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High-energy γ-rays in α-accompanied spontaneous fission of 252 C f
Authors:P Singer  M Mutterer  Yu N Kopach  M Klemens  A Hotzel  D Schwalm  P Thirolf  M Hesse
Institution:1. Institut für Kernphysik, Technische Hochschule, D-64289, Darmstadt, Germany
2. Frank Laboratory of Neutron Physics, JINR, Dubna, Russia
3. Max-Planck-Institut für Kernphysik, D-69115, Heidelberg, Germany
4. Physikalisches Institut der Universit?t, D-72076, Tübingen, Germany
Abstract:An experiment was performed on prompt γ-ray emission in binary and α-particle accompanied spontaneous fission of 252 C f using the Darmstadt-Heidelberg 4π NaI Crystal Ball spectrometer. The enhancement in γ-ray yield, denoted as the “high-energy component”, which appears between 3.5 and 8 MeV and in the region of near-symmetric fragment mass splits, was observed to be equally pronounced in both fission modes. Analyzing the fragment mass dependence of the mean γ-ray multiplicity in both fission modes clearly identifies the disintegration of equilibrated fission fragments in a narrow mass range around the double-magic 132Sn as the source of these γ-rays.
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