Journal
RADIATION PHYSICS AND CHEMISTRY
Volume 205, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.radphyschem.2022.110738
Keywords
Neutron capture cross section; Neutron activation method; 174Yb(n?)175Yb reaction; 197Au(n?)198Au monitor reaction; HPGe detector; Off-line ?-ray spectrometry
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In this study, the thermal neutron capture cross section and resonance integral of the 174Yb(n,γ)175Yb reaction were measured relative to the reference reaction 197Au(n,γ)198Au. The experiments were conducted using the activation method combined with Cd ratio method and offline gamma-ray spectrometry. The results were compared with the measured and evaluated data.
Herein, we measured the thermal neutron capture cross section (sigma 0) and resonance integral (I0) of the 174Yb (n,gamma)175Yb reaction relative to those of the reference reaction 197Au(n,gamma)198Au. Measurements were conducted based on the activation method using pulsed neutrons combined with the Cd ratio method and offline gamma-ray spectrometry. Pulsed neutrons were generated on a 100 MeV electron linac of the Pohang Accelerator Labora-tory, Korea. Yb samples and Au monitors were irradiated with and without a 0.5 mm Cd cover to absorb thermal neutrons. The neutron flux was determined via the 115In(n,gamma)116mIn reaction. The induced activities of the re-action products were measured using a gamma spectrometer based on a well-calibrated HPGe detector. For the 174Yb(n,gamma)175Yb reaction, the thermal neutron capture cross section and resonance integral cross-section were obtained as sigma 0,Yb = 70.5 +/- 4.2 b and I0,Yb = 54.1 +/- 4.2 b, relative to the corresponding values of sigma 0,Au = 98.65 +/- 0.09 b and I0,Au = 1550 +/- 28 b for the 197Au(n,gamma)198Au reference reaction. The obtained results were compared with the measured and evaluated data.
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