dc.contributor |
Universitat Politècnica de Catalunya. Departament d'Organització d'Empreses |
dc.contributor.author |
Benedito Benet, Ernest |
dc.contributor.author |
Fernández-Varea, Jose Maria |
dc.contributor.author |
Salvat, Francesc |
dc.date |
2001-05 |
dc.identifier.citation |
Benedito, E.; Fernandez-Varea, J.; Salvat, F. Mixed simulation of multiple elastic scattering of electrons and positrons using partial-wave differential cross sections. "Nuclear instruments and methods in physics research. Section B, beam interaction", Maig 2001, vol. 174, núm. 1-2, p. 91-110. |
dc.identifier.citation |
0168-583X |
dc.identifier.uri |
http://hdl.handle.net/2117/7123 |
dc.language.iso |
eng |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.subject |
Àrees temàtiques de la UPC::Física |
dc.subject |
Elastic scattering |
dc.subject |
Dispersió (Física) |
dc.title |
Mixed simulation of multiple elastic scattering of electrons and positrons using partial-wave differential cross sections |
dc.type |
info:eu-repo/semantics/publishedVersion |
dc.type |
info:eu-repo/semantics/article |
dc.description.abstract |
We describe an algorithm for mixed (class II) simulation of electron multiple elastic scattering using numerical differential cross-sections (DCS), which is applicable in a wide energy range, from ~100 eV to ~1 GeV. DCSs are calculated by partial-wave analysis, or from a suitable high-energy approximation, and tabulated on a grid of scattering angles and electron energies. The size of the required DCS table is substantially reduced by means of a change of variable that absorbs most of the energy dependence of the DCS. That is, the scattering angle h is replaced by a variable
u, whose probability distribution function varies smoothly with the kinetic energy of the electron. A fast procedure to generate random values of u in restricted intervals is described. The algorithm for the simulation of electron transport in pure elastic scattering media (with energy-loss processes switched off) is obtained by combining this sampling procedure with a simple model for space displacements. The accuracy and stability of this algorithm is demonstrated by comparing results with those from detailed, event by event, simulations using the same DCSs. A complete transport code, including energy losses and the production of secondary radiations, is obtained by coupling the present elastic scattering simulation algorithm to the general-purpose Monte Carlo program PENELOPE. Simulated angular distributions of MeV electrons backscattered in aluminium and gold are in good agreement with experimental data. |