Spin-rotation parameter Q for elastic scattering of 800 MeV polarized protons from WO, UCa, and SYPb

Technical Report · Tue Oct 01 04:00:00 EDT 1985

DOI:https://doi.org/10.2172/6074216· OSTI ID:6074216

Fergerson, R W

The spin-rotation parameter Q was measured for WO, UCa, and SYPb using the 800 MeV proton beam produced at the Clinton P. Anderson Meson Physics Facility. The experiment was carried out using the High Resolution Spectrometer equipped with a focal-plane polarimeter to determine the scattered polarization components in all three directions. These data (when combined with previous cross section and analyzing power data) determine the amplitude describing the elastic scattering of protons from these spin-zero nuclei to within an overall phase. Q is shown to be more sensitive than either the cross section or analyzing power to differences between the nonrelativistic and relativistic scattering theories that describe the proton-nucleus reaction in terms of fundamental proton-nucleon input. The nonrelativistic predictions for Q generally lie below the data but consistently have the correct structure. The relativistic predictions for the UCa and SYPb Q data are quite good (better than the nonrelativistic predictions). The relativistic predictions for the WO Q data show much more structure than is evident in the data. 51 refs., 39 figs., 4 tabs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6074216
• Report Number(s): LA-10554-T; ON: DE86005864
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANALYZING POWER
BARYON REACTIONS
BEAMS
CALCIUM 40 TARGET
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
ELASTIC SCATTERING
ENERGY RANGE
EXPERIMENTAL DATA
HADRON REACTIONS
INFORMATION
LAMPF LINAC
LEAD 208 TARGET
LINEAR ACCELERATORS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESON FACTORIES
MEV RANGE
MEV RANGE 100-1000
MULTIWIRE PROPORTIONAL CHAMBERS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
OXYGEN 16 TARGET
POLARIZATION
POLARIZED BEAMS
PROPORTIONAL COUNTERS
PROTON REACTIONS
RADIATION DETECTORS
SCATTERING
SCINTILLATION COUNTERS
TARGETS
THEORETICAL DATA