Fission probabilities of Cu,Nb, Ag,Ho, Au and Bi nuclei excited by stopped antiprotons |
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Authors: | D. I. Ivanov A. S. Iljinov M. V. Mebel V. G. Nedorezov A. S. Sudov A. A. Turinge T. von Egidy S. Schmid W. Schmid H. Rossner J. Eades |
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Affiliation: | 1. Institute for Nuclear Research, 117312, Moscow, Russia 2. Kurchatov Institute, 123182, Moscow, Russia 3. Technische Universit?t München, D-85748, Garching, Germany 4. Hahn-Meitner Institut, D-14109, Berlin, Germany 5. CERN, CH-1211, Geneva 23, Switzerland
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Abstract: | The A dependence of nuclear fission induced by stopped antiprotons has been measured. An unambiguous identification of the binary fission decay mode was provided by a coordinate measurement of complementary fission fragments in coincidence using a large-acceptance fission detector based on low pressure multiwire proportional chambers. A deep fissility minimum was observed nearA=100, in agreement with the general behaviour predicted by the liquid-drop model. An unexpectedly low and high fission probability was found for the Ag and Cu nuclei, respectively. |
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