Search Results - "Yunoki, A."

Evaluation of absolute measurement using a 4π plastic scintillator for the 4πβ−γ coincidence counting method by Unno, Y., Sanami, T., Sasaki, S., Hagiwara, M., Yunoki, A.

“…Absolute measurement by the 4πβ-γ coincidence counting method was conducted by two photomultipliers facing across a plastic scintillator to be focused on β ray…”
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Homogeneity of wheat flour in 5ml containers for certified reference materials by Furukawa, R., Unno, Y., Miura, T., Yunoki, A., Hachinohe, M., Hamamatsu, S.

“…We aimed to develop certified reference materials that could be used for well-type HPGe detector. We chose wheat flour as a sample and evaluated the…”
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Simulation technique for extrapolation curves in 4πβ–γ coincidence counting method using EGS5 code by Unno, Y., Sanami, T., Sasaki, S., Hagiwara, M., Yunoki, A.

“…A simulation technique was developed for the extrapolation technique in 4πβ–γ coincidence counting method. Simultaneous emissions of β and γ rays were…”
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Gamma geometry dependency of efficiency functions in the 4 pi beta - gamma coincidence measurements of complex decaying nuclides by Kawada, Y, Yunoki, A, Yamada, T, Hino, Y

“…In order to clarify the gamma -efficiency dependency of 4 pi beta - gamma efficiency functions, a series of 4 pi beta - gamma efficiency extrapolation…”
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Gamma geometry dependency of efficiency functions in the 4πβ-γ coincidence measurements of complex decaying nuclides by Kawada, Y., Yunoki, A., Yamada, T., Hino, Y.

“…In order to clarify the γ-efficiency dependency of 4πβ-γ efficiency functions, a series of 4πβ-γ efficiency extrapolation measurements of a 134Cs source were…”
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Homogeneity of wheat flour in 5 ml containers for certified reference materials by Furukawa, R., Unno, Y., Miura, T., Yunoki, A., Hachinohe, M., Hamamatsu, S.

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Proficiency testing with uncertainty evaluation for measuring activities per unit mass of 134 Cs and 137 Cs in brown rice in Japan by Furukawa, R, Unno, Y, Miura, T, Yunoki, A, Hachinohe, M, Hamamatsu, S, Itadzu, H, Mizui, M

“…In Japan, we conducted proficiency testing of activity measurement by using high-purity germanium detectors for Cs and Cs in brown rice grains. Among 176…”
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Proficiency testing with uncertainty evaluation for measuring activities per unit mass of 134Cs and 137Cs in brown rice in Japan by Furukawa, R., Unno, Y., Miura, T., Yunoki, A., Hachinohe, M., Hamamatsu, S., Itadzu, H., Mizui, M.

“…In Japan, we conducted proficiency testing of activity measurement by using high-purity germanium detectors for 134Cs and 137Cs in brown rice grains. Among 176…”
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Monte Carlo simulation of a beta particle detector for food samples by Sato, Y., Takahashi, H., Yamada, T., Unno, Y., Yunoki, A.

“…The accident at the Fukushima Daiichi Nuclear Power Plant in March 2011 released radionuclides into the environment. There is concern that 90Sr will be…”
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Results of an international comparison of activity measurements of 68Ge by Cessna, J.T., Fitzgerald, R., Zimmerman, B.E., Laureano-Pérez, L., Bergeron, D.E., van Wyngaardt, F., Smith, M., Jackson, T., Howe, B., da Silva, C.J., Iwahara, A., da Cruz, P.A.L., Zhang, M., Liu, H., Liang, J., Fréchou, C., Bobin, C., Cassette, P., Kossert, K., Nähle, O., Marganiec-Gałązka, J., Joseph, L., Ravindra, A., Kulkarni, D.N., Yunoki, A., Sato, Y., Lee, K.B., Lee, J.M., Agung, Dziel, T., Listkowska, A., Tymiński, Z., Sahagia, M., Antohe, A., Ioan, M.-R., Luca, A., Krivosek, M., Ometakova, J., Javornik, A., Zalesakova, M., García-Toraño Martinez, E., Roteta, M., Mejuto, M., Nedjadi, Y., Juget, F., Yuan, M.-C., Yeh, C.Y., Yeltepe, E., Dirican, A., Keightley, J., Pearce, A.

