Open Access
ND 2007
Article Number 163
Number of page(s) 4
Section Neutron cross section measurements
Published online 17 June 2008
International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07746

Measurements of keV-neutron capture cross sections and capture gamma-ray spectra for Sn and Gd isotopes

J. Nishiyama1, T.I. Ro2, M. Igashira1, W.C. Chung2, G. Kim3, T. Ohsaki1, 4, S. Lee5 and T. Katabuchi1

1  Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Tokyo 152-8550, Japan
2  Department of Physics, Dong-A University, Busan 604-714, Korea
3  Department of Physics, Kyungpook National University, Daegu 702-701, Korea
4  Intellectual Property Bank Corp., Tokyo, Japan
5  Department of Radiological Science, Nambu University, Gwangju 506-824, Korea

Published online: 21 May 2008

The neutron capture cross sections and capture gamma-ray spectra of Sn (116-119Sn) and Gd (155-158Gd) isotopes have been measured in the incident neutron energy region from 10 to 100 keV and at 550 keV. Pulsed keV neutrons were produced by the 7Li(p,n)7Be reaction. Capture gamma rays were detected with a large anti-Compton NaI(Tl) spectrometer by means of a time-of-flight method. A pulse-height weighting technique was applied to the observed capture gamma-ray pulse-height spectra to obtain capture yields. Using the standard capture cross sections of 197Au, the capture cross sections of the Sn and Gd isotopes were derived. The capture gamma-ray spectra were obtained by unfolding the observed capture gamma-ray pulse-height spectra. The present cross section results were compared with other experimental data and evaluated values.

© CEA 2008