Metrics Abstract In the scenario of neutron data standards needed to measure neutron fluences and cross-sections of several kinds of reactions, the 235U(n,f) reaction plays a key role. Motivated by significant inconsistencies found in measurements in the 10-30 keV energy range, we measured the energy-dependent cross-section of 235U(n,f) at the n TOF facility from thermal energy to 170 keV, with high energy resolution and uncertainty below 2%. This measurement, based on the two reference reactions 6Li(n,t) and 10B(n,α), allowed to ascertain that the origin of the discrepancies is an overestimation in average of 5% of the cross-section between 9 and 18 keV in major nuclear data libraries.
Cross-section measurement of 235U(n, f) at n TOF from thermal energy to 170 keV
Mengoni A.
2021-01-01
Abstract
Metrics Abstract In the scenario of neutron data standards needed to measure neutron fluences and cross-sections of several kinds of reactions, the 235U(n,f) reaction plays a key role. Motivated by significant inconsistencies found in measurements in the 10-30 keV energy range, we measured the energy-dependent cross-section of 235U(n,f) at the n TOF facility from thermal energy to 170 keV, with high energy resolution and uncertainty below 2%. This measurement, based on the two reference reactions 6Li(n,t) and 10B(n,α), allowed to ascertain that the origin of the discrepancies is an overestimation in average of 5% of the cross-section between 9 and 18 keV in major nuclear data libraries.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
