Prompt Neutrons in Correlation with Fission Fragments from 235U(n,f)

Improved knowledge of prompt emission in fission has significant implication on our understanding of the fission process. It is also important for improving nuclear data evaluation with impact on application. Correlation between prompt neutrons and fragments emitted in binary neutron induced fission of 235U has been studied at the GELINA facility. The experiment employs an array of proton recoil scintillators and a position sensitive twin ionization chamber. This experimental arrangement permits measurement of the correlations between neutron emission, fragment angle, mass and energy of the fission fragments. In this article, we present results on prompt fission neutron energy and multiplicity correlations with mass and TKE of the fission fragments. Results from the present measurement shows distinct differences towards earlier studies of the correlated fission fragment and prompt neutron emission quantities. The differences with respect to earlier investigations are interpreted as improved fission fragment energy resolution in the present measurement. The present result supports several recent model calculations of prompt neutron and fission fragment correlations.

GÖÖK Alf;  HAMBSCH Franz-Josef;  OBERSTEDT Stephan;  VIDALI Marzio; 

2018-11-12

AMER PHYSICAL SOC

JRC111312

2469-9985 (online),   

https://publications.jrc.ec.europa.eu/repository/handle/JRC111312,   

10.1103/PhysRevC.98.044615 (online),