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-edge for Ce in bauxites using transition-edge sensors; Implications for Ti-rich geological samplesLi, W.*; Yamada, Shinya*; Hashimoto, Tadashi; Okumura, Takuma*; Hayakawa, Ryota*; Nitta, Kiyofumi*; Sekizawa, Oki*; Suga, Hiroki*; Uruga, Tomoya*; Ichinohe, Yuto*; et al.
Analytica Chimica Acta, 1240, p.340755_1 - 340755_9, 2023/02
Times Cited Count：2 Percentile：31.9(Chemistry, Analytical)no abstracts in English
Meng, Q.*; Hiyama, Emiko; Hosaka, Atsushi; Oka, Makoto; Gubler, P.; Can, K. U.*; Takahashi, Toru*; Zong, H. S.*
Few-Body Systems, 62(4), p.79_1 - 79_5, 2021/12
Times Cited Count：0 Percentile：0(Physics, Multidisciplinary)Takahashi, Tomoyuki*; Fukaya, Yukiko*; Iimoto, Takeshi*; Uni, Yasuo*; Kato, Tomoko; Sun, S.*; Takeda, Seiji; Nakai, Kunihiro*; Nakabayashi, Ryo*; Uchida, Shigeo*; et al.
Hoken Butsuri (Internet), 56(4), p.288 - 305, 2021/12
We report the results of activities related to the Task Group of Parameters Used in Biospheric Dose Assessment Models for Radioactive Waste Disposal at the Japan Health Physics Society.
baryon spectrum from lattice QCD and effective theoryPavao, R.*; Gubler, P.; Fernandez-Soler, P.*; Nieves, J.*; Oka, Makoto; Takahashi, Toru*
Physics Letters B, 820, p.136473_1 - 136473_8, 2021/09
Times Cited Count：3 Percentile：46.8(Astronomy & Astrophysics)
Sr in cattle bone and tooth samples by inductively coupled plasma mass spectrometryKoarai, Kazuma; Matsueda, Makoto; Aoki, Jo; Yanagisawa, Kayo*; Terashima, Motoki; Fujiwara, Kenso; Kino, Yasushi*; Oka, Toshitaka; Takahashi, Atsushi*; Suzuki, Toshihiko*; et al.
Journal of Analytical Atomic Spectrometry, 36(8), p.1678 - 1682, 2021/08
Times Cited Count：5 Percentile：55.72(Chemistry, Analytical)Rapid analysis of Sr in bone and tooth samples of cattle were achieved by an inductively coupled plasma mass spectrometry (ICP-MS) coupled with mass shift and solid phase extraction techniques. Limit of detection (LOD) in the ICP-MS measurement of 0.1 g samples was lower than that of the radioactivity measurement. Analytical time of the ICP-MS method was reduced from 20 days to 11 hours, compared with the radiometric method. Therefore, the ICP-MS method can be rapid and useful procedure of Sr in small bone and tooth samples derived from terrestrial animals.
Takahashi, Atsushi*; Chiba, Mirei*; Tanahara, Akira*; Aida, Jun*; Shimizu, Yoshinaka*; Suzuki, Toshihiko*; Murakami, Shinobu*; Koarai, Kazuma; Ono, Takumi*; Oka, Toshitaka; et al.
Scientific Reports (Internet), 11(1), p.10355_1 - 10355_11, 2021/05
Times Cited Count：6 Percentile：41.49(Multidisciplinary Sciences)Hashimoto, Makoto; Kinase, Sakae; Munakata, Masahiro; Murayama, Takashi; Takahashi, Masa; Takada, Chie; Okamoto, Akiko; Hayakawa, Tsuyoshi; Sukegawa, Masato; Kume, Nobuhide*; et al.
JAEA-Review 2020-071, 53 Pages, 2021/03
JAEA-Review-2020-071.pdf:2.72MB
In the case of a nuclear accident or a radiological emergency, the Japan Atomic Energy Agency (JAEA), as a designated public corporation assigned in the Disaster Countermeasures Basic Act and the Armed Attack Situation Response Law, undertakes technical supports to the national government and local governments. The JAEA is requested to support to evaluate radiation doses to residents in a nuclear emergency, which is specified in the Basic Disaster Management Plan and the Nuclear Emergency Response Manual. For the dose evaluation, however, its strategy, target, method, structure and so on have not been determined either specifically or in detail. This report describes the results of investigation and consideration discussed in the "Working Group for Radiation Dose Evaluation at a Nuclear Emergency" established within the Nuclear Emergency Assistance and Training Center to discuss technical supports for radiation dose evaluation to residents in the case of a nuclear emergency, and aims at contributing to specific and detailed discussion and activities in the future for the national government and local governments, also within the JAEA.
Kitazato, Kohei*; Milliken, R. E.*; Iwata, Takahiro*; Abe, Masanao*; Otake, Makiko*; Matsuura, Shuji*; Takagi, Yasuhiko*; Nakamura, Tomoki*; Hiroi, Takahiro*; Matsuoka, Moe*; et al.
Nature Astronomy (Internet), 5(3), p.246 - 250, 2021/03
Times Cited Count：43 Percentile：96.93(Astronomy & Astrophysics)Here we report observations of Ryugu's subsurface material by the Near-Infrared Spectrometer (NIRS3) on the Hayabusa2 spacecraft. Reflectance spectra of excavated material exhibit a hydroxyl (OH) absorption feature that is slightly stronger and peak-shifted compared with that observed for the surface, indicating that space weathering and/or radiative heating have caused subtle spectral changes in the uppermost surface. However, the strength and shape of the OH feature still suggests that the subsurface material experienced heating above 300 
C, similar to the surface. In contrast, thermophysical modeling indicates that radiative heating does not increase the temperature above 200 C at the estimated excavation depth of 1 m, even if the semimajor axis is reduced to 0.344 au. This supports the hypothesis that primary thermal alteration occurred due to radiogenic and/or impact heating on Ryugu's parent body.
