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Takeda, Masayasu
Bunseki, 2021(11), p.611 - 615, 2021/11
no abstracts in English
Takeda, Masayasu
Hamon, 31(1), p.18 - 19, 2021/02
no abstracts in English
Takeda, Masayasu
Hamon, 30(1), p.7 - 8, 2020/02
Safety review of JRR-3 under the New Regulatory Requirements was completed on 7th November 2018. Neutron beam will come back in early 2021 after reinforcement works of the roof of the reactor building, the peripheral structures like a stack, a cooling tower, and the experimental hall. The future of neutron sciences using the research reactor strongly depends on how many impacted researches using JRR-3 are achieved after restarting JRR-3. At this stage, we can learn a lot of things from the back numbers of HAMON.
Shibayama, Mitsuhiro*; Murayama, Yoji; Takeda, Masayasu
AONSA Newsletter (Internet), 11(1), P. 20, 2019/08
no abstracts in English
Maruyama, Ryuji; Yamazaki, Dai; Akutsu, Kazuhiro*; Hanashima, Takayasu*; Miyata, Noboru*; Aoki, Hiroyuki; Takeda, Masayasu; Soyama, Kazuhiko
Nuclear Instruments and Methods in Physics Research A, 888, p.70 - 78, 2018/04
Times Cited Count：6 Percentile：46.92(Instruments & Instrumentation)The multilayer structure of Fe/Si and Fe/Ge systems fabricated by ion beam sputtering (IBS) was investigated using X-ray and polarized neutron reflectivity measurements and scanning transmission electron microscopy with energy-dispersive X-ray analysis. The obtained result revealed that the incorporation of sputtering gas particles (Ar) in the Ge layer gives rise to a marked reduction in the neutron scattering length density (SLD) and contributes to the SLD contrast between the Fe and Ge layers almost vanishing for spin-down neutrons. This leads to a possibility of fine-tuning of the SLD for the IBS, which is required to realize a high polarization efficiency of a neutron polarizing supermirror. Fe/Ge polarizing supermirror with 
fabricated showed a spin-up reflectivity of 0.70 at the critical momentum transfer. The polarization was higher than 0.985 for the 
range where the correction for the polarization inefficiencies of the beamline works properly.
Nakajima, Kenji; Kawakita, Yukinobu; Ito, Shinichi*; Abe, Jun*; Aizawa, Kazuya; Aoki, Hiroyuki; Endo, Hitoshi*; Fujita, Masaki*; Funakoshi, Kenichi*; Gong, W.*; et al.
Quantum Beam Science (Internet), 1(3), p.9_1 - 9_59, 2017/12
The neutron instruments suite, installed at the spallation neutron source of the Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex (J-PARC), is reviewed. MLF has 23 neutron beam ports and 21 instruments are in operation for user programs or are under commissioning. A unique and challenging instrumental suite in MLF has been realized via combination of a high-performance neutron source, optimized for neutron scattering, and unique instruments using cutting-edge technologies. All instruments are/will serve in world-leading investigations in a broad range of fields, from fundamental physics to industrial applications. In this review, overviews, characteristic features, and typical applications of the individual instruments are mentioned.
Takeda, Masayasu
Hoshasen To Sangyo, (142), p.34 - 37, 2017/06
no abstracts in English
Takeda, Masayasu
Hozengaku, 15(2), p.31 - 34, 2016/07
no abstracts in English
Takeda, Masayasu; Matsubayashi, Masahito
Nihon Genshiryoku Gakkai-Shi ATOMO
, 58(6), p.371 - 375, 2016/06
no abstracts in English
Amemiya, Kenta*; Sakamaki, Masako*; Mizusawa, Mari*; Takeda, Masayasu
JPS Conference Proceedings (Internet), 8, p.034004_1 - 034004_6, 2015/09
Yamada, Norifumi*; Takeda, Masayasu; Yamazaki, Dai
Hamon, 24(4), p.288 - 295, 2014/11
no abstracts in English
Takeda, Masayasu; Yamazaki, Dai; Hino, Masahiro*
Hamon, 24(3), p.200 - 205, 2014/08
no abstracts in English
-wave one-neutron halo configuration on 
MgKobayashi, Nobuyuki*; Nakamura, Takashi*; Kondo, Yosuke*; Tostevin, J. A.*; Utsuno, Yutaka; Aoi, Nori*; Baba, Hidetada*; Barthelemy, R.*; Famiano, M. A.*; Fukuda, Naoki*; et al.
Physical Review Letters, 112(24), p.242501_1 - 242501_5, 2014/06
Times Cited Count：103 Percentile：94.65(Physics, Multidisciplinary)no abstracts in English
-wave halos at the drip-line; 
NeNakamura, Takashi*; Kobayashi, Nobuyuki*; Kondo, Yosuke*; Sato, Yoshiteru*; Tostevin, J. A.*; Utsuno, Yutaka; Aoi, Nori*; Baba, Hidetada*; Fukuda, Naoki*; Gibelin, J.*; et al.
Physical Review Letters, 112(14), p.142501_1 - 142501_5, 2014/04
Times Cited Count：72 Percentile：91.61(Physics, Multidisciplinary)no abstracts in English
Si/FeSi
artificial latticesSakai, Kenichiro*; Noda, Yuta*; Takeda, Kaoru*; Takeda, Masayasu; Yoshitake, Tsuyoshi*
Physica Status Solidi (C), 10(12), p.1862 - 1865, 2013/12
Times Cited Count：1 Percentile：51.82(Nanoscience & Nanotechnology)O
Wakimoto, Shuichi; Kimura, Hiroyuki*; Sakamoto, Yuma*; Fukunaga, Mamoru*; Noda, Yukio*; Takeda, Masayasu; Kakurai, Kazuhisa
Physical Review B, 88(14), p.140403_1 - 140403_5, 2013/10
Times Cited Count：21 Percentile：63.32(Materials Science, Multidisciplinary)Shimojo, Yutaka; Ihata, Yoshiaki; Kaneko, Koji; Takeda, Masayasu
JAEA-Testing 2012-005, 63 Pages, 2013/02
JAEA-Testing-2012-005.pdf:11.94MB
Taking an advantage of high penetration capability of neutron, neutron scattering experiments can be performed under various sample environment, such as low (high) temperature, pressure, magnetic field and stress, and those complex conditions. To this aim, a number of sample environment accessories, refrigerators, furnaces, pressure cells, superconducting magnets are equipped in JRR-3 to be used for experiments. In this document, all available equipment in both JRR-3 reactor hall and guide hall are summarized. We hope this document would help neutron scattering users to perform effective, and excellent experiments.
Takeda, Masayasu
Hakumaku No Hyoka Gijutsu Handobukku, p.164 - 173, 2013/01
no abstracts in English
Takeda, Masayasu
Hakumaku No Hyoka Gijutsu Handobukku, p.51 - 53, 2013/01
no abstracts in English
Takeda, Masayasu
Elekutoronikusu Jisso Gakkai-Shi, 15(6), p.492 - 499, 2012/09
no abstracts in English
