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Study of the continuum spectra from few nucleon targets using 100 and 150 MeV incident polarized protons

Thesis/Dissertation ·
OSTI ID:5921276
D, /sup 3/ /sup 4/He(p vector, p') differential cross sections and analyzing powers were measured at 100 and 150 MeV at the Indiana University Cyclotron Facility. Scattered particles were detected by two detector telescopes located at equal angles on opposite sides of the beam. Each detector telescope consisted of a 1000 ..mu.. Si surface barrier ..delta..E detector followed by a 3'' x 2'' diameter NaI(TI) crystal E detector. The beam polarization was normal to the scattering plane and was reversed every 120 seconds. The combination of polarization reversal and detectors on opposite sides of the beam permitted the use of a cross product formula, in which systematic errors divide out in first order, to calculate the analyzing powers. The continuum (p,p') energy spectra show pronounced quasifree peaks for D and /sup 3/He, while the /sup 4/He spectra are somewhat flat. The corresponding analyzing powers are positive at forward angles, essentially zero at 45/sup 0/, and negative at 60/sup 0/. DWIA calculations, assuming a quasifree nucleon knockout in which one nucleon is undetected, reproduce the position and shape of the quasifree peak rather well in D and /sup 3/He. Agreement with the /sup 4/He differential cross section is somewhat worse. For all targets the theoretical calculations are more forward peaked than the experimental data. Analyzing powers at forward angles are also described well by the calculations, but the calculations only reproduce the negative analyzing powers at 60/sup 0/ if (p vector, pd) contributions are included.
Research Organization:
Maryland Univ., College Park (USA)
OSTI ID:
5921276
Country of Publication:
United States
Language:
English

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Related Subjects

651225* -- Nuclear Properties & Reactions
A=1-5
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANALYZING POWER
BARYON REACTIONS
BEAMS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DEUTERIUM TARGET
DIFFERENTIAL CROSS SECTIONS
DIRECT REACTIONS
ENERGY RANGE
ENERGY SPECTRA
HADRON REACTIONS
HELIUM 3 TARGET
HELIUM 4 TARGET
INELASTIC SCATTERING
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEON REACTIONS
POLARIZED BEAMS
PROTON REACTIONS
QUASI-FREE REACTIONS
SCATTERING
SPECTRA
TARGETS