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The neutron capture cross-section of 155Gd and 157Gd have been measured in the neutron energy range from 10 to 90 keV by using the 3-MV Pelletron accelerator of the Research Laboratory for Nuclear Reactors at the Tokyo Institute of Technology. Pulsed keV neutrons were produced from the 7Li(p,n)7Be reaction by bombarding the lithium target with the 1.5-ns bunched proton beam from the Pelletron accelerator. The incident neutron spectrum on a capture sample was measured by means of a TOF method with a 6Li-glass detector. Capture -rays were detected with a large anti- Compton NaI(Tl) spectrometer by employing a TOF method. A pulse-height weighting technique was applied to observed the capture -ray pulse-height spectra to derive capture yields. The capture cross-section were obtained by using the standard capture cross-section of 197Au. The present results were compared with previous measurements and with the evaluated values of ENDF/B-VI.


The neutron capture cross-section of 155Gd and 157Gd have been measured in the neutron energy range from 10 to 90 keV by using the 3-MV Pelletron accelerator of the Research Laboratory for Nuclear Reactors at the Tokyo Institute of Technology. Pulsed keV neutrons were produced from the 7Li(p,n)7Be reaction by bombarding the lithium target with the 1.5-ns bunched proton beam from the Pelletron accelerator. The incident neutron spectrum on a capture sample was measured by means of a TOF method with a 6Li-glass detector. Capture -rays were detected with a large anti- Compton NaI(Tl) spectrometer by employing a TOF method. A pulse-height weighting technique was applied to observed the capture -ray pulse-height spectra to derive capture yields. The capture cross-section were obtained by using the standard capture cross-section of 197Au. The present results were compared with previous measurements and with the evaluated values of ENDF/B-VI.