Excitation and neutron decay of xenon studied by forward-angle scattering of high-energy 17O ions |
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| Institution: | 1. Department of Radiation Sciences, Uppsala University, Box 535, S-75121 Uppsala, Sweden;2. Department of Neutron Research, Uppsala University, Box 535, S-75121 Uppsala, Sweden;3. The Svedberg Laboratory, Uppsala University, Box 533, S-75121 Uppsala, Sweden;4. Institute Jozef Stefan, Jamova 39, P.O. Box 100, Ljubljana, Slovenia;1. CITENI, Campus Industrial de Ferrol, Universidade da Coruña, E-15403 Ferrol, Spain;2. IGFAE, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain;3. AGO department, University of Liège, allée du 6 août 19, bât. B5, B-4000 Liège, Belgium;4. IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France;5. Physics Institute, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland;1. State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China;2. Southern Center for Nuclear-Science Theory (SCNT), Institute of Modern Physics, Chinese Academy of Sciences, Huizhou 516000, China;1. Technische Universität Darmstadt, Department of Physics, 64289 Darmstadt, Germany;2. ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany;3. Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany;4. KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium;5. IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France |
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| Abstract: | Excitation energy spectra and neutron decay of xenon have been measured in extreme forward angle scattering of 250A and 400A MeV 17O ions, using one quadrant of the CELSIUS storage ring as a magnetic spectrometer. The observed excitation energy spectrum, ranging from 12 to 36 MeV, has been compared with Coulomb cross section calculations. Neutron and missing energy spectra are compared with statistical decay calculations using the code CASCADE. In addition to statistical decay from giant resonances and other continuum excitations, a large fraction of forward peaked fast neutrons was observed throughout the entire excitation energy region. A possible reaction mechanism behind these fast neutrons is discussed. |
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