Separable Potential for the Neutron Proton System
198112 pages
Published in:
- Phys.Rev.C 26 (1982) 65-76
Citations per year
Abstract: (APS)
A separable potential is proposed for the n−p interaction in S01 and S13−D13 partial waves. In the singlet S state the potential fits new phenomenological phases rather accurately in the laboratory kinetic energy range 0-600 MeV; it is also capable of reproducing singlet effective-range parameters in close agreement with experiment. In the coupled state S13−D13 the potential provides a correct description of the deuteron data (ED, pD, Q, η), while at the same time it adequately fits modern phenomenological phases up to Elab≳500 MeV in both the S and the D wave; triplet effective-range parameters are also in agreement with experimental data. Only the mixing parameter ε1 deviates from predictions of phase-shift analyses. In the construction of the potential care was taken that its off-shell behavior be reasonable. As an eminent property it thus exhibits an off-shell behavior similar to the one of the Paris potential. In particular the S13−D13 potential yields a deuteron S-state wave function, which in momentum space shows a zero like the Paris potential. Still the model is simple enough to be of good use in modern computer codes for few-body systems and other nuclear applications.
NUCLEAR REACTIONS Separable potential proposed for n−p interaction; fits new on-shell data; off-shell behavior compared to Paris potential.- P N: INTERACTION
- INTERACTION: P N
- PARTIAL WAVE ANALYSIS
- MODEL: SEPARABLE POTENTIAL
- MANY-BODY PROBLEM
- MODEL: OFF-SHELL
- NUMERICAL CALCULATIONS: INTERPRETATION OF EXPERIMENTS
- 0.6 GEV
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