New Results on Helium and Tritium Gas Production From Ternary Fission
- CEA Cadarache, DEN/DER/SPRC/LEPh, F-13108 Saint Paul-Lez-Durance (France)
- Dept. of Subatomic and Radiation Physics, University of Gent, B-9000 Gent (Belgium)
- EC-JRC-Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel (Belgium)
Ternary fission constitutes an important source of helium and tritium gas production in nuclear reactors and in used fuel elements. Data related to this production are therefore requested by nuclear industry. In the present paper, we report results from measurements of the 4He and 3H emission probabilities (denoted LRA/B and t/B, respectively). These measurements concern both thermal neutron-induced fission reactions as well as spontaneous fission decays. For spontaneous fission, data are reported for nuclides ranging from 238Pu up to 252Cf. For thermal neutron-induced fission, results cover target nuclei between 229Th and 251Cf. Based on these and other results, semi-empirical relations are proposed. These correlations are only valid if spontaneous fission data and neutron-induced fission data are considered separately, which shows the impact of the fissioning nucleus-excitation energy on the ternary particle-emission process. In this way, t/B and LRA/B values could be evaluated for fissioning systems not investigated so far. These results could be used for the ternary fission-yield evaluation of the JEFF3.1 library.
- OSTI ID:
- 20722698
- Journal Information:
- AIP Conference Proceedings, Vol. 769, Issue 1; Conference: International conference on nuclear data for science and technology, Santa Fe, NM (United States), 26 Sep - 1 Oct 2004; Other Information: DOI: 10.1063/1.1945141; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CALIFORNIUM 251
CALIFORNIUM 252
CORRELATIONS
EMISSION
EXCITATION
FISSION PRODUCTS
FUEL ELEMENTS
HELIUM
HELIUM 4
NUCLEAR FUELS
NUCLEAR REACTION YIELD
PLUTONIUM
PLUTONIUM 238
PROBABILITY
REACTOR FUELING
SPONTANEOUS FISSION
TERNARY FISSION
THERMAL NEUTRONS
THORIUM 229
TRITIUM