The (N,N[prime][pi]) reaction on light nuclei at intermediate energies

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1992

OSTI ID:7103745

Mehrem, R A.K.

The direct nuclear reaction (N,N[prime][pi]) on light nuclei is investigated using an intermediate isobar model. Cross sections for this exclusive reaction will be calculated in the distorted wave approximation. This reaction involves an incident nucleon of energy 300-800 MeV (in the incident nucleon-nucleus center of mass) scattering from a closed shell target, with the detection of a final nucleon and a produced pion in coincidence. The residual nucleus is assumed to be in a particle-hole state of arbitrary angular momentum and isospin. This reaction allows for a small momentum transfer to the nucleus (1 fm[sup [minus]1]) so that the nuclear structure is relatively well known. This microscopic model involves an intermediate pion propagating in nuclear matter, which allows a study of the effect of the many-body self energy of the virtual pion on the pion production mechanism. By considering different spin and parity nuclear final states, the nucleus is used as a spin isospin filter to select out certain amplitudes allowing one to isolate particular diagrams and study them independently. As an example, a detailed numerical study of the coincidence reaction of [sup 16]O will be performed. The results will be of interest to experimentalists as well as theorists because of the need to know the kinematical regions of importance for coincidence experiments of this type. Such coincidence experiments may be useful for studying various aspects of the production and propagation of mesons and isobars in nuclei.

• Research Organization: Indiana Univ., Bloomington, IN (United States)
• OSTI ID: 7103745
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYONS
BOSONS
CROSS SECTIONS
DIRECT REACTIONS
ELEMENTARY PARTICLES
FERMIONS
HADRON REACTIONS
HADRONS
ISOBAR MODEL
LIGHT NUCLEI
MATHEMATICAL MODELS
MESONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
PARTICLE MODELS
PIONS
PSEUDOSCALAR MESONS