Search results for " 235U"

Measurement of the α ratio and (n,γ) cross section of 235U from 0.2 to 200 eV at n_TOF

2020

We measured the neutron capture-to-fission cross-section ratio (α ratio) and the capture cross section of 235U between 0.2 and 200 eV at the n_TOF facility at CERN. The simultaneous measurement of neutron-induced capture and fission rates was performed by means of the n_TOF BaF2 Total Absorption Calorimeter (TAC), used for detection of γ rays, in combination with a set of micromegas detectors used as fission tagging detectors. The energy dependence of the capture cross section was obtained with help of the 6Li(n, t) standard reaction determining the n_TOF neutron fluence ; the well-known integral of the 235U(n, f) cross section between 7.8 and 11 eV was then used for its absolute normalizat…