Energy loss and nucleon exchange in the reaction of 86Kr with 166Er |
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Authors: | G. Rudolf A. Gobbi H. Stelzer U. Lynen A. Olmi H. Sann R.G. Stokstad D. Pelte |
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Affiliation: | GSI, D-6100 Darmstadt, Germany;Max-Planck-Institut für Kernphysik, D-6900 Heidelberg, Germany;GSI and Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA;I. Physikalisches Institut, Universität Heidelberg, D-6900 Heidelberg, Germany |
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Abstract: | Projectile-like products from the reaction 86Kr on 166Er at 8.18 MeV/amu have been measured using a large-area position-sensitive ionization chamber. The observed element distributions for a given energy loss are found to be asymmetric. An analysis of the data in terms of the residual kinetic energy above the Coulomb barrier, however, yields symmetric and Gaussian-shaped element distributions. At large energy losses, the centroids of these Gaussian distributions exhibit a drift towards symmetric mass splits. The correlation between the variance of the element distribution σz2 and the number of exchanged nucleons Nex is discussed. The exchange mechanism, as described by a simple one-body dissipation model, can account for a large portion of the measured energy loss. |
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Keywords: | Nuclear reactions |
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