Investigation of polar emission in 252Cf and 235U + nth fission |
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Authors: | L. Nowicki E. Piasecki J. Sobolewski A. Kordyasz M. Kisieliński W. Czarnacki H. Karwowski P. Koczoń C. Signarbieux |
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Affiliation: | Institute of Nuclear Research, Department I A, PL-05-400 ?wierk, Poland;Departement de Physique Nucléaire, CEN Saclay, 91191 Gif-sur-Yvette, France |
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Abstract: | The energy distributions and relative intensities of protons, deuterons, tritons and α-particles emitted along the fission axis during spontaneous fission of 252Cf were measured simultaneously with both fission fragment energies. The absolute intensity of particles, the mass distribution of fragments, the total kinetic energy and total excitation energy of both fragments were subsequently deduced from the experimental data. Statistical model calculations based on a hypothesis that the polar particles are evaporated from fission fragments have been performed for 252Cf and 236U fission. Although some experimental results agree remarkably well with the evaporation hypothesis, the considered model cannot describe many features of the polar emission phenomenon. |
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Keywords: | Radioactivity |
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