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Author Breit, G. ♦ Hull, M. H. (Jr.) ♦ Lassila, K. E. ♦ Pyatt, K. D. (Jr.)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ BINDING ENERGY ♦ DIGITAL SYSTEMS ♦ ENERGY RANGE ♦ ERRORS ♦ GAMMEL-THALER POTENTIAL ♦ IBM 704 ♦ INTERACTIONS ♦ MEASURED VALUES ♦ NUCLEAR FORCES ♦ NUCLEAR MODELS ♦ OPE MODEL ♦ ORBITS ♦ PARTICLE MODELS ♦ PHASE SHIFT ♦ PROTONS ♦ SCATTERING ♦ SPIN
Abstract Results of gradient searches for phase parameters by means of an IBM-704 machine representing proton-proton scattering are reported on, and the procedure used is described. The analysis made use of most available measurements. The number of "measurement" used by the machine was 541. In some cases each "measurement" was a composite of two or more measurements found in the literature. The fits join smoothly to the /sup 1/S/sub O/ phase-shift energy curve below 9.7 Mev. A family of fits was obtained employing as a starting point the extended source + spin-orbit potential representation below 150 Mev extrapolated to one or another of the several Stapp. Ypsilantis, Metropolis fits at 312 Mev. Other searches started out with phase parameters corresponding to the Gammel-Thaler phenomenological potential. Evidence is presented to the effect that the better fits of bcth families are essentially the same. Error limits of phase parameters derived are estimated by various procedures. Some of the accumulated evidence for the applicability of the one-pion exchange potential (OPEP) to the calculation of phase parameters for the higher L and J is described and the basis ior previously published inferences regarding the spatial extension within which the major part of the potential is the OPEP is illustrated. In the case of the best fit, referred to as YLAM, tests indicating the existence of potentials for separate J were made showing therefore that there is no serious question regarding the energy rates of change of logarithmic derivatives of radial wave functions being negative. A brief discussion of the relationship of this requirement to the meson theory of nuclear forces is included. (auth)
ISSN 0031899X
Educational Use Research
Learning Resource Type Article
Publisher Date 1960-12-15
Publisher Department Yale Univ., New Haven
Journal Physical Review
Volume Number 120
Organization Yale Univ., New Haven


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