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0001 \page ExampleSlowing Example slowing
0002
0003 \author S. Incerti (a, *) \n
0004 a. LP2i, IN2P3 / CNRS / Bordeaux University, 33175 Gradignan, France \n
0005 * e-mail: incerti@lp2ib.in2p3.fr \n
0006
0007 ## INTRODUCTION.
0008
0009 The slowing example shows how to simulate slowing down spectra for electrons
0010 in liquid water using the Geant4-DNA physics processes and models.
0011
0012 This example is provided by the Geant4-DNA collaboration.
0013
0014 It is described in Nucl. Instrum. and Meth. B 397 (2017) 45-50.
0015
0016 The Geant4-DNA processes and models are further described at:
0017 http://geant4-dna.org
0018
0019 Any report or published results obtained using the Geant4-DNA software shall
0020 cite the following Geant4-DNA collaboration publications:
0021 Med. Phys. 51 (2024) 5873–5889
0022 Med. Phys. 45 (2018) e722-e739
0023 Phys. Med. 31 (2015) 861-874
0024 Med. Phys. 37 (2010) 4692-4708
0025 Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
0026
0027 ## GEOMETRY SET-UP.
0028
0029 The geometry is a cube (World) made of liquid water (G4_WATER
0030 material). Electrons are shot from the center of the volume.
0031
0032 ## SET-UP
0033
0034 Make sure $G4LEDATA points to the low energy electromagnetic data files.
0035
0036 The code can be compiled with cmake.
0037
0038 It works in MT mode.
0039
0040 ## HOW TO RUN THE EXAMPLE
0041
0042 In batch mode, run:
0043 ```
0044 ./slowing slowing.in
0045 ```
0046
0047 The macro slowing.in shows how to use/define:
0048 - number of threads
0049 - Geant4-DNA physics constructors
0050 - tracking cut
0051 - atomic deexcitation
0052 - histograms
0053
0054 ## PHYSICS
0055
0056 All Geant4-DNA physics constructors can be used.
0057
0058 ## SIMULATION OUTPUT AND RESULT ANALYSIS
0059
0060 The output results consist in a slowing.root file containing 3 histograms
0061 of slowing down spectrum Phi/D (unit is /cm2/eV/Gy) as a function of energy
0062 (log (E/eV)) for:
0063 - all electrons (histogram number 1)
0064 - primary electrons (histogram number 2)
0065 - secondary electrons (histogram number 3)
0066
0067 This file can be easily analyzed using the provided ROOT macro
0068 file plot.C (root plot.C).
