PHENIICS Doctoral School Days

study of prompt gamma emission in the fission mechanism

May 9, 2016, 3:30 PM

1h

Auditorium Pierre Lehmann (Laboratoire de l'Accélérateur Linéaire (LAL))

Board: 22

Poster Nuclear Physics Poster session

Speaker

Mr Liqiang QI (IPN NESTER)

Description

Presented here is my work on the study of prompt gamma emission in the fission mechanism. From a nuclear reactor physics point of view, it addresses the gamma heating issue in nuclear reactor cores. On the other hand, gamma emission can help understand the fission process in terms of fundamental physics. Results from experiments in 2016 at ALTO(Linear Accelerator and Tandem Orsay) by using the LICORNE neutron source, to study prompt fission gamma rays of U-238 at neutron energies of 1.7MeV and 4.5MeV. LICORNE can generate natural focusing of fast neutrons by inverse kinematics reaction: p(7Li, n)7Be and p(11B,n)11C. This feature allows the placement of detectors close to the target with low neutron background from the source. In this experiment, several types of scintillator were used to detect gamma rays, including LaBr3, BaF2 and a new type of phoswich named PARIS. The measured spectra will be deconvoluted by using response matrices simulated in GEANT4.