Speaker
Description
The 1H(n, n)1H reaction is important for fundamental physics research, neutron cross-section standards, and nuclear data evaluation. However, there are few differential cross-section data for this reaction in several MeV neutron energy regions. The relative differential cross sections of the 1H(n, n)1H reaction was measured at the Back-n white neutron source of the China Spallation Neutron Source (CSNS). A 500 nm thick Mylar film was used as the sample for experimental measurements. The charged particles produced by the 1H(n, n)1H reaction were detected using the ∆E−E telescope array and Silicon detector array of the Light-charged Particle Detector Array (LPDA) spectrometer. The relative differential cross sections of the 1H(n, n)1H reaction in the center-of-mass system from 66° to 142° in the neutron energy range from 0.45 MeV to 8.5 MeV were obtained from 8 Silicon detectors in the ∆E−E telescope array and the Silicon detector array. This work is an extension of the previous measurement in the neutron energy range from 6 MeV to 52 MeV. The present results are in good agreement with the previous measurement results and evaluation data.
Keywords: 1H(n, n)1H reaction, differential cross sections, Back-n white neutron source, LPDA
