Abstract
Abstract The neutron total cross-section of natCr plays a crucial role in new nuclear engineer design and fundamental science. A new measurement of neutron-induced total cross-sections of natCr has been performed using the transmission method on the back-streaming white neutron beamline (Back-n) at the China Spallation Neutron Source (CSNS). Neutron energy was determined using the time-of-flight technique. The neutron total cross-sections of natCr have been obtained across an exceptionally broad energy range (0.3 eV-20 MeV) with one experiment for the first time. The resulting effective total cross-sections has been compared with the existing experimental data in different energy ranges, and a good agreement with the evaluated libraries has been found. Theoretical calculation of the total cross-section in the energy range of 1.5 MeV to 20 MeV has been conducted using the TALYS-1.96 and compared with the present results. The measurement provides a high-quality total cross-section of natCr including detailed uncertainty data across a wide energy range, offering a valuable reference for nuclear data re-evaluating and nuclear engineering design.
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