D. K. McDaniels

Elastic differential cross sections and analyzing powers for p+40,42,44,48Ca at 0.8 GeV☆

Abstract Differential cross sections and analyzing powers for the elastic scattering of 800 MeV polarized protons from 40,42,44,48Ca are reported. A first-order, spin-dependent KMT optical potential analysis is presented from which the rms radii of the neutron densities are deduced. A comparison of these results with other determinations and with various theoretical predictions is given.

Elastic scattering of 0.8-GeV protons from C12, Ni58, and Pb208

Differential cross sections for elastic scattering of 0.8-GeV protons from /sup 12/C, /sup 58/Ni, and /sup 208/Pb have been measured. Preliminary analysis of the data in terms of the Kerman-McManus-Thaler formalism with spin-dependent nucleon-nucleon amplitudes shows sensitivity to details of proton and neutron matter distributions.

Elastic differential cross sections and analyzing powers for p + 54Fe, 58,64Ni at 800 MeV

Abstract Elastic scattering analyzing powers and differential cross sections for 800 MeV → p + 54Fe, 58,64Ni are reported. An approximately mode-independent technique is used to extract information concerning the neutron density distributions of these nuclei.

Analysis of elastic scattering of 0.8 GeV polarized protons from 116Sn and 124Sn

Abstract Differential cross section and analyzing power data for elastic scattering of 0.8 GeV polarized protons from 116Sn and 124Sn are analyzed in terms of a spin-dependent Kerman-McManus-Thaler formalism. Neutron matter densities and rms radii are deduced with careful attention to sources of error, and found to be in good agreement with Hartree-Fock predictions.

Coupled-channels effects in 0.8 GeV proton inelastic scattering from 58Ni

Abstract New differential cross sections for 0.8 GeV proton inelastic excitation of the first 2+ and 4+ states in 58Ni are compared with distorted wave Born approximation and coupled-channels predictions. Multistep processes and multi-phonon mixing are both shown to be important in describing the excitation of the 4+ state.

Analyzing power for the inelastic continuum with 200 MeV protons

Abstract Inelastic proton scattering from targets of 60 Ni, 90 Zr, and 208 Pb has been studied using 200-MeV polarized and unpolarized protons. The behavior with angle of a narrow region at the peak of the continuum underneath the giant resonance spectra follows that expected for free nucleon-nucleon scattering, modified by an energy shift dependent on target mass. Analyzing power results support the hypothesis that single-step quasifree scattering represents a significant fraction of the overall inelastic scattering for the excitation region near the proposed quasifree peak, but indicate that other processes start to dominate above this excitation region.

On the validity of microscopic calculations for inelastic proton scattering

Abstract Recent measurements of transition rates for low-lying collective states and giant resonances in 208 Pb using inelastic scattering of 200 and 334 MeV protons are in accord with accepted values. This is in sharp disagreement with earlier medium-energy proton inelastic scattering studies in which the validity of the collective model formalism was questioned. Combining these results with measurements at other energies, we conclude that the extraction of deformation lengths with the collective distorted wave Born approximation formalism is satisfactory to at least 800 MeV. The present results bring into question the microscopic calculations of inelastic scattering using RPA wave functions.

Elastic Scattering of 0.8-GeV Protons fromC12,Ni58, andPb208

Differential cross sections for elastic scattering of 0.8-GeV protons from /sup 12/C, /sup 58/Ni, and /sup 208/Pb have been measured. Preliminary analysis of the data in terms of the Kerman-McManus-Thaler formalism with spin-dependent nucleon-nucleon amplitudes shows sensitivity to details of proton and neutron matter distributions.

Elastic scattering of 0. 8-GeV protons from /sup 12/C, /sup 58/Ni, and /sup 208/Pb

Differential cross sections for elastic scattering of 0.8-GeV protons from /sup 12/C, /sup 58/Ni, and /sup 208/Pb have been measured. Preliminary analysis of the data in terms of the Kerman-McManus-Thaler formalism with spin-dependent nucleon-nucleon amplitudes shows sensitivity to details of proton and neutron matter distributions.