This FORTRAN 77 code encompasses the relativistic momentum space One-Boson-Exchange potential (OBEP) and Nucleon-Nucleon scattering. It was written by R. Machleidt and appeared in [R. Machleidt, Computational Nuclear Physics 2 Nuclear Reactions, (Springer-Verlag, 1993), K. Langanke, J.A. Maruhn, S.E. Koonin eds., Chap. 1, pp. 1-29]. Additional resources can be found in

• R. Machleidt, K. Holinde, and C. Elster, Phys. Rept. 149, 1 (1987)
• R. Machleidt, Adv. Nucl. Phys. 19, 189 (1989)

To compile the code use f77 or g77

f77 bonn.f phases.f cph.f

Inputs for the phase shift calculation are contained in dphbonnbpv.d and the outputs in phbonnbpv.d

The subroutine bonn.f computes the momentum-space OBEP in terms of partial-wave helicity matrix elements. Although the code uses several subroutines, the user needs to call only bonn without worrying about the other computer programs contained in the package.

Phase shifts are calculated from the R-matrix. The R-matrix is calculated using matrix inversion [Michael I. Haftel and Frank Tabakin, Nucl. Phys. A 158, 1 (1970)] and the Bonn Potential.