Quasifree knockout of protons and deuterons from calcium, oxygen, and carbon targets induced by 150 MeV polarized protons
The /sup 40/Ca(p,2p) and /sup 16/O and /sup 12/C(p,pd) reactions induced by 150 MeV polarized protons were studied. The experiments employed quasifree (zero recoil) geometries. Energy sharing distributions and analyzing power distributions were extracted from the data and compared to Distorted Wave Impulse Approximation (DWIA) calculations. Energy sharing distribution calculations for the /sup 40/Ca(p,2p)/sup 39/K reaction are in fairly good agreement with the data, the agreement being better for L = 0 transitions than for L = 2 transitions. Extracted spectroscopic factors for low-lying states are in reasonable agreement with shell model calculations and previous experimental results. Analyzing power calculations for the low-lying states are in good agreement with the data, except in the L = 0 transition to the 2.53 MeV state of /sup 39/K where virtually the entire analyzing power results from spin-orbit effects. Analyzing power data suggest that 1d/sub (5/2)/ strength can be seen in the 11 MeV to 15 MeV region of excitation energy as well as in the 5 MeV to 10 MeV region. Analyzing powers for excitation energies larger than 15 MeV are close to zero, suggesting the dominance of multi-step events. The energy sharing distributions calculated for the /sup 16/O(p,pd) /sup 14/N(g.s.) and /sup 12/C(p,pd)/sup 10/B (g.s. + 0.717 MeV) transitions are generally in qualitative agreement with the data, however, the shape and magnitude of the calculated energy sharing distributions varied somewhat with the optical model and bound state parameters used. Analyzing powers in the (p,pd) reactions are in good agreement with analyzing powers for free p + d scattering, giving evidence to the credibility of the quasifree knockout mechanism.
- Research Organization:
- Maryland Univ., College Park (USA)
- OSTI ID:
- 5967291
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CALCIUM 40 TARGET
PROTON REACTIONS
CARBON 12 TARGET
OXYGEN 16 TARGET
KNOCK-OUT REACTIONS
BORON 10
DEUTERONS
MEV RANGE 100-1000
NITROGEN 14
POLARIZED BEAMS
POTASSIUM 39
PROTONS
QUASI-FREE REACTIONS
ALKALI METAL ISOTOPES
BARYON REACTIONS
BARYONS
BEAMS
BORON ISOTOPES
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DIRECT REACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRON REACTIONS
HADRONS
ISOTOPES
LIGHT NUCLEI
MEV RANGE
NITROGEN ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
POTASSIUM ISOTOPES
STABLE ISOTOPES
TARGETS
651325* - Nuclear Properties & Reactions
A=6-19
Experimental- Nuclear Reactions & Scattering- (-1987)
651525 - Nuclear Properties & Reactions
A=39-58
Experimental- Nuclear Reactions & Scattering- (-1987)