Prompt fission neutron emission: Problems and challenges

Simulation of Neutron and Gamma Ray Emission from Fission

Limitations to presaddle neutron emission from fission-fragment charge distributions.

The e8'ect of including mass-asymmetry dependent 6ssion delay times into the statistical model has been investigated. The shape of the predicted charge distribution of fission fragments is found to be very sensitive to the magnitude and mass-asymmetry dependence of these delay times. Measured mass-asymmetry dependent prefission neutron multiplicities were fit with calculated presaddle values by...

Measurement of Prompt Fission Neutron Spectrum Using a Gamma Tagging Method

Since its discovery 75 years ago fission has been at the forefront of nuclear science and engineering research. Although the fission process is being used worldwide to generate safe reliable power, there are several aspects of the fission process which are still not well known. One such parameter of the fission process is the prompt fission neutron spectrum (PFNS). Although the average number o...

A method to measure prompt fission neutron spectrum using gamma multiplicity tagging

In order to improve on current prompt fission neutron spectrum measurements, a gamma multiplicity tagging method was developed at the Rensselaer Polytechnic Institute Gearttner Linear Accelerator Center. This method involves using a coincidence requirement on an array of BaF2 gamma detectors to determine the timing of a fission event. This allows for much larger fission samples to be used due t...

Event-by-event evaluation of the prompt fission neutron spectrum from 239Pu(n, f)