Measurements of the cross sections for n-d elastic and inelastic scattering at 14.1 MeV

Resolution of discrepancy between backward angle cross-section data for neutron-deuteron elastic scattering

“…The data of Schwartz et al [-8] are systematically higher than that of Shirato et al [12] at angles beyond 140 ~ c.m., while they agree well within the reported uncertainties with the data of Shirato et al [12] and Briillmann et al [13] in the angular region between 60 ~ to 135 ~ c.m., where all three data sets overlap. The measurements of Schwartz et al [-8] were performed at an incident neutron energy of 14.0 MeV, and those of Shirato et al [12] and Brtillmann [13] were done at 14.1 MeV. According to estimates made using 3N calculations, the effect of the 100-keV energy difference changes the magnitude ofda(O)/d~ by less than 1~, which Oem(deg) is not enough to account for the disagreement between the data sets at backward angles.…”

“…The discrepancy between the data becomes more obvious at 14 MeV. The data of Schwartz et al [-8] are systematically higher than that of Shirato et al [12] at angles beyond 140 ~ c.m., while they agree well within the reported uncertainties with the data of Shirato et al [12] and Briillmann et al [13] in the angular region between 60 ~ to 135 ~ c.m., where all three data sets overlap. The measurements of Schwartz et al [-8] were performed at an incident neutron energy of 14.0 MeV, and those of Shirato et al [12] and Brtillmann [13] were done at 14.1 MeV.…”

“…14 our data for an incident neutron energy of 14.0 MeV are shown in comparison to the data of Schwartz et al [8] and to those of Shirato et al [12]. As before the curve is a 3N calculation.…”

“…As before the curve is a 3N calculation. Though the measurements of Shirato et al [12] were performed at 14.1 MeV, it is still valid to use their data in the evaluation of 14.0 MeV data, since according to the results of 3N calculations [6] the 100-keV energy difference should make less than 1% difference in the magnitude of d~(O)/df~ throughout the angular distribution. Based on the agreement of the present data with those of Shirato et al [12] and the quality of the description of these two data sets with the 3N calculations, we conclude that the 14.0 MeV data of Schwartz et al [8-] are too high at backward angles.…”

Measurement and Analysis of Neutron-Induced Alpha Particle Emission Double-Differential Cross Section of Carbon at 14.2 MeV

“…[1][2][3][4][5] Detailed measurements of -particle emission DDX are, however, quite few and are still insufficient. The measurement of -particle emission DDX is fundamentally difficult because a thin sample material has to be used to prevent energy loss of emitted -particles in the sample despite relatively small cross sections.…”