Elastic and inelastic scattering of 12C ions at intermediate energies |
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| Institution: | 1. Tomsk Polytechnic University, 634050 Tomsk, Russia;2. Stepanov Institute of Physics, 220072 Minsk, Belarus;3. Budker Institute of Nuclear Physics, 630090 Novosibirsk, Russia;4. Novosibirsk State University, 630090 Novosibirsk, Russia;1. Faculty of Physics, University of Warsaw, PL 00-681 Warsaw, Poland;2. Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, USA;3. Oak Ridge Associated Universities, Oak Ridge, TN 37831, USA;4. Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;5. Heavy Ion Laboratory, University of Warsaw, PL 02-093 Warsaw, Poland;6. Louisiana State University, Baton Rouge, LA 70803, USA;7. Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235, USA;1. Radiation Measurement Research Section, National Institute of Radiological Sciences, Chiba 263-8555, Japan;2. Particle Therapy Division, Research Center for Innovative Oncology, National Cancer Center, Chiba 277-8577, Japan;3. Research Institute of Nuclear Engineering, University of Fukui, Fukui 914-0055, Japan;4. College of Industrial Technology, Nihon University, Chiba 275-8576, Japan;5. Nuclear Engineering, Applied Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden;6. Department of Physics, Oklahoma State University, 74074 OK, USA;1. Universität Hamburg, ZNF, Hamburg, Germany;2. Federal Institute for Geosciences and Natural Resources (BGR), Hannover, Germany;3. Federal Office for Radiation Protection (BfS), Freiburg, Germany;1. Laboratory of Nuclear Problems, JINR, RU-141980 Dubna, Russia;2. Department of Physics, M.V. Lomonosov Moscow State University, RU-119991 Moscow, Russia;3. Dubna State University, RU-141980 Dubna, Russia;4. Physics and Astronomy Department, UCL, Gower Street, London WC1E 6BT, United Kingdom |
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| Abstract: | Elastic and inelastic scattering of 12C ions on 12C and 208Pb targets have been measured at the incident energies per nucleon E / A = 120 MeV/u and E / A = 200 MeV/u. Optical-model analysis is reported and nuclear surface transparency effects are discussed, together with the nuclear potential-energy dependence. The transparency region extends down to a radial internuclear distance of about 3 fm for the 12C-12C system and 8 fm for the 12C-208Pb system. A decrease of the imaginary potential with increasing incident energy is deduced for the two systems. Anomalous collapse of the real potential in the surface region is observed for 12C-208Pb system at 200 MeV/u. DWBA analysis of data on the 2+, 4.4 MeV state of 12C is reported and trends for the energy dependance of mean-field excitations are deduced. |
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