Correlations between nucleon transfer and fusion at near-barrier energies for the systems32S +100,101Ru and33S +90,91,92Zr |
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Authors: | L Corradi S J Skorka T Winkelmann K Balog P Jänker H Leitz U Lenz K E G Löbner K Rudolph M Steinmayer H G Thies B Million D R Napoli A M Stefanini S Beghini G Montagnoli F Scarlassara C Signorini F Soramel |
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Institution: | 1. Laboratori Nazionali di Legnaro, INFN, I-35020, Padova, Italy 2. Sektion Physik, Universit?t München, W-8046, Garching, Germany 3. Dipartimento di Fisicadell' Universita' and INFN, I-20133, Milano, Italy 4. Dipartimento di Fisicadell' Universita' and INFN, I-35131, Padova, Italy
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Abstract: | Transfer reactions at two near-barrier energies for the systems32S +100,101Ru have been studied. Differential cross sections have been extracted for a large variety of channels, with a set-up yielding good mass, nuclear charge and energy resolutions. A steeper decrease of the measured angular distributions at backward angles with respect to the prediction of a semiclassical theory is interpreted as a loss of transfer flux feeding more complex channels and/or fusion. Coupled channels calculations, which use the transfer form factors derived from the experiment, reproduce the fusion cross sections at sub-barrier energies. Multi-nucleon transfer seems to play an essential role for the fusion process, as evidenced by the found strong correlations. A systematic comparison is made with the systems33S +90,91,92Zr, which have been the object of a previous experimental study with the same set-up. |
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