geant4

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 		  Geant4 - slowing example
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                                README file
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                           CORRESPONDING AUTHOR 

S. Incerti (a, *)
a. Centre d'Etudes Nucleaires de Bordeaux-Gradignan 
(CENBG), IN2P3 / CNRS / Bordeaux 1 University, 33175 Gradignan, France
* e-mail:incerti@cenbg.in2p3.fr

---->0. 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 S. Incerti et al. (2017), NIMB.

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:
Phys. Med. 31 (2015) 861-874
Med. Phys. 37 (2010) 4692-4708

---->1. 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.

---->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 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

---->4. PHYSICS

All Geant4-DNA physics constructors can be used.

---->5. SIMULATION OUTPUT AND RESULT ANALYSIS                                    

The output results consists 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).

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Should you have any enquiry, please do not hesitate to contact: 
incerti@cenbg.in2p3.fr