Gabriele Cosmo\page ExampleSlowing Example slowing
\author S. Incerti (a, *) \n a. LP2i, IN2P3 / CNRS / Bordeaux University, 33175 Gradignan, France \n
- e-mail: incerti@lp2ib.in2p3.fr \n
INTRODUCTION.
The slowing example shows how to simulate slowing down spectra for electrons in liquid water using the Geant4-DNA physics processes and models.
This example is provided by the Geant4-DNA collaboration.
It is described in Nucl. Instrum. and Meth. B 397 (2017) 45-50.
The Geant4-DNA processes and models are further described at: http://geant4-dna.org
Any report or published results obtained using the Geant4-DNA software shall cite the following Geant4-DNA collaboration publications: Med. Phys. 51 (2024) 5873–5889 Med. Phys. 45 (2018) e722-e739 Phys. Med. 31 (2015) 861-874 Med. Phys. 37 (2010) 4692-4708 Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
GEOMETRY SET-UP.
The geometry is a cube (World) made of liquid water (G4_WATER material). Electrons are shot from the center of the volume.
SET-UP
Make sure $G4LEDATA points to the low energy electromagnetic data files.
The code can be compiled with cmake.
It works in MT mode.
HOW TO RUN THE EXAMPLE
In batch mode, run:
./slowing slowing.in
The macro slowing.in shows how to use/define:
- number of threads
- Geant4-DNA physics constructors
- tracking cut
- atomic deexcitation
- histograms
PHYSICS
All Geant4-DNA physics constructors can be used.
SIMULATION OUTPUT AND RESULT ANALYSIS
The output results consist in a slowing.root file containing 3 histograms of slowing down spectrum Phi/D (unit is /cm2/eV/Gy) as a function of energy (log (E/eV)) for:
- all electrons (histogram number 1)
- primary electrons (histogram number 2)
- secondary electrons (histogram number 3)
This file can be easily analyzed using the provided ROOT macro file plot.C (root plot.C).