Meng, Q.*; Hiyama, Emiko*; Hosaka, Atsushi; Oka, Makoto; Gubler, P.; Can, K. U.*; Takahashi, Toru*; Zong, H. S.*
Physics Letters B, 814, p.136095_1 - 136095_6, 2021/03
Times Cited Count：35 Percentile：98.84(Astronomy & Astrophysics)Bahtiyar, H.*; Can, K. U.*; Erkol, G.*; Gubler, P.; Oka, Makoto; Takahashi, Toru*
Physical Review D, 102(5), p.054513_1 - 054513_18, 2020/09
Times Cited Count：30 Percentile：88.74(Astronomy & Astrophysics)Spectrum of the ground state and excited states of charmed baryons was evaluated in the lattice QCD, the first principle of hadronic interaction. We deliver the spectrum of the positive and negative parity baryons with one, two or three charmed quarks. A variational approach was employed by the use of multiple operators with different Dirac matrix configurations and the smearings.
Nagasawa, Makoto*; Qin, H.-B.*; Yamaguchi, Akiko; Takahashi, Yoshio*
Chemistry Letters, 49(8), p.909 - 911, 2020/08
Times Cited Count：3 Percentile：10.1(Chemistry, Multidisciplinary)Bahtiyar, H.*; Can, K. U.*; Erkol, G.*; Oka, Makoto; Takahashi, Toru*
JPS Conference Proceedings (Internet), 26, p.022027_1 - 022027_4, 2019/11
Transition amplitude of spin 3/2 single and double-charm baryon to spin 1/2 ground state was evaluated in the lattice QCD, the first principle.
Can, K. U.*; Bahtiyar, H.*; Erkol, G.*; Gubler, P.; Oka, Makoto; Takahashi, Toru*
JPS Conference Proceedings (Internet), 26, p.022028_1 - 022028_5, 2019/11
Spectrum of the ground state and excited states of charmed baryons was evaluated in the lattice QCD, the first principle.
Bartiyar, H.*; Can, K. U.*; Erkol, G.*; Oka, Makoto; Takahashi, Toru*
Physical Review D, 98(11), p.114505_1 - 114505_14, 2018/12
Times Cited Count：22 Percentile：73.39(Astronomy & Astrophysics)Transition amplitude of spin 3/2 double-charm baryon to spin 1/2 ground state was evaluated in the lattice QCD, the first principle.
transition in lattice QCDBahtlyar, H.*; Can, K. U.*; Erkol, G.*; Oka, Makoto; Takahashi, Toru*
Physics Letters B, 772, p.121 - 126, 2017/09
Times Cited Count：24 Percentile：87.36(Astronomy & Astrophysics)We evaluate the electromagnetic 
transition on 2+1 flavor lattices corresponding to a pion mass of 
MeV. We extract the magnetic Sachs and Pauli form factors which give the 
-
transition magnetic moment and the decay rates of baryons. We did not find a signal for the magnetic form factor of the neutral transition 
, which is suppressed by the U-spin flavor symmetry. As a byproduct, we extract the magnetic form factors and the magnetic moments of and baryons, which give an insight to the dynamics of 
, 
and 
quarks having masses at different scales.
coupling and 
decay in lattice QCDCan, K. U.*; Erkol, G.*; Oka, Makoto; Takahashi, Toru*
Physics Letters B, 768, p.309 - 316, 2017/05
Times Cited Count：8 Percentile：55.37(Astronomy & Astrophysics) baryons from lattice QCD; From strange to charm quarksGubler, P.*; Takahashi, Toru*; Oka, Makoto
Physical Review D, 94(11), p.114518_1 - 114518_16, 2016/12
Times Cited Count：9 Percentile：42.39(Astronomy & Astrophysics)Can, K. U.*; Erkol, G.*; Oka, Makoto; Takahashi, Toru*
Physical Review D, 92(11), p.114515_1 - 114515_14, 2015/12
Times Cited Count：40 Percentile：82.95(Astronomy & Astrophysics)The electromagnetic form factors of the spin 
baryons, namely 
and 
, are calculated in full QCD on 323
64 PACS-CS lattices with a pion mass of 156(9) MeV. The electric charge radii and magnetic moments from the E0 and M1 multipole form factors are extracted. Results for the electric quadrupole form factors, E2, are also given. Quark sector contributions are computed individually for each observable and then combined to obtain the baryon properties. We find that the charm quark contributions are systematically smaller than the strange-quark contributions in the case of the charge radii and magnetic moments. E2 moments of the 
and provide a statistically significant data to conclude that their electric charge distributions are deformed to an oblate shape. Properties of the spin 
and 
baryons are also computed and a thorough comparison is given. This complete study gives valuable hints about the heavy-quark dynamics in charmed hadrons.
Iguchi, Tetsuo*; Hasegawa, Makoto; Takahashi, Kuniaki; Enokido, Yuji*
Dekomisshoningu Giho, (52), p.12 - 19, 2015/09
no abstracts in English
Nakashima, Yosuke*; Takeda, Hisahito*; Ichimura, Kazuya*; Hosoi, Katsuhiro*; Oki, Kensuke*; Sakamoto, Mizuki*; Hirata, Mafumi*; Ichimura, Makoto*; Ikezoe, Ryuya*; Imai, Tsuyoshi*; et al.
Journal of Nuclear Materials, 463, p.537 - 540, 2015/08
Times Cited Count：19 Percentile：82.55(Materials Science, Multidisciplinary)