Gabriele Cosmo
94 lines
2.8 KiB
Plaintext
94 lines
2.8 KiB
Plaintext
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Geant4 - wvalue example
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=========================================================
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README file
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----------------------
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CORRESPONDING AUTHOR
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S. Incerti (a, *)
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a. LP2i, IN2P3 / CNRS / Bordeaux University, 33175 Gradignan, France
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* e-mail: incerti@lp2ib.in2p3.fr
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---->0. INTRODUCTION.
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The wvalue example shows how to calculate w in liquid water
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for e- using the Geant4-DNA physics processes and models.
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w is computed as the ratio of the incident particle energy
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and the total number of ionisations.
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It is adapted from the svalue example.
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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 shall
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cite the following Geant4-DNA collaboration publications:
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Med. Phys. 51 (2024) 5873–5889
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Med. Phys. 45 (2018) e722-e739
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Phys. Med. 31 (2015) 861-874
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Med. Phys. 37 (2010) 4692-4708
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Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
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This example is presented in the following paper, which shall also be cited:
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Med. Phys. 42 (2015) 3870-3876
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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 randomly from the sphere centre.
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Radius of the sphere, physics constructor and energy can be
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controlled by the wvalue.in macro file.
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The PrimaryGeneratorAction class is adapted (G4 state dependent)
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in order to enable generic physics list usage
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(empty modular physics list).
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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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In interactive mode, run:
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./wvalue wvalue.in
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The wvalue.in macro allows a full control of the simulation.
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---->4. PHYSICS
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You can select Geant4-DNA physics constructor in wvalue.in.
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A tracking cut can be applied if requested.
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---->5. SIMULATION OUTPUT AND RESULT ANALYSIS
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The output results consist in a text file (wvalue.txt), containing:
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- the energy of incident particles (in eV)
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- the mean number of ionisations
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- its rms
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- the w value (in eV)
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- its rms (in eV)
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Note: rms values correspond to standard deviation.
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In addition, another macro (histo.in) is also provided including
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a series of histograms:
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- histogram #1 : nb of ionisation interactions per event
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- histogram #2 : total energy deposited in absorber
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- histogram #3 : true track length of the primary particle
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- histogram #4 : true step size of the primary particle
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- histogram #5 : projected range of the primary particle
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- histogram #6 : true track length of charged secondaries
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- histogram #7 : true track length of charged secondaries
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