Title: Prompt gamma-ray energy in the frame of prompt neutron emission models
Authors: TUDORA A.MORARIU C.HAMBSCH Franz-JosefOBERSTEDT StephanMANAILESCU C.
Citation: PHYSICS PROCEDIA vol. 31 p. 43-50
Publisher: ELSEVIER BV
Publication Year: 2012
JRC N°: JRC73859
ISSN: 1875-3892
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC73859
DOI: 10.1016/j.phpro.2012.04.007
Type: Contributions to Conferences
Abstract: As output of the Point by Point model (taking into account the entire fission fragment range) and of the most probable fragmentation approach (working with one fragmentation and average values of model parameters) not only prompt neutron quantities are provided but also the prompt gamma-ray energy as a function of fragment Egamma(A) and the total average prompt gamma-ray energy <Egamma>. The almost linear behaviour of the total average <Egamma> with the prompt neutron multiplicity was observed experimentally in the incident neutron energy range where only the first fission chance is involved. This was parameterised as a function of Z and A of the fissioning nucleus. This parameterisation was validated by <Egamma> calculations in the frame of the most probable fragmentation approach. The results describe well the experimental data measured by J.Frehaut from thermal up to about 15 MeV incident energy for three fissioning systems U-235(n,f), Np-237(n,f) and Th-232(n,f).The Point by Point model provides average prompt gamma-ray energy as a function of the fragment pair in very good agreement with the existing experimental data of Cf-252(SF) and U-235(nth,f). The unique experimental data of prompt gamma-ray energy as a function of fragment measured for U-235(nth,f) is very well described by the Point by Point model results obtained by using two methods of total excitation energy partition between complementary fission fragments.
JRC Institute:Institute for Reference Materials and Measurements

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