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The influence of nuclear spins on the transport properties of molecular gases and application to HD

Author

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  • Coope, J.A.R.
  • Sanctuary, B.C.
  • Beenakker, J.J.M.

Abstract

Coupling between the angular momentum J and the nuclear spins of a molecule modifies those contributions to the transport properties of a molecular gas which arise from the macroscopic orientational polarization. This (low pressure) effect is studied in detailfor molecular HD at low temperature (J = 1 states). Because the rotational quantum numbers are low (J = 1), a quantum treatment is essential and moreover be classical motion of J differs significantly from simple precession: the “nutation” of J being also important. This nutation gives rise to significant phase randomization of the angular-momentum polarizations at zero field, and to a field effect on the axial polarizations which are in addition to the usual field effects on nonaxial polarizations.

Suggested Citation

  • Coope, J.A.R. & Sanctuary, B.C. & Beenakker, J.J.M., 1975. "The influence of nuclear spins on the transport properties of molecular gases and application to HD," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 79(2), pages 129-170.
    • Handle: RePEc:eee:phsmap:v:79:y:1975:i:2:p:129-170
    DOI: 10.1016/0378-4371(75)90150-8
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    Citations

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    Cited by:

    1. Armentia, M.Díaz & Veguillas, J. & Palomares, F., 1984. "On generalized Waldmann-Snider equations," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 128(3), pages 447-466.
    2. Turfa, A.F. & Connor, J.N.L. & Thijsse, B.J. & Beenakker, J.J.M., 1985. "A classical dynamics study of Senftleben-Beenakker effects in nitrogen gas," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 129(3), pages 439-454.
    3. Turfa, A.F. & Knaap, H.F.P. & Thijsse, B.J. & Beenakker, J.J.M., 1982. "A classical dynamics study of rotational relaxation in nitrogen gas," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 112(1), pages 18-28.
    4. Baas, F. & Oudeman, P. & Knaap, H.F.P. & Beenakker, J.J.M., 1977. "Experimental investigation of the nonequilibrium velocity distribution function in a heat conducting gas," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 89(1), pages 73-89.
    5. Demeio, Lucio & Monchick, Louis, 1995. "Collision kernels for the Waldmann-Snider equation: generalization to gas mixtures," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 214(1), pages 95-114.
    6. Veguillas, J. & Muga, J.G., 1988. "On the Lippmann-Schwinger equation in Liouville space. Π̊ subdynamics," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 150(1), pages 172-198.
    7. Ivanov, C.I., 1978. "A quantum-statistical theory of chemical kinetics," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 94(3), pages 571-585.

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