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State-selection and orientation of CH radicals by an electric hexapole

  • H. OhoyamaEmail author
  • Y. Nagamachi
  • T. Kasai
New Experimental Developments

Abstract.

A pure and high intense pulsed supersonic CH (X2Π ) radical beam source was developed via the C(1D) + H2 reaction. An electrostatic hexapole field was used to state-select CH radicals. The focusing curves for the single rotational states of CH were measured for the first time by a saturated laser-induced fluorescence (SLIF) spectroscopy for the R-branch in A2Δ3/2 ← X2Π 1/2 transition. The focusing curves were simulated by the classical trajectory simulation based on a Stark energy analysis of the rotational energy levels, including spin-orbit and Λ-doubling coupling effects. In addition, orientational distribution functions were calculated for the selectable states.

PACS.

39.10.+j Atomic and molecular beam sources and techniques 

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References

  1. W.A. Sanders, M.C. Lin, Chemical Kinetic of Small Organic Radicals, edited by Z.B. Alfassi (CRC, Boca Raton, FL, 1986), Vol. III Google Scholar
  2. M. Lindqvist, A. Sandqvist, A. Winnberg, L. Johansson, L.-A. Nyman, Astron. Astrophys. Suppl. Ser. 113, 257 (1995) ADSGoogle Scholar
  3. M.A. Weibel, T.D. Hain, T.J. Curtiss, J. Chem. Phys. 108, 3134 (1998) CrossRefADSGoogle Scholar
  4. T.D. Hain, M.A. Weibel, K.M. Backstran, T.J. Curtiss, J. Phys. Chem. A 101, 7674 (1997) CrossRefGoogle Scholar
  5. K. Schreel, J.J. ter Meulen, J. Phys. Chem. A 101, 7639 (1997) CrossRefGoogle Scholar
  6. K. Ikejiri, H. Ohoyama, Y. Nagamachi, T. Teramoto, T. Kasai, Chem. Phys. Lett. 379, 255 (2003) CrossRefGoogle Scholar
  7. M. Takezaki, H. Ohoyama, T. Kasai, K. Kuwata, Laser Chem. 15, 113 (1994) Google Scholar
  8. K. Ikejiri, H. Ohoyama, Y. Nagamachi, T. Kasai, Chem. Phys. Lett. 401, 465 (2005) CrossRefGoogle Scholar
  9. Y. Nagamachi, H. Ohoyama, K. Ikejiri, T. Kasai, J. Chem. Phys. 122, 064307 (2005) CrossRefGoogle Scholar
  10. C.R. Brazier, J.M. Brown, Can. J. Phys. 62, 1563 (1984) ADSGoogle Scholar
  11. M. Zachwieja, J. Mol. Spectrosc. 170, 285 (1995) CrossRefGoogle Scholar
  12. R.N. Zare, Angular Momentum (Wiley, New York, 1998) Google Scholar
  13. K. Schreel, J.J. ter Meulen, J. Phys. Chem. A 101, 7639 (1997) CrossRefGoogle Scholar
  14. T.D. Hain, M.A. Weibel, K.M. Backstrand, T.J. Curtiss, J. Phys. Chem. A 101, 7674 (1997) CrossRefGoogle Scholar
  15. E.L. Hill, J.H. van Vleck, Phys. Rev. 32, 250 (1923) CrossRefADSGoogle Scholar
  16. D.R. Lide, CRC Handbook of Chemistry and Physics, 74th edn. (CRC, Boca Raton, FL, 1993), Section 9 Google Scholar
  17. M. Zachwieja, J. Mol. Spectrosc. 70, 285 (1995) CrossRefGoogle Scholar
  18. M.G. Tenner, E.W. Kuipers, W.Y. Langhout, A.W. Kleyn, S. Stolte, Surf. Sci. 236, 151 (1990) CrossRefGoogle Scholar
  19. R.B. Bernstein, Chemical Dynamics via Molecular Beam and Laser Techniques (Oxford University Press, New York, 1982), Chap. 3 Google Scholar
  20. H. Ohoyama, T. Ogawa, T. Kasai, J. Phys. Chem. 99, 13606 (1995) CrossRefGoogle Scholar
  21. S. Stolte, Ber. Bunsenges. Phys. Chem. 86, 413 (1982) Google Scholar
  22. L.M. Ziutys, B.E. Turner, Astrophys. J. 292, L25 (1985) Google Scholar
  23. M. Goto, S. Saito, Astrophys. J. 452, L147 (1995) Google Scholar
  24. Y. Nagamachi, H. Ohoyama, T. Kasai (in preparation) Google Scholar

Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Authors and Affiliations

  1. 1.Department of ChemistryGraduate School of Science, Osaka UniversityOsakaJapan

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