Analysis of total neutron-nucleus cross sections using relativistic impulse approximation

Journal Article · Wed Mar 31 23:00:00 EST 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.1697· OSTI ID:6611013

Jin, Y; Finlay, R W ^[1]

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1. Physics Department, Ohio University, Athens, Ohio 45701 (United States)

We have used the relativistic impulse approximation (RIA) to study the newly measured neutron total cross section data for [sup 208]Pb, [sup 90]Zr, and [sup 40]Ca. In particular, we are interested in what we can learn from the RIA in order to build up a phenomenological optical potential. A complete set of scattering observables would be required in order to study the details of the neutron-nucleus interaction. In the absence of any such data at intermediate energy, the present study of total cross sections provides useful preliminary information on the isovector part of a generalized nucleon-nucleus interaction. We used the [ital NN] amplitude calculated by McNeil, Ray, and Wallace (MRW) and the relativistic Love-Frany [ital NN] amplitude developed by Murdock and Horowitz (MH). We found that the use of MH's amplitude in the RIA gives a good description to the neutron total cross section from 200 to 400 MeV, while the use of MRW's amplitude provides a good description from 500 MeV and above. The energy dependence of the volume integrals of the total optical potential is consistent from both calculations, but there is a large difference in the energy dependence of the volume integral of the isovector part of the potential.

• OSTI ID: 6611013
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 47:4; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BARYONS
BOSONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DELTA BARYONS
DIFFERENTIAL CROSS SECTIONS
ELEMENTARY PARTICLES
ENERGY
ENERGY SPECTRA
EXCITATION FUNCTIONS
FERMIONS
FUNCTIONS
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
INELASTIC SCATTERING
INTERACTIONS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
N BARYONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PARTICLE INTERACTIONS
PION-NUCLEON INTERACTIONS
PIONS
PIONS PLUS
PROTON REACTIONS
PSEUDOSCALAR MESONS
SCATTERING
SELF-ENERGY
SPECTRA