Prompt radiation as a probe for fission dynamics |
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Authors: | F F Karpeshin |
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Institution: | 1.St. Petersburg State University,St. Petersburg,Russia |
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Abstract: | It is shown that the Strutinsky-Denisov induced polarization mechanism leads to the appearance of the prompt electric dipole
radiation from fission fragments of 235Uby thermal neutrons in the domain of around 5 MeV. The probability of the radiation is at the level of 0.001 per fission,
which is in agreement with experiment. The angular distribution exhibits left-right asymmetry with respect to the direction
of the neutron polarization axis. That means that the emission of gamma quanta at the given angle depends on the neutron polarization.
The asymmetry is at the level of 10−3. The study of this effect will give a direct information about the scission configuration, nuclear viscosity, and dissipation
properties of the collective energy of the surface vibration in fragments with large amplitude. This will give a complete
picture of the process of snapping back the nuclear surface. |
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Keywords: | |
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