50 MeV. pi. sup + and. pi. sup minus scattering from sup 12 C

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.41.1668· OSTI ID:7001569

Ritchie, B G ^[1]; Escalante, J A; Preedom, B M; Adams, G S; Blanpied, G S; Mishra, C; Whisnant, C S ^[2]; Mitchell, J H; Peterson, R J ^[3]; Boudrie, R L ^[4]; Wright, D H ^[5]

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1. Arizona State University, Tempe, Arizona 85287 (USA)
2. University of South Carolina, Columbia, South Carolina 29203 (USA)
3. University of Colorado, Boulder, Colorado 80309 (USA)
4. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
5. Virginia Polytechnical Institute and State University, Blacksburg, Virginia 24061 (USA)

Differential cross sections were measured for 50 MeV {pi}{sup +} and {pi}{sup {minus}} elastic scattering from {sup 12}C and for 50 MeV {pi}{sup +} inelastic scattering to the (4.44 MeV, 2{sup +}), (7.65 MeV, 0{sub 2}{sup +}), (9.64 MeV, 3{sup {minus}}), (12.71 MeV, 1{sup +}), and (15.11 MeV, 1{sup +}) levels in {sup 12}C. Comparisons of the data obtained in this study to data taken previously for these states resolve discrepancies between the earlier data sets. Using a recently discussed procedure, one-step and coupled-channels calculations using a modified MSU potential were performed. The results of both one-step and coupled-channels calculations describe the data for the ground, first, and third excited states, indicative of the collective isoscalar structure of those states. The one-step analysis fails to describe the excitation of the 0{sub 2}{sup +} state. The coupled-channels calculations are more successful in describing those data, indicating that the failure of the one-step calculations may be attributed to coupled-channels effects.

• OSTI ID: 7001569
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 41:4; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
CARBON 12
CARBON 12 TARGET
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
COUPLED CHANNEL THEORY
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELASTIC SCATTERING
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
HADRON REACTIONS
INELASTIC SCATTERING
IONIZATION CHAMBERS
ISOTOPES
LAMPF LINAC
LIGHT NUCLEI
LINEAR ACCELERATORS
MEASURING INSTRUMENTS
MESON FACTORIES
MESON REACTIONS
MEV RANGE
MEV RANGE 10-100
NUCLEAR REACTIONS
NUCLEI
PARITY
PARTICLE PROPERTIES
PION MINUS REACTIONS
PION PLUS REACTIONS
PION REACTIONS
RADIATION DETECTORS
SCATTERING
SPIN
STABLE ISOTOPES
TARGETS