Relativistic analyses of inelastic nucleon-nucleus scattering

Thesis/Dissertation · Sat Dec 31 23:00:00 EST 1988

OSTI ID:5909381

Shim, S

A coupled channel calculation for inelastic nucleon-nucleus scattering is presented in the Dirac formalism. The author considers several spherically symmetric target nuclei such as {sup 40} Ca {sup 48}Ca, {sup 90}Zr and {sup 208} Pb, and two deformed nuclei, {sup 12}C and {sup 154}Sm. Incident proton energies from 360 MeV to 1040 MeV are investigated. Both the Dirac phenomenological optical potentials in a Woods-Saxon form, and the relativistic impulse approximation optical potentials are used for the direct channel potentials. Most of the cases, he considers only the Lorentz scalar and the time-like component of Lorentz four-vector potentials. To provide the transition potentials he uses macroscopic collective models. A vibrational model, which is patterned after the nonrelativistic vibrational model, is used to describe the collective motion of the excited nucleons in spherically symmetric nuclei, and a rotational model is used to describe the excitations in deformed nuclei. The observables are calculated using a Dirac coupled channel approach. He finds that the effects of channel coupling on the elastic observables is large at high momentum transfer and that the agreement with experiment is improved by including the strongly coupled low lying excited states. He finds that the low lying excited states of spherical nuclei are well reproduced using the collective models described in this work.

• Research Organization: Ohio State Univ., Columbus, OH (USA)
• OSTI ID: 5909381
• Country of Publication: United States
• Language: English

Related Subjects

653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CALCIUM 40 TARGET
CALCIUM 48 TARGET
CARBON 12 TARGET
CHARGED-PARTICLE REACTIONS
COLLECTIVE MODEL
COUPLED CHANNEL THEORY
DEFORMED NUCLEI
DIRAC APPROXIMATION
ENERGY RANGE
HADRON REACTIONS
INELASTIC SCATTERING
LEAD 208 TARGET
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
MOMENTUM TRANSFER
NUCLEAR MODELS
NUCLEAR POTENTIAL
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
POTENTIALS
PROTON REACTIONS
RELATIVISTIC RANGE
SAMARIUM 154 TARGET
SCATTERING
TARGETS
ZIRCONIUM 90 TARGET