Neutron Capture Cross Section Measurements of Nb-93, 1-127, Ho-165, Ta-181 and U-238 between 3.2 and 80keV

Abstract

The neutron capture cross sections of 93 Nb, 127 1, 1 "'Ho, mTa and ""'U were measured from 3.2 to 80 keV using the time-of-flight method. The neutron beam was produced by the KURRI 46-MeV linear accelerator and capture r-rays were detected by a C 0 F 0 or C 0 D 6 liquid scintillation detector. As the result of the use of a direct-coupled operational preamplifier, the detector recovered rapidly from the r-flash such that data for higher energy '!eutrons can be obtained in spite of the short flight path of 11.7 m. The neutron sensitivities of both detectors are compared and the superiority of the C 0 D, detector is shown.The experimental results of capture cross sections, corrected for resonance self-shielding and multiple scattering and normalized to the 24-keV absolute values, are shown numerically and graphically, and compared with other data. The agreement between the data is fairly good for 165 Ho and 238 U, but not for 93 Nb, 127 1 and 181 Ta. The discrepancy between the data may be caused by the difference of the reference cross sections used for each experiment.

Measurement of the $$ ^{181} $$Ta($$n,\gamma $$) cross sections up to stellar s-process temperatures at the CSNS Back-n

“…10 b. It shows that the new data are in agreement with the experimental results by Moxon et al 44 , Yamamuro et al 45 and Macklin et al 46 in 2.4–10 keV, Kononov 47 in 10–100 keV, Lindner et al 48 and McDermott 8 in 0.1–1 MeV.…”

Evaluation of the93Nb(n,γ) Reaction Cross-Section

“…The results of 33 experiments have been analysed. A part of the experimental data ( [13][14][15], [17,18], [21], [23], [26], [28][29][30], [35][36][37][38]) was corrected to new recommended monitor reaction cross-sections and decay data. For some data, special corrections were introduced.…”