## Physisorption KineticsThis monograph deals with the kinetics of adsorption and desorption of molecules physisorbed on solid surfaces. Although frequent and detailed reference is made to experiment, it is mainly concerned with the theory of the subject. In this, we have attempted to present a unified picture based on the master equation approach. Physisorption kinetics is by no means a closed and mature subject; rather, in writing this monograph we intended to survey a field very much in flux, to assess its achievements so far, and to give a reasonable basis from which further developments can take off. For this reason we have included many papers in the bibliography that are not referred to in the text but are of relevance to physisorption. To keep this monograph to a reasonable size, and also to allow for some unity in the presentation of the material, we had to omit a number of topics related to physisorption kinetics. We have not covered to any extent the equilibrium properties of physisorbed layers such as structures, phase tr- sitions and thermodynamic properties in general. A number of excellent revIew articles, listed in the bibliography, cover this material. Likewise, little is said about scattering off solid surfaces; this subject is again covered in several books and many review articles. Lastly, little is said about chemisorption kinetics, for which microscopic thebries and models have not been fully developed but are still at a rather early exploratory stage. |

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### Contents

1 | |

GasSolid Interaction | 23 |

The Master Equation | 89 |

l Transition Probabilities in the Master Equation | 112 |

Desorption Times | 142 |

Time of Flight Spectra | 198 |

Sticking and Accommodation e s e s e a | 223 |

Kramers Equation a e e | 259 |

Summary and Outlook | 282 |

References | 293 |

317 | |

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### Common terms and phrases

accommodation coefficient adatom adsorbed particles adsorption adsorption and desorption approach approximation beam Bendow and Ying bolometer bound state energies bound state transitions Brenig Brillouin zone calculated chemisorption collision continuum coverage crystal curves Debye model degrees of freedom density desorbing desorption process desorption rate detailed balance dynamics eigenvalue electron equilibrium experimental factor flash desorption frequency gas atom gas particle gas phase given Gortel and Kreuzer graphite Hartree-Fock helium inelastic initial integration isothermal desorption Kramers equation Kreuzer lattice layer Lennard-Jones master equation matrix mean field theory metal mobile adsorbate molecule momentum monolayer Morse potential motion one-dimensional Pagni peak perturbation theory phonon Phys physisorbed physisorption physisorption kinetics plane Rayleigh scattering Sect solid Sommer and Kreuzer sticking coefficient substrate Summerside surface atom surface Debye surface modes surface potential temperature Teshima thermal tion transition probabilities trapped two-dimensional velocity vibrational Vs(r wave functions wave vector