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On Kinetic Equations for Particles with Internal Degress of Freedom

  • L. Waldmann
Part of the Acta Physica Austriaca book series (FEWBODY, volume 10/1973)

Abstract

Already in his famous 1872-paper Boltzmann even included polyatomic dilute gases. More recently this question has been reconsidered from the quantum theoretical point of view. The simplest model in this context is a gas of particles with spin, which has to be described by a one particle distribution matrix with 2 S + 1 rows and columns (S = value of spin). The H-theorem can be traced back to the unitarity of the scattering matrix for the binary collision, suitably occurringin the kinetic equation. A special spin-dependent scattering amplitude is considered for which the classical limit can easily be effectuated. In conclusion some remarks on the classical Boltzmann equation for rigid dumb-bells are made.

Keywords

Kinetic Equation Unitary Transformation Relative Momentum Optical Theorem Magnetic Quantum Number 
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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Copyright information

© Springer-Verlag 1973

Authors and Affiliations

  • L. Waldmann
    • 1
  1. 1.Institut für Theoretische PhysikUniversität Erlangen-NürnbergErlangenGermany

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