ISSN:
1434-601X
Keywords:
PACS: 25.85.Ca Spontaneous fission – 23.20.Lv Gamma transitions and level energies – 27.60.+j 90 ≤ A ≤ 149
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: The high energy γ-ray emission accompanying the spontaneous fission of 252Cf has been measured in coincidence with individual fission fragments selected by discrete γ-ray transitions. The enhancement of the γ-ray emission probability in the energy range Eγ= 3–8 MeV has been observed for the fission fragments in the region of nearly symmetric mass splitting, confirming results reported in previous investigations. The γ-γ coincidence technique employed in the present work clearly demonstrate that the major contribution to this enhancement is caused by the fission channels where one fragment is near to the N= 82 or Z= 50 shell closures. The high energy γ-ray emission probability does not show any significant dependence on the number of neutrons emitted in the fission process, supporting the hypothesis that high energy γ-rays are mainly emitted from the fragments after the neutron evaporation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100500050242
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