| Abstract: | An experiment of neutron resonances in 159Tb 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 6Li-glass and Moxon Rae detectors at the 47 m station; the neutron flux was monitored with a 6Li-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 2gΓ0 n Γ and Γγ Resonance parameters of 209 levels below 1.2 keV are obtained, and 52 levels between 754eV and 1.2keV are new ones. The results are; average level spacing <D>=4.4±0.4eV below 600 eV, s-wave strength function S0=(1.55 ±0.15)104 below 1.2 keV, and average radiation width <Γγ>=107±7 meV for lower 25 levels. Average capture cross section <σc> were obtained from 50 eV to 30keV. |
