Review of recent work using the simulation code PENELOPE

Journal Article · Tue Aug 26 00:00:00 EDT 2003 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1619681· OSTI ID:20632554

Salvat, F; Campos, C; Segui, S; Acosta, E; Fernandez-Varea, J M ^[1]; Llovet, X ^[2]; Sempau, J ^[3]

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1. Facultat de Fisica (ECM). Universitat de Barcelona. Societat Catalana de Fisica (IEC). Diagonal 647. 08028 Barcelona (Spain)
2. Serveis Cientificotecnics. Universitat de Barcelona. Lluis Sole i Sabaris 1-3. 08028 Barcelona (Spain)
3. INTE. Universitat Politecnica de Catalunya. Diagonal 647. 08028 Barcelona (Spain)

The general-purpose Monte Carlo code PENELOPE for the simulation of coupled electron and photon transport is used to generate x-ray emission spectra from targets irradiated by electrons. This code provides a realistic description of the penetration and slowing down of electrons with energies in the range from {approx} 1 keV to 1 GeV. The simulation of bremsstrahlung emission is based on numerical partial-wave cross sections, differential in both the photon energy and the direction of emission. The ionization of K and L shells by electron impact is simulated by using total ionization cross sections calculated from the distorted-wave first Born approximation; these cross sections, which are different from those in the public version 2001 of PENELOPE, provide a better description of the ionization process. The relaxation of ionized atoms is accounted for by combining transition probabilities from the LLNL Evaluated Atomic Data Library with experimental x-ray energies. A systematic comparison of simulated x-ray spectra with absolute spectra measured with an electron microprobe, for various elemental solid targets and 20 keV electron beams will be presented. The discrepancies between Monte Carlo results and experiment will be discussed.

• OSTI ID: 20632554
• Journal Information: AIP Conference Proceedings, Vol. 680, Issue 1; Conference: 17. international conference on the application of accelerators in research and industry, Denton, TX (United States), 12-16 Nov 2002; Other Information: DOI: 10.1063/1.1619681; (c) 2003 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BORN APPROXIMATION
CROSS SECTIONS
DISTORTED WAVE THEORY
ELECTRON BEAMS
ELECTRON TRANSFER
EMISSION SPECTRA
IONIZATION
IONS
K SHELL
KEV RANGE 10-100
L SHELL
MONTE CARLO METHOD
NUCLEAR DATA COLLECTIONS
PARTIAL WAVES
PHOTON TRANSPORT
PROBABILITY
RELAXATION
SLOWING-DOWN
TRANSPORT THEORY
X-RAY EMISSION ANALYSIS
X-RAY SPECTRA