Nucleon-Nucleon Scattering Analyses. 2. Neutron-Proton Scattering from 0-MeV to 425-MeV and Proton Proton Scattering from 1-MeV to 500-MeV
Jul, 197663 pages
Published in:
- Phys.Rev.C 15 (1977) 1002-1020
Report number:
- VPISA-1-76
Citations per year
Abstract: (APS)
The first paper of this series reported on energy-dependent and energy-independent phase-shift analyses of proton-proton elastic scattering data between 1 and 500 MeV. The present paper extends the analysis to include neutron-proton elastic scattering data between 0 and 425 MeV. Although this analysis is similar to those of the Livermore series, it differs in a number of important respects. First, a charge-splitting prescription has been employed for the isovector phases which includes Coulomb barrier effects and takes into account the difference in the masses between charged and uncharged pions. Second, a K-matrix formalism has been used to impose the constraints of the deuteron pole and the peripheral interaction (one-pion-exchange contribution) on the energy-dependent representation. Third, the neutron-proton and proton-proton scattering data have been fitted simultaneously in the search. The energy-dependent solution obtained uses 46 phenomenological parameters to represent 2670 data, with χ2=2815. A number of the neutron-proton phases have changed from the values obtained in Livermore X at higher energies, but the low-energy behavior is largely unaltered. A notable exception is the mixing parameter ε1 which has been strongly affected by the deuteron pole. The proton-proton phases are changed very slightly from the paper I values as a result of the additional n−p constraints upon the I=1 phases. We feel that the net result of these alterations is a more compact and reliable representation of nucleon-nucleon scattering in the energy range considered.
NUCLEAR STRUCTURE Energy-dependent and energy-independent phase-shift combined analyses of 1-425 MeV n−p and 1-500 MeV p−p scattering data.- inspirereview:II-d-2
- NUCLEON NUCLEON: INTERACTION
- INTERACTION: NUCLEON NUCLEON
- P N: ELASTIC SCATTERING
- ELASTIC SCATTERING: P N
- P P: ELASTIC SCATTERING
- ELASTIC SCATTERING: P P
- EXCHANGE: ONE-PION
- MODEL: PERIPHERAL
- S-MATRIX
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