Gabriele Cosmo
86 lines
2.8 KiB
Plaintext
86 lines
2.8 KiB
Plaintext
=========================================================
|
|
Geant4 - spower example
|
|
=========================================================
|
|
|
|
README file
|
|
----------------------
|
|
|
|
CORRESPONDING AUTHOR
|
|
|
|
S. Incerti et al. (a, *)
|
|
a. Centre d'Etudes Nucleaires de Bordeaux-Gradignan
|
|
(CENBG), IN2P3 / CNRS / Bordeaux University, 33175 Gradignan, France
|
|
* e-mail:incerti@cenbg.in2p3.fr
|
|
|
|
---->0. INTRODUCTION.
|
|
|
|
The spower example shows how to calculate stopping power of particles
|
|
in liquid water using the Geant4-DNA physics processes and models.
|
|
|
|
This example is provided by the Geant4-DNA collaboration.
|
|
|
|
These 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:
|
|
Phys. Med. 31 (2015) 861-874
|
|
Med. Phys. 37 (2010) 4692-4708
|
|
|
|
and for this example:
|
|
Nucl. Instrum. Meth. B 397 (2017) 45-50
|
|
|
|
---->1. GEOMETRY SET-UP.
|
|
|
|
The geometry is a 1 m radius sphere of liquid water (G4_WATER
|
|
material). Particles are shot randomly from the sphere centre.
|
|
|
|
Radius of the sphere, physics constructor, primary particle and
|
|
energy can be controlled by the spower.in macro file.
|
|
|
|
The PrimaryGeneratorAction class is adapted (G4 state dependent)
|
|
in order to enable generic physics list usage
|
|
(empty modular physics list).
|
|
|
|
---->2. 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.
|
|
|
|
---->3. HOW TO RUN THE EXAMPLE
|
|
|
|
In interactive mode, run:
|
|
|
|
./spower spower.in
|
|
|
|
The spower.in macro allows a full control of the simulation.
|
|
|
|
The computation of stopping power is performed in the
|
|
SteppingAction::UserSteppingAction method.
|
|
|
|
---->4. PHYSICS
|
|
|
|
Specific physics constructors, called G4EmDNAPhysics_stationary*
|
|
and adapted from G4EmDNAPhysics* are available to set all inelastic
|
|
models in a stationary mode for the computation of the stopping
|
|
power.
|
|
|
|
---->5. SIMULATION OUTPUT AND RESULT ANALYSIS
|
|
|
|
The accuracy of results may depend on incident statistics as well as
|
|
on number of steps specified in the SteppingAction::UserSteppingAction
|
|
method.
|
|
|
|
The output results consist in a text file (spower.txt), containing :
|
|
- energy of incident particles (in eV)
|
|
- stopping power (in keV/um)
|
|
- rms (i.e. standard deviation) on stopping power (in keV/um)
|
|
|
|
---------------------------------------------------------------------------
|
|
|
|
Should you have any enquiry, please do not hesitate to contact:
|
|
incerti@cenbg.in2p3.fr
|