PHASE-PARAMETER REPRESENTATION OF PROTON-PROTON SCATTERING FROM 9.7 TO 345 MEV

Journal Article · Thu Dec 15 00:00:00 EST 1960 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.120.2227· OSTI ID:4121652

Breit, G; Hull, Jr, M H; Lassila, K E; Pyatt, Jr, K D

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)

• Research Organization: Yale Univ., New Haven
• NSA Number: NSA-15-006656
• OSTI ID: 4121652
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Vol. Vol: 120; Other Information: Orig. Receipt Date: 31-DEC-61
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

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