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GiBUU

GiBUU

The GiBUU project is aiming to provide a unified transport framework for

electron,
photon,
neutrino,
and hadron (especially pion) induced reactions on nuclei,
and for heavy-ion collisions.

For those reactions, the flow of particles is modelled within a Boltzmann-Uehling-Uhlenbeck (BUU) framework. The relevant degrees of freedom are mesons and baryons which propagate in mean fields and scatter according to cross sections which are tuned to the energy range of 10 MeV to more than 10 GeV.

The new numerical implementation, named GiBUU, is written in modular Fortran2003 and based upon a Subversion version control system, which allows for a concise control over the full development phase of the code.

The history of the code is rather long and reports about several main development steps. The present inititiative accomplished a total rewrite of the source code in a present-day computing language. The main goals of this effort were modularization to allow for a more transparent multi-user development process, a strict reduction of global variables for a more transparent debugging procedure, an improved control over the development phase such that modifications can be backtracked and a unified standard version. In the past, every member of the team had its own version of the code whereas in the present situation all members are programming in parallel on one single code. The technical overhead which comes with this is compensated by the benefit of a faster distribution of improvements and innovations and their enhanced sustainability.

GiBUU is being developed at the Institut für Theoretische Physik of the Justus-Liebig-Universität Giessen.

Physics Input

Learn more about our model

Publications and Seminars

Publications and theses of the GiBUU team
O.Buß: "Code development & pion DCX", Gießen, Seminar, July 2006. pdf

Visualisations

pion induced reactions (low energy) (movie #1, movie #2)

The GiBUU Code

GiBUU Documentation
- Documentation of Source Code
- Documentation of Makefile Targets

Used software and tools

Compiling
- Intel Fortran Compiler, g95 and Absoft Version 10.0: These compilers implement most features of the Fortran2003 standard.
- The Build process is steared via GNU make.
- Automated Makefile dependencies are generated using makedepf90

Documentation
ROBODoc is generating an automatic code documentation.

Version Control
Our code is based upon a Subversion version control system. The code can therefore be restored to any time point of its development phase.
GUI-Tool: eSvn