Measurement of the 124Xe (n,2n) reaction cross section induced by 14.8 MeV neutron

The measurement of the 124 Xe(n, 2n) 123 Xe reaction cross section at 14.8 MeV neutron has been performed by the activation method. Quasi monoenergetic neutron beams were produced at the Cockcroft Walton Accelerator of China Institute of Atomic Energy, by the T(d, n) 4 He reaction. A cell made of polymethyl methacrylate (PMMA) was used as the container of 124 Xe (99.95% abundance) gas, and the mass of 124 Xe in cell was determined by weighing method. Two high-purity thin 93 Nb foils were attached to the cell and performed as monitors of the neutron flux determination by 93 Nb(n, 2n) 92m Nb reaction. After the irradiation, the activities of 123 Xe and 92m Nb were measured by off-line gamma-ray spectrometric technique using a pre-calibrated HPGe detector. As a result, the cross section has been deduced at 14.8 MeV, and the result was compared with the literature data and evaluations. • The cross section of 124 Xe(n, 2n) 123 Xe reaction has been measured at 14.8 MeV. • The method used were neutron activation and off-line gamma-ray spectrometry. • High purity 124 Xe gas was used as the target sample, and low Z material cell was used as the container.