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Laser-cooling molecules

Concept, candidates, and supporting hyperfine-resolved measurements of rotational lines in the A-X(0,0) band of CaH
  • M. D. Di RosaEmail author
Article

Abstract.

Certain molecules, it seems, may be laser cooled by methods technically similar to those applied with abundant success in atomic physics. We discuss the spectroscopic criteria molecules should meet to make methods of Doppler cooling technically feasible and identify diatomic candidates. Some candidates, such as the alkaline-earth monohydrides (e.g. BeH and CaH), are paramagnetic and amenable to magneto-optical trapping. Our experimental study concentrates on CaH, and we present our recent high-resolution, molecular-beam-based measurements of low-J rotational lines within the A-X(0,0) band of CaH. From these measurements we report hyperfine separations in the A-state, as important to laser-cooling spectroscopy, and centroidal transition frequencies for comparison with existing values. We conclude with an outline of a possible magneto-optical trap for CaH.

Keywords

Spectroscopy Neural Network Experimental Study State Physics Complex System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    J.T. Bahns, W.C. Stwalley, P.L. Gould, J. Chem. Phys. 104, 9689 (1996)CrossRefGoogle Scholar
  2. 2.
    H.L. Bethlem, F.M.H. Crompvoets, R.T. Jongma, S.Y.T. van de Meerakker, G. Meijer, Phys. Rev. A. 65, 053416 (2002)CrossRefGoogle Scholar
  3. 3.
    H. Nishimura, G. Lambertson, J.G. Kalnis, H. Gould, Rev. Sci. Instrum. 74, 3271 (2003)CrossRefGoogle Scholar
  4. 4.
    M.G. Raizen, J. Koga, B. Sundaram, Y. Kishimoto, H. Takuma, T. Tajima, Phys. Rev. A. 58, 4757 (1998)CrossRefGoogle Scholar
  5. 5.
    H.J. Metcalf, P. van der Straten, J. Opt. Soc. Am. B 20, 887 (2003)Google Scholar
  6. 6.
    R. deCarvalho, J.M. Doyle, B. Freidrich, T. Guillet, J. Kim, D. Patterson, J.D. Weinstein, Eur. Phys. J. D 7, 289 (1999)CrossRefGoogle Scholar
  7. 7.
    F.M.H. Crompvoets, H.L. Bethlem, J. Küpper, A.J.A. van Roij, G. Meijer, Phys. Rev. A. 69, 063406 (2004)CrossRefGoogle Scholar
  8. 8.
    B.S. Zhao, M. Castillejo, D.S. Chung, B. Friedrich, Rev. Sci. Instr. 75, 146 (2004)CrossRefGoogle Scholar
  9. 9.
    C. Focsa, S. Firth, P.F. Bernath, R. Colin, J. Chem. Phys. 109, 5795 (1998)CrossRefGoogle Scholar
  10. 10.
    H.E. Popkie, J. Chem. Phys. 54, 4597 (1971)CrossRefGoogle Scholar
  11. 11.
    F.B.C. Machado, O. Roberto-Neto, F.R. Ornellas, Chem. Phys. Lett. 305, 156 (1999)CrossRefGoogle Scholar
  12. 12.
    K.P. Huber, G. Herzberg, Molecular Spectra and Molecular Structure IV. Constants of Diatomic Molecules (Van Nostrand Reinhold, New York, 1979)Google Scholar
  13. 13.
    K. Kirby, R.P. Saxon, B. Liu, Astrophys. J. 231, 637 (1979)CrossRefGoogle Scholar
  14. 14.
    L.-E. Berg, L. Klynning, Phys. Scripta 10, 331 (1974)Google Scholar
  15. 15.
    P.F. Weck, P.C. Stancil, K. Kirby, J. Chem. Phys. 118, 9997 (2003)CrossRefGoogle Scholar
  16. 16.
    T. Leininger, G.-H. Jeung, J. Chem. Phys. 103, 3942 (1995)CrossRefGoogle Scholar
  17. 17.
    B. Barbuy, R.P. Schiavon, J. Gregorio-Hetem, P.D. Singh, C. Batalha, Astron. Astrophys. Suppl. Ser. 101, 409 (1993)Google Scholar
  18. 18.
    M.V. Ramanaiah, S.V.J. Lakshman, Physica C 113, 263 (1982)Google Scholar
  19. 19.
    O. Appelblad, L. Klynning, J.W.C. Johns, Phys. Scripta 33, 415 (1986)Google Scholar
  20. 20.
    L.-E. Berg, K. Ekvall, A. Hishikawa, S. Kelly, C. McGuinness, Chem. Phys. Lett. 255, 419 (1996)CrossRefGoogle Scholar
  21. 21.
    P.W. Fairchild, G.P. Smith, D.R. Crosley, J.B. Jeffries, Chem. Phys. Lett. 107, 181 (1984)CrossRefGoogle Scholar
