Premium
Non‐Markoffian Theory of Activated Rate Processes II. Thermal Desorption
Author(s) -
Nitzan Abraham,
Carmeli Benny
Publication year - 1982
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.198200065
Subject(s) - chemistry , langevin equation , desorption , action (physics) , space (punctuation) , thermal desorption , inverse , thermal , master equation , rate equation , particle (ecology) , quantum , thermodynamics , classical mechanics , statistical physics , quantum mechanics , physics , kinetics , linguistics , philosophy , geometry , mathematics , oceanography , adsorption , geology
A model for thermal desorption, described by a one dimensional classical generalized Langevin equation (GLE) for the motion of an adatom, is solved by reducing the GLE to a Fokker Planck equation in action space. The escape rate is obtained as the inverse mean first passage time for the particle to achieve a threshold energy (or action). A calculation using parameters corresponding to the desorption of Ar from W is compared with quantum mechanical results for the same model.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom