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JINA R-matrix Project R.J. deBoer1, R.E. Azuma1,2, E.
Uberseder1, and M. Wiescher1
1University of Notre Dame
2University of Toronto
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What is R-matrix?
General mathematical formalism for characterizing low energy
reaction cross sections
Extrapolate cross sections to nearby energies but REQUIRES
experimental data for constraint
Most straightforward for Compound Nucleus type reactions
May be applied to other reaction types using approximations ◦
Radiative Capture ◦ Beta delayed particle emission
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AZURE: An R-matrix code for nuclear astrophysics
• JINA collaboration
• Lead developer: R.E. Azuma
• Programming Language: FORTRAN 77
• Involvement of numerous graduate students over about a 10 year
period
• General purpose multiple exit channel code
• Open Source
• Available for download: azure.nd.edu, Azuma et al., PRC 81,
045805 (2010)
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C++ version
Based on the algorithms developed for AZURE FORTRAN
Written in C++ using an object oriented approach
Utilizes currently maintained pubic libraries ◦ MINUIT2 ◦ GNU
Scientific Library
Graphical Interface created with Qt
Open Source
Easier to use!
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New capabilities
Dynamic memory ◦ Large numbers of levels and channels ◦ Large
amounts of data
Multiple processor computation ◦ MINUIT2 ◦ Faster computations
and minimization
Multiple entrance channels
◦ New possibilities for data analysis
Fully integrated graphical interface
◦ Binaries available for Windows and Mac ◦ Source code available
for Linux
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Multiple entrance/exit channel example
16O*
15N(p, g)16O 15N(p,a0)
12C 12C(a,a0)
12C 12C(a,a1)
12C 12C(a,p)15N 12C(a,g)16O 15N(p,p)15N
15N(p,a1)12C
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Demonstration of the C++ program
