G. S. Adams

0.8 GeV p + Pb 208 elastic scattering and the quantity Δ r np

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.

Elastic scattering of 0.8 GeV polarized protons from 46,48Ti☆

Abstract Differential cross sections and analyzing powers for elastic scattering of 800 MeV polarized protons from 46,48Ti have been measured at laboratory angles ranging between 4° and 21°. The data are analyzed within the spin-dependent KMT formalism. Neutron density distributions are extracted and compared with the results of other experiments and with theoretical predictions. Disagreements between empirical results and DME calculations are found.

Asymmetries for elastic pp scattering in the Coulomb interference region at 800 MeV

Asymmetries for elastic scattering of transversely polarised 800 MeV protons from Hydrogen in the coulomb interference region are presented and compared with the predictions of a recent phase shift analysis.

Analyzing powers for the reaction /sup 2/H(p-arrow-right,. gamma. )/sup 3/He at 800 MeV

Analyzing powers have been measured for the reaction /sup 2/H(p-arrow-right,..gamma..)/sup 3/He at a proton beam energy of 800 MeV. The results are in good agreement with microscopic calculations. At this energy the data are most sensitive to the meson-exchange amplitudes. Proton initial-state interactions also play an important role

Analyzing powers for the reaction2H(p→,γ)3He at 800 MeV

Analyzing powers have been measured for the reaction /sup 2/H(p-arrow-right,..gamma..)/sup 3/He at a proton beam energy of 800 MeV. The results are in good agreement with microscopic calculations. At this energy the data are most sensitive to the meson-exchange amplitudes. Proton initial-state interactions also play an important role

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

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.

0.8-GEV P Pb-208 ELASTIC SCATTERING AND THE QUANTITY DELTA - R (N P)

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.