Slow neutron resonances in terbium-159.

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概要

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• An experiment of neutron resonances in <SUP>159</SUP>Tb was carried out using the Japan Atomic Energy Research Institute linac time-of-flight facility. Transmission and capture measurements were made on terbium samples of two thicknesses, using <SUP>6</SUP>Li-glass and Moxon-Rae detectors at the 47 m station ; the neutron flux was monitored with a <SUP>6</SUP>Li-glass transmission type flux monitor. Transmission data were analyzed with an area program up to 1.2 keV, and capture data with Monte-Carlo program CAFIT, to obtain 2gΓ<SUP>0</SUP><SUB>n</SUB>, Γ and Γ<SUB>γ</SUB>. Resonance parameters of 209 levels below 1.2 keV are obtained, and 52 levels between 754 eV and 1.2 keV are new ones. The results are ; average level spacing <D> = 4.4 ± 0.4 eV below 600 eV, s-wave strength function S<SUB>0</SUB> = (1.55 ± 0.15)10<SUP>-4</SUP> below 1.2 keV, and average radiation width <Γ<SUB>γ</SUB>> = 107 ± 7 meV for lower 25 levels. Average capture cross section <σ<SUB>c</SUB>> were obtained from 50 eV to 30 keV.

• 一般社団法人 日本原子力学会の論文

著者

• Ohkubo Makio

  Physics Division Japan Atomic Energy Research Institute

• KAWARASAKI Yuuki

  Physics Division, Tokai Research Establishment, Japan Atomic Energy Research Institute

関連論文

• Slow Neutron Resonances of Antimony
• Neutron Resonance of 59Co at 132 eV
• Slow neutron resonances in terbium-159.

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