Neutron capture cross section measurements of 151,153Eu using a pair of C6D6 detectors |
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Authors: | Jaehong Lee Jun-ichi Hori Tadafumi Sano Samyol Lee |
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Affiliation: | 1. Department of Nuclear Engineering, Kyoto University, Kyoto, Japan;2. Research Reactor Institute, Kyoto University, Osaka, Japan;3. Department of Radiological Science, Dongseo University, Busan, Korea |
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Abstract: | We have measured the neutron capture cross sections of 151Eu and 153Eu by the time-of-flight (TOF) method in the range from 0.005 eV to keV region using the Kyoto University Research Reactor Institute - Linear Accelerator (KURRI-LINAC). We employed a pair of C6D6 liquid scintillators for the prompt capture γ-ray measurement. The pulse-height weighting technique was employed to obtain the capture yields from the γ-ray spectra of 151,153Eu. The obtained thermal cross sections at 0.0253 eV are 9051 ± 683 b for 151Eu and 364 ± 44 b for 153Eu, respectively. The resonance integrals have been derived as 3490 ± 162 b for 151Eu and 1538 ± 106 b for 153Eu. The obtained capture cross sections were compared with the previously reported experimental data and the evaluated data. The evaluated data in JENDL-4.0 and JEFF-3.2 show good agreement with the present experiment results of 151Eu, however, the evaluated data in ENDF/B-VII.1 are larger than the present experiment results of 151Eu about 10% to 20% in the energy region from 0.03 to 0.2 eV. For the neutron capture cross sections of 153Eu, the evaluated data in ENDF/B-VII.1 and Widder's data are in good agreement with the present results in the energy region below 0.35 eV. |
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Keywords: | Neutron capture cross section 151Eu 153Eu time-of-flight a pair of C6D6 liquid scintillators pulse-height weighting technique KURRI-LINAC |
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