Title: Modelling of the total excitation energy partition including fragment deformation and excitation energies at scission
Citation: JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS vol. 39 no. 5 p. 055103 (15pp)
Publication Year: 2012
JRC Publication N°: JRC66414
ISSN: 0954-3899
URI: http://stacks.iop.org/JPhysG/39/055103
DOI: 10.1088/0954-3899/39/5/055103
Type: Articles in Journals
Abstract: In the frame of refined prompt-neutron emission models used for evaluation purposes the partition of the total excitation energy (TXE) between fully accelerated fission-fragments plays an important role. In this work the TXE partition between complementary fission fragments is obtained by taking into account the energy components at scission. The method consists of two steps: the calculation of additional deformation energies of nascent fragments (which are relaxed into excitation energy at full acceleration) and the partition of the available excitation energy at scission (obtained by subtracting the calculated deformation energies from TXE) assuming statistical equilibrium. The obtained fragment excitation energies, as the sum of deformation and excitation energy components at scission, are then used in the frame of the Point-by-Point model to describe experimental data of prompt fission quantities. The presented procedure of TXE partition is based exclusively on models and straightforward assumptions without the need of adjustable parameters. It allows predicting prompt neutron emission data and, therefore, may be successfully used for evaluation purposes.
JRC Institute:Institute for Reference Materials and Measurements

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