“…An international key comparison, identifier CCRI(II)-K2.Ge-68, has been performed. The National Institute of Standards and Technology (NIST) served as the…”
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Absorption and backscatter of internal conversion electrons in the measurements of surface contamination of 137Cs by Yunoki, A., Kawada, Y., Yamada, T., Unno, Y., Sato, Y., Hino, Y.

“…We measured 4π and 2π counting efficiencies for internal conversion electrons (ICEs), gross β-particles and also β-rays alone with various source conditions…”
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A simple and versatile data acquisition system for software coincidence and pulse-height discrimination in 4πβ–γ coincidence experiments by Kawada, Y., Yamada, T., Unno, Y., Yunoki, A., Sato, Y., Hino, Y.

“…A simple but versatile data acquisition system for software coincidence experiments is described, in which any time stamping and live time controller are not…”
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Efficiency fitting for TDCR measurement data using polynomial approximation and the Newton–Raphson method by Sato, Y., Yamada, T., Matsumoto, M., Wakitani, Y., Hasegawa, T., Yoshimura, T., Murayama, H., Oda, K., Sato, T., Unno, Y., Yunoki, A.

“…A tritium radioactivity source was measured by triple-to-double coincidence ratio (TDCR) equipment of the National Metrology Institute of Japan (NMIJ), and…”
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Monte Carlo simulation of the standardization of 22Na using scintillation detector arrays by Sato, Y., Murayama, H., Yamada, T., Hasegawa, T., Oda, K., Unno, Y., Yunoki, A.

“…In order to calibrate PET devices by a sealed point source, we contrived an absolute activity measurement method for the sealed point source using…”
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Observation of β-ray spectra after penetrating absorbing materials by Kawada, Y., Yamada, T., Itoh, J., Sato, Y., Yunoki, A., Hino, Y.

“…β-Ray spectra after penetrating absorbing materials of various thicknesses were observed by the use of a scintillation-type β-ray spectrometer equipped with a…”
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Activity measurement of 68 Ge– 68 Ga by use of 4π(β + +γ) integral counting method by Yamada, T., Ishizu, H., Kawada, Y., Yunoki, A., Yano, S.

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Activity measurement of 68Ge–68Ga by use of 4π(β++γ) integral counting method by Yamada, T., Ishizu, H., Kawada, Y., Yunoki, A., Yano, S.

“…A 4π(β++γ) integral counting method using 4πβ–4πγ detector configuration composed of a large well type NaI(Tl) scintillation detector and stacked plastic…”
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An allene-doped liquid argon ionization chamber for Ar and Ca ions at around 100 MeV/n by Yunoki, A, Doke, T, Fukuda, N, Kase, M, Kato, T, Kikuchi, J, Masuda, K, Niimura, M, Okada, H, Ozaki, K, Piao, Y, Shibamura, E, Tanaka, M, Tanihata, I, Terasawa, K

“…An allene-doped liquid argon ionization chamber with 48mm×48mm×40mm sensitive volume has been constructed for precise energy measurement of heavy ions at…”
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Simulation technique for extrapolation curves in 4 pi beta - gamma coincidence counting method using EGS5 code by Unnoa, Y, Sanamib, T, Sasakib, S, Hagiwarab, M, Yunokia, A

“…A simulation technique was developed for the extrapolation technique in 4 pi beta - gamma coincidence counting method. Simultaneous emissions of beta and gamma…”
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Activity measurement of (68)Ge-(68)Ga by use of 4π(β(+)+γ) integral counting method by Yamada, T, Ishizu, H, Kawada, Y, Yunoki, A, Yano, S

“…A 4π(β(+)+γ) integral counting method using 4πβ-4πγ detector configuration composed of a large well type NaI(Tl) scintillation detector and stacked plastic…”
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