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Updated: May 6, 2026

Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
Time-dependent resonant scattering: an analytical approach
J M Lecomte1, Adam Kirrander, Ch Jungen
1Laboratoire Aimé Cotton du CNRS, Ba^timent 505, Université de Paris-Sud, F-91405 Orsay, France.
Abstract:
A time-dependent description is given of a scattering process involving a single resonance embedded in a set of flat continua. An analytical approach is presented which starts from an incident free particle wave packet and yields the Breit-Wigner cross-section formula at infinite times. We show that at intermediate times the so-called Wigner-Weisskopf approximation is equivalent to a scattering process involving a contact potential. Applications in cold-atom scattering and resonance enhanced desorption of molecules are discussed.
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