbert, J. P. Sulivan, R. Greaves and C. M. Surko, Nucl. Instr. Methods B 171 (1992) 81.         [ Links ]

4. G.F. Gribakin, J.A. Young and C.M. Surko, Rev. Mod. Phys. 82 (2010) 2557        [ Links ]

5. T. L. Gibson, J. Phys. B 25 (1992) 1321.         [ Links ]

6. T. J. Murphy, and C. M. Surko, Phys. Rev A 46 (1992) 5695.         [ Links ]

7. D. D. Reid, and J. M. Wadehra, J. Phy. B 29 (1996) L127.         [ Links ]

8. J. Beale, S. Armitage, and G. Laricchia, J. Phys. B 39 (2006) 1337.         [ Links ]

9. F. Arretche, and M. A. P. Lima, Phys. Rev. A 74 (2006) 042713.         [ Links ]

10. E. P. da Silva, M. T. D. Varella, and M. A. P. Lima, Phys. Rev. A 72 (2005)062715.         [ Links ]

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

12. J. L. S. Lino, Chin. J. Phys. 44 (2006) 497.         [ Links ]

13. C. Champion and C. Le Loirec, Phys. Nucleonics 11 (1953) 40.         [ Links ]

14. A. Jain, Phys. Rev. A 41 (1990) 2437.         [ Links ]

15. K. L. Baluja and A. Jain, Phys. Rev. 45 (1992) 7838.         [ Links ]

16. F. Arretche et al., Nucl. Instr. And Meth. B 268 (2010) 178.         [ Links ]

17. M. T. Lee, I. Iga, M. M. Fujimoto, and O. Lara, J. Phys. B 28 (1995) 3325.         [ Links ]

18. J. S. Germano and M. A. P. Lima, Phys. Rev. A 47 (1993) 3976.         [ Links ]

19. J. L. S. Lino, Phys. Scr. 76 (2007) 521.         [ Links ]

20. N. J. Mason and W. R. Newell, J. Phys. B20 (1987) 3913.         [ Links ]

21. M. A. P. Lima, et. al., Phys. Rev. A 41 (1990) 327.         [ Links ]

22. J. L. S. Lino, B. Christ, and Chin, J. Phys. 50 (2012) 398.         [ Links ]

23. F. Salvat, Phys. Rev. A 68 (2003) 012708.         [ Links ]

24. M. Kimura, O. Sueoka, A. Amada, and Y. Itikawa, Adv. Chem. Phys. 111 (2000) 537.         [ Links ]

25. A. Zecca , D. Sanyal, M. Chakrabarti, and M. J. Brunger, J. Phys.B. 39 (2006) 1597.         [ Links ]