Elastic and inelastic scattering of 1.03 GeV 12C projectiles
Abstract
Elastic scattering cross sections of 86 MeV/N 12C ions on 12C, NATCa, 89Y and 208Pb targets has been measured together with inelastic scattering to the 4.4 MeV state of 12C. There is some indication for giant (quadrupole) resonance excitation in 40Ca. Optical model and DWBA analyses are reported. Nuclear transparency effect is discussed.
References (15)
- G.R. Satchler et al.
Phys. Rep.
(1979) - J.C. Peng et al.
Phys. Lett.
(1981) - K.H. Muller
Phys. Lett.
(1980) - T. Izumoto et al.
Phys. Lett.
(1980) - G.R. Satchler
Nucl. Phys.
(1967) - R. Schaeffer
- R.M. DeVries et al.
Phys. Rev. Lett.
(1979)
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