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Three fission modes of 220Ra

I. V. Pokrovsky, L. Calabretta, M. G. Itkis, N. A. Kondratiev, E. M. Kozulin, C. Maiolino, E. V. Prokhorova, A. Ya. Rusanov, and S. P. Tretyakova
Phys. Rev. C 60, 041304(R) – Published 8 September 1999
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Abstract

Mass-energy distributions of the 220Ra fission fragments produced in the 12C+208Pb reaction at projectile energies higher and deep below the Coulomb barrier have been measured using a two-arm time-of-flight spectrometer CORSET. It has been shown that an asymmetric component appears at the sides of the prevailing symmetric fission with a cooling of the compound nucleus. The component consists of two standard modes with average masses of 132 and 139. A three-component structure has also been observed in the total kinetic energy distributions in the range of asymmetric fission fragment masses.

  • Received 29 March 1999

DOI:https://doi.org/10.1103/PhysRevC.60.041304

©1999 American Physical Society

Authors & Affiliations

I. V. Pokrovsky1, L. Calabretta2, M. G. Itkis1, N. A. Kondratiev1, E. M. Kozulin1, C. Maiolino2, E. V. Prokhorova1, A. Ya. Rusanov3, and S. P. Tretyakova1

  • 1Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, RU-141980 Dubna, Moscow region, Russia
  • 2Laboratorio Nazionale del Sud, Istituto Nazionale di Fisica Nucleare, I-95123 Catania, Italy
  • 3Institute of Nuclear Physics of the National Nuclear Center of Kazakhstan, 480082 Alma-Ata, Kazakhstan

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Vol. 60, Iss. 4 — October 1999

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