0. 8 GeV p+/sup 208/Pb elastic scattering and the quantity. delta. r/sub n/p

Journal Article · Tue Apr 01 04:00:00 EST 1980 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.21.1488· OSTI ID:5479579

Hoffmann, G W; Ray, L; Barlett, M; McGill, J; Adams, G S; Igo, G J; Irom, F; Wang, A T.M.; Whitten, Jr, C A; Boudrie, R L; Amann, J F; Glashausser, C; Hintz, N M; Kyle, G S; Blanpied, G S

Analyses of 0.8 and 1 GeV p+/sup 208/Pb elastic angular distribution data have obtained neutron-proton root-mean-square radius differences (..delta..r/sub n/p) which are not consistent. Therefore, the 0.8 GeV experiment was repeated using a high resolution spectrometer. The new higher precision data are consistent with the older data, apart from a 15% overall normalization difference. A second order Kerman-McManus-Thaler optical model analysis of the new data, using a model-independent neutron density, yields ..delta..r/sub n/p=0.14 +- 0.04 fm, in good agreement with the most recent result obtained (0.16 +- 0.05 fm) from a similar analysis of the older 0.8 GeV data. In addition, the elastic angular distribution was extended to 42.5/sup 0/ center of mass in order to explore the momentum transfer region from 3.5 to 5.3 fm/sup -1/. Although the familiar diffraction pattern persists to 42.5/sup 0/, it was not possible within the framework of our application of the Kerman-McManus-Thaler optical model to fit the data even qualitatively at the larger momentum transfers.

• Research Organization: University of Texas, Austin, Texas 78712
• OSTI ID: 5479579
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 21:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651925* -- Nuclear Properties & Reactions
A=190-219
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
ANGULAR DISTRIBUTION
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DIFFRACTION MODELS
DISTRIBUTION
ELASTIC SCATTERING
ENERGY RANGE
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
LEAD 208 TARGET
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEON-NUCLEON INTERACTIONS
OPTICAL MODELS
PARTICLE INTERACTIONS
PARTICLE MODELS
PROTON REACTIONS
PROTON SPECTRA
SCATTERING
SCATTERING AMPLITUDES
SPECTRA
TARGETS