R. P. Liljestrand

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.

Elastic and inelastic scattering of 800 MeV protons by 58Ni

Abstract Differential cross sections for elastic and inelastic scattering of 800 MeV protons from 58 Ni have been measured to momentum transfers of 4 fm −1 . The elastic scattering data were fit using a phenomenological optical model potential. The inelastic scattering was analyzed in the distorted wave Born approximation (DWBA) to obtain deformation lengths.

Target thickness uniformity gauge

Abstract A method to accurately and quickly measure target thickness and uniformity for large area targets is described. The technique takes advantage of the fact that typical transmission curves for continuous beta-ray spectra are exponential up to very small transmission (⪡1%) under suitable conditions. Depending upon the particular beta source used, the technique can be optimized for any region of target thickness between 0–800 mg/cm 2 . A system to measure target thicknesses between 1–30 mg/cm 2 using a 147 Pm beta source was constructed and its performance is evaluated.

Corrective element for high resolution magnetic optics

Abstract A new type of multipole magnet which superimposes Gaussian-like profiles as basis functions to give any desired field integral, or combination of multipoles, is presented. Two large-aperture magnets based on this design were constructed and mapped. Each is capable of fitting to better than 1% the field integral ∫ Bydz = Σaixi, where i goes from 0 to 10, ai are adjustable parameters, and x is the transverse distance from the optic axis. Also, fine structure in line integrals with widths comparable to the multipole gap, which cannot be fit with a tenth order polynomial, can also be produced. Such magnets are ideal as adjustable primary or corrective elements in precision magnetic-optics systems.