Fission fragment yields and total kinetic energy release in neutron-induced fission of235,238U,and239Pu

F Tovesson,D Duke,D Mayorov,V Geppert-Kleinrath,B Manning,S Mosby,K Schmitt,F.-J Hambsch,I Ruskov,N Carjan

doi:10.1051/epjconf/201816900024

F Tovesson, D Duke + Show 8 more

Open Access

https://doi.org/10.1051/epjconf/201816900024

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Journal: EPJ web of conferences	Publication Date: Jan 1, 2018
Citations: 7	License type: CC BY 4.0

Affiliation: Los Alamos National Laboratory

Abstract

Different aspects of the nuclear fission process have been studied at Los Alamos Neutron Science Center (LANSCE) using various instruments and experimental techniques. Properties of the fragments emitted in fission have been investigated using Frisch-grid ionization chambers, a Time Projection Chamber (TPC), and the SPIDER instrument which employs the 2v-2E method. These instruments and experimental techniques have been used to determine fission product mass yields, the energy dependent total kinetic energy (TKE) release, and anisotropy in neutron-induced fission of U-235, U-238 and Pu-239.

Highlights

Fission nuclear data is important for, and impacts the performance of, several nuclear technologies
The total kinetic energy release in fission demonstrates a general trend of decreasing with increasing incident neutron energy [3]
The work presented here shows the current capabilities of studying fission fragment properties at Los Alamos Neutron Science Center (LANSCE)

Summary

Introduction

Fission nuclear data is important for, and impacts the performance of, several nuclear technologies. Of correlated observables, allows us to develop more sophisticated theoretical models and to eventually have truly predictive capabilities for the physics of fission. The technologies that are impacted cover those deployed in service of the nuclear energy, defense, non-proliferation, and nuclear forensics efforts. An experimental program at Los Alamos National Laboratory has been developed to measure several aspects of actinide fission, including product yields and kinetic energy release. These quantities were obtained using different instruments, each designed to capture a measurement of a specific fission observable with high-resolution or with high-statistics. This paper will describe the experiments carried out on U-235, U-238 and Pu-239

Experimental techniques

Ionization chambers

Results

Mass yields

Conclusions and outlook