Time-dependent resonant scattering: An analytical approach

被引：2

作者：

Lecomte, J. M. ^{[1
]}

Kirrander, Adam ^{[2
]}

Jungen, Ch. ^{[1
]}

机构：

[1] Univ Paris 11, CNRS, Aime Cotton Lab, F-91405 Orsay, France

[2] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland

来源：

JOURNAL OF CHEMICAL PHYSICS | 2013年 / 139卷 / 16期

关键词：

COHERENCE ELECTRON BUNCHES; INDUCED DESORPTION; WAVE-PACKET; COLD ATOMS; DYNAMICS; SURFACES; PHASE;

D O I：

10.1063/1.4825335

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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. (C) 2013 AIP Publishing LLC.

引用

页数：9

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