An Alternative Parameterization of R-matrix Theory

Details An Alternative Parameterization of R-matrix Theory An Alternative Parameterization of R-matrix Theory

2002-07-16

arxiv.org/abs/nucl-th/0207048v2

Phys.Rev. C66 (2002) 044611

Physics

Nuclear Physics

Nuclear Theory

8 pages; accepted for publication in Phys. Rev. C; expanded Sec. IV, added Sec. VI, added Appendix, corrected typos

Scientific paper

10.1103/PhysRevC.66.044611

An alternative parameterization of R-matrix theory is presented which is mathematically equivalent to the standard approach, but possesses features which simplify the fitting of experimental data. In particular there are no level shifts and no boundary-condition constants which allows the positions and partial widths of an arbitrary number levels to be easily fixed in an analysis. These alternative parameters can be converted to standard R-matrix parameters by a straightforward matrix diagonalization procedure. In addition it is possible to express the collision matrix directly in terms of the alternative parameters.

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