Measurement of the fast-neutron fission cross sections of231Pa and243Am

Measurement of the236U(n,f) cross section from 170 meV to 2 MeV at the CERNSarmento1, Calviani2, Praena3 et al. 2011Phys. Rev. C16060View full textAdd to dashboardCite

“…The results above the threshold at 690 keV for the fission cross-section ratio of 236 U and 235 U are shown in Fig. 9, together with several previous results [9,14,15,[21][22][23][24]. The values of the 236 U(n,f ) cross section above threshold are also given in Table IV, Good agreement was also found for all major evaluations (the difference between ENDF/B-VII.0 and JENDL-3.3 up to 2 MeV is below 5%, while a slightly larger difference, still below 15%, is observed for JEFF-3.1).…”

“…The origin of most of such shortcomings is related to the poor quality of the early experimental data below the fission threshold (690 keV), on which evaluations are still based. Above this value, there are several absolute cross-section measurements and measurements relative to the 235 U(n,f ) cross section performed up to 20 MeV which are in good agreement with each other [9,10,14,15,[21][22][23][24]. As a consequence, the evaluated cross sections above the fission threshold are more accurate, with small differences between the various databases.…”

Measurement of the neutron-induced fission cross-section of 243Am relative to 235U from 0.5 to 20 MeV

“…Existing experimental data have been obtained in a number of measurements [3][4][5][6][7][8][9][10][11][12]. However, severe discrepancies among these data are limiting the accuracy of evaluated data files to ≈10%.…”

Study of Neutron-Induced Fission Cross Sections of U, Am, and Cm at ṉTOF

“…Moreover, discrepancies up to 15% between data from different measurements [7][8][9][10] are present in the fast neutron energy region for the 243 Am(n,f) cross section; stringent requirements for this cross section were found for Advanced Minor Actinides Burners (ADMAB), where a reduction of a factor 5 of the uncertainty is requested. Moreover, discrepancies up to 15% between data from different measurements [7][8][9][10] are present in the fast neutron energy region for the 243 Am(n,f) cross section; stringent requirements for this cross section were found for Advanced Minor Actinides Burners (ADMAB), where a reduction of a factor 5 of the uncertainty is requested.…”