skip to main content

Title: Code System for Monte Carlo Simulation of Electron and Photon Transport.

Version 01 PENELOPE performs Monte Carlo simulation of coupled electron-photon transport in arbitrary materials and complex quadric geometries. A mixed procedure is used for the simulation of electron and positron interactions (elastic scattering, inelastic scattering and bremsstrahlung emission), in which 'hard' events (i.e. those with deflection angle and/or energy loss larger than pre-selected cutoffs) are simulated in a detailed way, while 'soft' interactions are calculated from multiple scattering approaches. Photon interactions (Rayleigh scattering, Compton scattering, photoelectric effect and electron-positron pair production) and positron annihilation are simulated in a detailed way. PENELOPE reads the required physical information about each material (which includes tables of physical properties, interaction cross sections, relaxation data, etc.) from the input material data file. The material data file is created by means of the auxiliary program MATERIAL, which extracts atomic interaction data from the database of ASCII files. PENELOPE mailing list archives and additional information about the code can be found at See Abstract for additional features.
Publication Date:
OSTI Identifier:
Report Number(s):
PENELOPE2014; 004582MLTPL00
DOE Contract Number:
Resource Type:
Software Revision:
Software Package Number:
Software CPU:
Source Code Available:
Other Software Info:
Owner Installation: Facultat de Fisica (ECM), Universitat de Barcelona Contributors: Facultat de Fisica (ECM), Universitat de Barcelona and Universitat Polit´┐Żcnica de Catalunya de Barcelona, Spain, through the Nuclear Energy Agency Data Bank, Issy-les-Moulineaux, France. The Monte Carlo method is used. A sufficiently large number of particle histories is simulated, and relevant quantities are obtained as averages. The mixed simulation algorithm for electrons and positrons implemented in PENELOPE reproduces the actual transport process to a high degree of accuracy and is very stable even at low energies. This is partly due to the use of a sophisticated transport mechanics model based on the so-called random hinge method, with energy-loss corrections for soft events. Other differentiating features of the simulation are a consistent description of angular deflections in inelastic collisions and of energy-loss straggling in soft stopping events. Binding effects and Doppler broadening in Compton scattering are also taken into account. KEYWORDS: MONTE CARLO, BREMSSTRAHLUNG, GAMMA-RAY, HIGH ENERGY, POSITRON
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
Contributing Orgs:
Not Specified
Country of Publication:
United States

To initiate an order for this software, request consultation services, or receive further information, fill out the request form below. You may also reach us by email at: .

ESTSC staff will begin to process an order for scientific and technical software once the payment and signed site license agreement are received. If the forms are not in order, ESTSC will contact you. No further action will be taken until all required information and/or payment is received. Orders are processed within three to five business days.

Software Request