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1 =========================================================
2 Geant4 - slowing example
3 =========================================================
4
5 README file
6 ----------------------
7
8 CORRESPONDING AUTHOR
9
10 S. Incerti (a, *)
11 a. LP2i, IN2P3 / CNRS / Bordeaux University, 33175 Gradignan, France
12 * e-mail: incerti@lp2ib.in2p3.fr
13
14 ---->0. INTRODUCTION.
15
16 The slowing example shows how to simulate slowing down spectra for electrons
17 in liquid water using the Geant4-DNA physics processes and models.
18
19 This example is provided by the Geant4-DNA collaboration.
20
21 It is described in Nucl. Instrum. and Meth. B 397 (2017) 45-50.
22
23 The Geant4-DNA processes and models are further described at:
24 http://geant4-dna.org
25
26 Any report or published results obtained using the Geant4-DNA software shall
27 cite the following Geant4-DNA collaboration publications:
28 Med. Phys. 51 (2024) 5873–5889
29 Med. Phys. 45 (2018) e722-e739
30 Phys. Med. 31 (2015) 861-874
31 Med. Phys. 37 (2010) 4692-4708
32 Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
33
34 ---->1. GEOMETRY SET-UP.
35
36 The geometry is a cube (World) made of liquid water (G4_WATER
37 material). Electrons are shot from the center of the volume.
38
39 ---->2. SET-UP
40
41 Make sure $G4LEDATA points to the low energy electromagnetic data files.
42
43 The code can be compiled with cmake.
44
45 It works in MT mode.
46
47 ---->3. HOW TO RUN THE EXAMPLE
48
49 In batch mode, run:
50
51 ./slowing slowing.in
52
53 The macro slowing.in shows how to use/define:
54 - number of threads
55 - Geant4-DNA physics constructors
56 - tracking cut
57 - atomic deexcitation
58 - histograms
59
60 ---->4. PHYSICS
61
62 All Geant4-DNA physics constructors can be used.
63
64 ---->5. SIMULATION OUTPUT AND RESULT ANALYSIS
65
66 The output results consist in a slowing.root file containing 3 histograms
67 of slowing down spectrum Phi/D (unit is /cm2/eV/Gy) as a function of energy
68 (log (E/eV)) for:
69 - all electrons (histogram number 1)
70 - primary electrons (histogram number 2)
71 - secondary electrons (histogram number 3)
72
73 This file can be easily analyzed using the provided ROOT macro
74 file plot.C (root plot.C).
