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Volume 294 - The 3rd International Symposium on “Quest for the Origin of Particles and the Universe" (KMI2017) - Poster Presentations
Measurement of Relative Intensity of the discrete $\gamma$ rays from the thermal neutron capture reaction $^{155,157}$ Gd $(n,\gamma)$ using ANNRI detector (JPARC)
P.K. Das,* K. Hagiwara, T. Tanaka, Y. Yamada, I. Ou, M.S. Reen, T. Yano, T. Mori, T. Kayano, R. Dhir, Y. Koshio, M. Sakuda, A. Kimura, N. Iwamoto, S. Nakmura, H. Harada
*corresponding author
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Pre-published on: 2017 November 22
Published on: 2017 November 24
We have measured the discrete $\gamma$ rays from thermal neutron capture on enriched gadolinium targets ($^{155}$Gd and $^{157}$Gd) using the ANNRI Germanium Spectrometer at JPARC. The photo-peak efficiencies were calibrated from 0.2 to 9 MeV using $\gamma$ rays from the standard radioactive sources ($^{60}$Co, $^{152}$Eu) and prompt $\gamma$ rays from $^{35}$Cl$(n,\gamma)$ reaction. We have calculated the relative intensities of discrete $\gamma$ rays from $^{157}$Gd$(n,\gamma)$ reaction. We found that our data are in fair agreement with the values published by NNDC (CapGam). We present the relative intensities of discrete $\gamma$ rays from $^{155}$Gd$(n,\gamma)$ reaction measured for the first time.
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