Gabriele Cosmo
80 lines
2.5 KiB
Plaintext
80 lines
2.5 KiB
Plaintext
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Geant4 - mfp example
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README file
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----------------------
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CORRESPONDING AUTHOR
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S. Incerti et al. (a, *)
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a. Centre d'Etudes Nucleaires de Bordeaux-Gradignan
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(CENBG), IN2P3 / CNRS / Bordeaux University, 33175 Gradignan, France
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* e-mail:incerti@cenbg.in2p3.fr
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---->0. INTRODUCTION.
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The mfp example shows how to calculate mean free path of particles
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in liquid water using the Geant4-DNA physics processes and models.
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It has been adapted from the spower and TestEm14 examples.
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This example is provided by the Geant4-DNA collaboration.
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These processes and models are further described at:
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http://geant4-dna.org
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Any report or published results obtained using the Geant4-DNA software
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shall cite the following Geant4-DNA collaboration publications:
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Phys. Med. 31 (2015) 861-874
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Med. Phys. 37 (2010) 4692-4708
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---->1. GEOMETRY SET-UP.
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The geometry is a 1 m radius sphere of liquid water (G4_WATER
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material). Particles are shot along x from the sphere centre.
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Radius of the sphere, physics constructor, primary particle and
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energy can be controlled by the mfp.in macro file.
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---->2. SET-UP
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Make sure G4LEDATA points to the low energy electromagnetic data files.
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The code can be compiled with cmake.
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It works in MT mode.
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---->3. HOW TO RUN THE EXAMPLE
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Use:
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./mfp mfp.in
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The mfp.in macro allows a full control of the simulation.
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The computation of MFP and other quantities is performed in the
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SteppingAction::UserSteppingAction method.
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The histo.in macro shows how to display several quantities
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(energy spectrum, scattering angle along x) of primary and secondaries.
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---->4. PHYSICS
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G4EmDNAPhysics* constructors are used.
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---->5. SIMULATION OUTPUT AND RESULT ANALYSIS
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The output results consist in a text file (mfp.txt), containing :
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- energy of incident particles (in eV)
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- mfp (in nm)
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- rms (i.e. standard deviation) on mfp (in nm)
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Otherwise you may use histo.in to generate ROOT histograms of the
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other quantities.
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---------------------------------------------------------------------------
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Should you have any enquiry, please do not hesitate to contact:
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incerti@cenbg.in2p3.fr
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