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Matsumura, Taichi; Okumura, Keisuke; Sakamoto, Masahiro; Terashima, Kenichi; Riyana, E. S.; Kondo, Kazuhiro*
Nuclear Engineering and Design, 432, p.113791_1 - 113791_9, 2025/02
Riyana, E. S.; Okumura, Keisuke; Sakamoto, Masahiro; Matsumura, Taichi; Terashima, Kenichi; Kanno, Ikuo
Journal of Nuclear Science and Technology, 61(2), p.269 - 276, 2024/02
Times Cited Count：0 Percentile：0.00(Nuclear Science & Technology)Nakagawa, Taichi; Suzuki, Reika*; Matsueda, Makoto; Terashima, Motoki; Hinze, W. L.*; Takagai, Yoshitaka*
Solvent Extraction Research and Development, Japan, 31(2), p.49 - 56, 2024/00
-rays of fuel debrisMatsumura, Taichi; Okumura, Keisuke; Fujita, Manabu*; Sakamoto, Masahiro; Terashima, Kenichi; Riyana, E. S.
Radiation Physics and Chemistry, 199, p.110298_1 - 110298_8, 2022/10
Times Cited Count：1 Percentile：18.18(Chemistry, Physical)Riyana, E. S.; Okumura, Keisuke; Sakamoto, Masahiro; Matsumura, Taichi; Terashima, Kenichi
Journal of Nuclear Science and Technology, 59(4), p.424 - 430, 2022/04
Times Cited Count：1 Percentile：11.62(Nuclear Science & Technology)Riyana, E. S.; Okumura, Keisuke; Terashima, Kenichi; Matsumura, Taichi; Sakamoto, Masahiro
Mechanical Engineering Journal (Internet), 7(3), p.19-00543_1 - 19-00543_8, 2020/06
electron in Ce
La
Ru
Si; The de Haas-van Alphen effect measurementMatsumoto, Yuji; Kimura, Noriaki*; Komatsubara, Takemi*; Aoki, Haruyoshi*; Kurita, Nubuyuki*; Terashima, Taichi*; Uji, Shinya*
Journal of Physics; Conference Series, 391, p.012042_1 - 012042_4, 2012/12
Times Cited Count：1 Percentile：42.89(Physics, Multidisciplinary)CeRuSi is a paramagnetic heavy fermion compound with the electronic specific heat coefficient of 350 mJ/mol K
. When a magnetic field is applied along the [001] direction of its tetragonal ThCrSi structure, it exhibits metamagnetic transition at 7.7 T. On the other hand, when a magnetic field is applied in the (001) plane, metamagnetic transition does not occur. This magnetic anisotropy is maintained to lower Ce concentration samples. By replacing Ce with La, CeRuSi changes to antiferromagnet at 
0.91 and finally to normal paramagnet of LaRuSi. In very low Ce concentration samples, the impurity Kondo effect is observed. The Kondo temperature of the 
= 0.02 sample is about 1 K. We have successfully observed all the dHvA oscillations in the dilute Ce concentration samples with fields in the (001) plane. Moreover, we have observed the variation of the dHvA oscillations with temperature crossing the Kondo temperature.
Kanno, Ikuo; Okumura, Keisuke; Matsumura, Taichi; Riyana, E. S.; Terashima, Kenichi; Sakamoto, Masahiro
no journal, ,
We have developed a method for estimating the Cs-137 contamination distribution behind a constant thickness shield by a gamma-ray pinhole camera. This method is useful for obtaining the contamination distribution at the bottom of the shield plug in TEPCO Fukushima Daiichi Power Plant Unit 2.
Riyana, E. S.; Sakamoto, Masahiro; Matsumura, Taichi; Terashima, Kenichi; Okumura, Keisuke
no journal, ,
Nakagawa, Taichi; Suzuki, Reika*; Matsueda, Makoto; Terashima, Motoki; Iijima, Kazuki; Takagai, Yoshitaka*
no journal, ,
no abstracts in English
Riyana, E. S.; Okumura, Keisuke; Sakamoto, Masahiro; Matsumura, Taichi; Terashima, Kenichi
no journal, ,
Suzuki, Reika*; Nakagawa, Taichi; Matsueda, Makoto; Terashima, Motoki; Takase, Tsugiko*; Takagai, Yoshitaka*
no journal, ,
no abstracts in English
Nakagawa, Taichi; Suzuki, Reika*; Matsueda, Makoto; Terashima, Motoki; Horita, Takuma; Oka, Toshitaka; Kitatsuji, Yoshihiro; Takagai, Yoshitaka*
no journal, ,
no abstracts in English
Suzuki, Reika*; Nakagawa, Taichi; Matsueda, Makoto; Terashima, Motoki; Takase, Tsugiko*; Takagai, Yoshitaka*
no journal, ,
no abstracts in English
Nakagawa, Taichi; Suzuki, Reika*; Matsueda, Makoto; Takase, Tsugiko*; Terashima, Motoki; Takagai, Yoshitaka*
no journal, ,
no abstracts in English
Matsumura, Taichi; Fujita, Manabu*; Terashima, Kenichi; Sakamoto, Masahiro; Okumura, Keisuke
no journal, ,
no abstracts in English
Xe, 
Kr) emitted by fuel debris for criticality estimationRiyana, E. S.; Sakamoto, Masahiro; Matsumura, Taichi; Terashima, Kenichi; Okumura, Keisuke; Kanno, Ikuo
no journal, ,
LaRuSi system, 3Matsumoto, Yuji; Kimura, Noriaki*; Komatsubara, Takemi*; Aoki, Haruyoshi*; Kurita, Nubuyuki*; Terashima, Taichi*; Uji, Shinya*
no journal, ,
We have performed the de Haas - van Alphen (dHvA) effect measurements in CeLaRuSi with magnetic fields in the (001) plane. All the oscillations corresponding to those in LaRuSi can be observed in low Ce concentration samples and the evolution of the Fermi surface properties with x is found to depend strongly on the Fermi surface sheet. We will argue that the evolution can be attributed to anisotropic hybridization of the f electron with conduction electrons and resultant delocalization of the f electron.
Terashima, Kenichi; Kaburagi, Masaaki; Sakamoto, Masahiro; Matsumura, Taichi; Fujita, Manabu*; Okumura, Keisuke
no journal, ,
Bubble detector (BD) is neutron integral dosimeter with advantages of insensitivity to gamma ray, no power supply, visual confirmation and controllability of irradiation time according to neutron flux. Therefore, application of detection and nondestructive measurement for fuel debris is expected at Fukushima Daiichi Nuclear Power Station. Then, basic data of babble detector obtained by neutron irradiation experiment for applicability evaluation of BD.
Sakamoto, Masahiro; Terashima, Kenichi; Matsumura, Taichi; Fujita, Manabu*; Okumura, Keisuke
no journal, ,
It is important to estimate the decay heat of the fuel debris at the Fukushima Daiichi Nuclear Power Station in examining the cooling method and evaluating the heat removal of the debris transport and storage containers for debris retrieval. However, fuel debris is not easy to estimate the decay heat because the composition of nuclides is not clear like the spent fuel whose combustion history is clear. Therefore, we developed a method to easily calculate the decay heat of debris considering parameters such as debris weight, burnup, nuclide release rate, and elapsed time etc.
