Quasifree sup 12 C(. pi. sup + , p ) reaction and the. pi. N amplitude in nuclei

Journal Article · Fri Mar 01 04:00:00 EST 1991 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.43.1454· OSTI ID:6042744

Kishimoto, T; Iseki, Y; Nagasawa, H; Akei, M; Ejiri, H; Fukuda, M; Irie, T; Kashitani, A; Noumi, H; Ohsumi, H; Okuda, K ^[1]; Fukuda, T; Hashimoto, O; Nagae, T; Shibata, T; Toyama, S ^[2]

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1. Department of Physics, Faculty of Science, Osaka University, Toyonaka, Osaka, 560 (Japan)
2. Institute of Nuclear Study, University of Tokyo, Tanashi, Tokyo, 188, (Japan)

Protons knocked out of {sup 12}C by quasifree pion scattering at {ital P}{sub {pi}}{similar to}500 MeV/{ital c} were measured at forward angles. The effective nucleon number of the reaction was derived from the energy-integrated cross section divided by the {ital p}({pi}{sup +},{ital p}){pi}{sup +} reaction cross section measured simultaneously by using a CH{sub 2} target. The effective nucleon numbers obtained are roughly three times larger than the distorted-wave impulse approximation calculation. It is shown that the difference is due to the change of the {pi}{ital N} amplitude in a nucleus because there nucleons are bound and off-mass shell.

• OSTI ID: 6042744
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 43:3; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
CARBON 12 TARGET
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DIRECT REACTIONS
DISTORTED WAVE THEORY
DISTRIBUTION
ENERGY RANGE
HADRON REACTIONS
HARMONIC OSCILLATOR MODELS
IMPULSE APPROXIMATION
KNOCK-OUT REACTIONS
MASS SPECTRA
MATHEMATICAL MODELS
MESON REACTIONS
MEV RANGE
MEV RANGE 100-1000
MONTE CARLO METHOD
NUCLEAR MODELS
NUCLEAR REACTIONS
PION PLUS REACTIONS
PION REACTIONS
QUASI-FREE REACTIONS
SHELL MODELS
SPECTRA
TARGETS
TIME-OF-FLIGHT METHOD
TOTAL CROSS SECTIONS