International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07459

Development of a determination method of the prompt γ-ray emission probability for the measurement of neutron capture cross sections

I. Miyazaki¹, H. Hayashi¹, A. Tojo¹, A. Taniguchi² and M. Shibata<sup>3

1</sup>  Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
²  Research Reactor Institute, Kyoto University, Kumatori 590-0494, Japan
³  Radioisotope Research Center, Nagoya University, Nagoya 464-8602, Japan

h052305d@mbox.nagoya-u.ac.jp

Published online: 21 May 2008

Abstract
We propose a promising method of the determination of the emission probabilities by normalizing the sum of the relative intensities of the γ-rays populating the ground state. The prompt γ-rays from thermal-neutron capture in ²³Na, ²⁷Al, ⁵¹V, ⁵⁵Mn, ⁵⁹Co, ¹⁴¹Pr, ¹⁸⁶W and ¹⁹⁷Au were measured and the emission probabilities by this method were deduced. The experiment was performed at the supermirror neutron guide tube at the Kyoto University Reactor. For the nucleus ²⁴Na, the emission probabilities were deduced and they were in agreement with the values, which were deduced by using the γ-rays following the β-decay, within the uncertainties of approximately 5%.

© CEA 2008