Cold Molecules

Collisional cooling (a.k.a. buffer gas cooling to the atomic physics community) is a method for the study of collisions in the regime at low temperatures where kT ~ hvr .

[1][2][3][4][5][6]

References

  1. Messer, J. K. & De Lucia, F. C. Measurement of Pressure-Broadening Parameters for the CO-He System at 4 K. Phys. Rev. Lett. 53, 2555-2558 (1984).
  2. Goyette, T. M., Ebenstein, W. L. & De Lucia, F. C. Rotational and Vibrational Temperatures in a 77 K Collisionally Cooled Cell. J. Mol. Spectrosc. 140, 311-321 (1990).
  3. Pearson, J. C., Oesterling, L. C., Herbst, E. & De Lucia, F. C. Pressure Broadening of Gas Phase Molecular Ions at Very Low Temperature. Phys. Rev. Lett. 75, 2940-2943 (1995).
  4. Ball, C. D. & De Lucia, F. C. Direct Measurement of Rotationally Inelastic Cross Sections at Astrophysical and Quantum Collisional Temperatures. Phys. Rev. Lett. 81, 305-308 (1998).
  5. Ball, C. D. & De Lucia, F. C. Direct observation of L-doublet and hyperfine branching ratios for rotationally inelastic collisions of NO-He at 4.2 K. Chem. Phys. Lett. 300, 227-235 (1999).
  6. Ronningen, T. J. & De Lucia, F. C. Helium induced pressure broadening and shifting of HCN hyperfine transitions between 1.3 and 20 K. J. Chem. Phys. 122, 184319 (2005).