  22. 22.
    W.R. Anderson, D.R. Crosley, Chem. Phys. Lett. 62, 275 (1979)CrossRefGoogle Scholar
  23. 23.
    K.P. Kirby, E.M. Goldfield, J. Chem. Phys. 94, 1271 (1991)CrossRefGoogle Scholar
  24. 24.
    D.R. Yarkony, J. Chem. Phys. 91, 4745 (1989)CrossRefGoogle Scholar
  25. 25.
    J.W.C. Johns, F.A. Grimm, R.F. Porterm, J. Mol. Spectros. 22, 435 (1967)CrossRefGoogle Scholar
  26. 26.
    C.H. Douglass, H.H. Nelson, J.K. Rice, J. Chem. Phys. 90, 6940 (1989)CrossRefGoogle Scholar
  27. 27.
    J.K. Rice, L. Pasternack, H.H. Nelson, Chem. Phys. Lett. 189, 43 (1992)CrossRefGoogle Scholar
  28. 28.
    P. Baltayan, O. Nedelec, J. Chem. Phys. 70, 2399 (1979)CrossRefGoogle Scholar
  29. 29.
    S.R. Langhoff, C.W. Bauschlicher, Jr., J. Chem. Phys. 88, 5715 (1988)CrossRefGoogle Scholar
  30. 30.
    D.F. Rogowski, A. Fontijn, Chem. Phys. Lett. 137, 219 (1987)CrossRefGoogle Scholar
  31. 31.
    M. Larsson, Astron. Astrophys. 128, 291 (1983)Google Scholar
  32. 32.
    J.H. Van Vleck, Astrophys. J. 80, 161 (1934)CrossRefzbMATHGoogle Scholar
  33. 33.
    J.E. Littleton, S.P. Davis, Astrophys. J. 333, 1026 (1988)CrossRefGoogle Scholar
  34. 34.
    C.M. Olmsted, Astrophys. J. 27, 66 (1908)CrossRefGoogle Scholar
  35. 35.
    R.N. Zare, Angular Momentum (John Wiley and Sons, New York, 1988)Google Scholar
  36. 36.
    J. Flemming, A.M. Tuboy, D.M.B.P. Milori, L.G. Marcassa, S.C. Zilio, V.S. Bagnato, Opt. Comm. 135, 269 (1997)CrossRefGoogle Scholar
  37. 37.
    R. Gupta, C. Xie, S. Padua, H. Batelaan, H. Metcalf, Phys. Rev. Lett. 71, 3087 (1993); Phys. Rev. Lett. 72, 178(E) (1994)CrossRefGoogle Scholar
  38. 38.
    E. Hirota, High-Resolution Spectroscopy of Transient Molecules (Springer, New York, 1985)Google Scholar
  39. 39.
    C.H. Townes, A.L. Schawlow, Microwave Spectroscopy (Dover, New York, 1975)Google Scholar
  40. 40.
    W.L. Barclay, Jr., M.A. Anderson, L.M. Ziurys, Astrophys J. 408, L65 (1993)Google Scholar
  41. 41.
    C.I. Frum, J.J. Oh, E.A. Cohen, H.M. Pickett, Astrophys J. 408, L61 (1993)Google Scholar
  42. 42.
    J.L. Féménias, Phys. Rev. A 15, 1625 (1977)CrossRefGoogle Scholar
  43. 43.
    E. Hulthén, Phys. Rev. 29, 97 (1927)CrossRefGoogle Scholar
  44. 44.
    R. Pereira, S. Skowronek, A. González Ureña, A. Pardo, J.M.L. Poyatom, A.H. Pardo, J. Mol. Spec. 212, 17 (2002)CrossRefGoogle Scholar
  45. 45.
    T.C. Steimle, J. Gengler, J. Chen, Can. J. Chem. (to be published)Google Scholar
  46. 46.
    J. Weinstein, R. deCarvalho, T. Guillet, B. Freidrich, J.M. Doyle, Nature 395 148 (1998)Google Scholar
  47. 47.
    B. Freidrich, J. Weinstein, R. deCarvalho, J.M. Doyle, J. Chem. Phys. 110, 2376 (1999)CrossRefGoogle Scholar
  48. 48.
    E.L. Raab, M. Prentiss, A. Cable, S. Chu, D.E. Pritchard, Phys. Rev. Lett. 59, 2631 (1987)CrossRefGoogle Scholar
  49. 49.
    H.E. Radford, Phys. Rev. 122, 114 (1961)CrossRefGoogle Scholar
  50. 50.
    J. Xina, I. Ionescub, D. Kuffelb, S.A. Reid, Chem. Phys. 291, 61 (2003)CrossRefGoogle Scholar
  51. 51.
    E.L. Hill, Phys. Rev. 34, 1507 (1929)CrossRefzbMATHGoogle Scholar
  52. 52.
    M.D. Di Rosa, S.G. Crane, J.J. Kitten, W.A. Taylor, D.J. Vieira, X. Zhao, Appl. Phys. B 76, 45 (2003).CrossRefzbMATHGoogle Scholar
  53. 53.
    K.E. Gibble, S. Kasapi, S. Chu, Opt. Lett. 17, 526 (1992)Google Scholar
  54. 54.
    K. Lindquist, M. Stephens, C. Wieman, Phys. Rev. A 46, 4082 (1992)CrossRefGoogle Scholar
  55. 55.
    H.J. Davies, K. Szymaniec, C.S. Adams, Phys. Rev. A 62, 013412 (2000)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  1. 1.Los Alamos National LaboratoryLos AlamosUSA

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