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Journal Articles

High accuracy, high resolution $$^{235}$$U(n,f) cross section from n_TOF (CERN) from 18 meV to 10 keV

Mastromarco, M.*; Amaducci, S.*; Colonna, N.*; Kimura, Atsushi; 118 of others*

European Physical Journal A, 58(8), p.147_1 - 147_13, 2022/08

 Times Cited Count:0 Percentile:54.36(Physics, Nuclear)

Journal Articles

Measurement of the $$^{235}$$U(n, f) cross section relative to the $$^{6}$$Li(n, t) and $$^{10}$$B(n, $$alpha$$) standards from thermal to 170 keV neutron energy range at n_TOF

Amaducci, S.*; Harada, Hideo; Kimura, Atsushi; 118 of others*

European Physical Journal A, 55(7), p.120_1 - 120_19, 2019/07

 Times Cited Count:18 Percentile:90.63(Physics, Nuclear)

The $$^{235}$$U(n, f) cross section was measured at n_TOF relative to $$^{6}$$Li(n, t) and $$^{10}$$B(n, $$alpha$$), in a wide energy range (25 meV$$sim$$170 keV) with 1.5% systematic uncertainty, making use of a stack of six samples and six silicon detectors placed in the neutron beam. The present results indicate that the cross section in the 9$$sim$$18 keV neutron energy range is indeed overestimated by almost 5% in the recently released evaluated data files ENDF/B-VIII.0 and JEFF3.3. Furthermore, these new high-resolution data confirm the existence of resonance-like structures in the keV neutron energy region. From the present data, a value of 249.7$$pm$$1.4(stat)$$pm$$0.94(syst) b eV has been extracted for the cross section integral between 7.8 and 11 eV, confirming the value of 247.5$$pm$$3 b eV recently established as a standard.

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