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Journal Articles

Study on performance evaluation of self-actuated shutdown system for sodium-cooled fast reactor; Flow field measurement around a curie point electromagnet

Yamasaki, Ryota; Aizawa, Kosuke; Kobayashi, Jun; Kurihara, Akikazu

Proceedings of 13th Korea-Japan Symposium on Nuclear Thermal Hydraulics and Safety (NTHAS13) (Internet), 7 Pages, 2024/11

Journal Articles

Impact of the ground-state 4${it f}$ symmetry for anisotropic ${it cf}$ hybridization in the heavy-fermion superconductor CeNi$$_{2}$$Ge$$_{2}$$

Fujiwara, Hidenori*; Nakatani, Yasuhiro*; Aratani, Hidekazu*; Kanai-Nakata, Yuina*; Yamagami, Kohei*; Hamamoto, Satoru*; Kiss, Takayuki*; Yamasaki, Atsushi*; Higashiya, Atsushi*; Imada, Shin*; et al.

Physical Review B, 108(16), p.165121_1 - 165121_10, 2023/10

 Times Cited Count:0 Percentile:0.00(Materials Science, Multidisciplinary)

Journal Articles

Advanced analysis technology for new material and product development

Sasaki, Hirokazu*; Nishikubo, Hideo*; Nishida, Shinsuke*; Yamazaki, Satoshi*; Nakasaki, Ryusuke*; Isomatsu, Takemi*; Minato, Ryuichiro*; Kinugawa, Kohei*; Imamura, Akihiro*; Otomo, Shinya*; et al.

Furukawa Denko Jiho, (138), p.2 - 10, 2019/02

no abstracts in English

Journal Articles

Evidence for momentum-dependent heavy fermionic electronic structures; Soft X-ray ARPES for the superconductor CeNi$$_{2}$$Ge$$_{2}$$ in the normal state

Nakatani, Yasuhiro*; Aratani, Hidekazu*; Fujiwara, Hidenori*; Mori, Takeo*; Tsuruta, Atsushi*; Tachibana, Shoichi*; Yamaguchi, Takashi*; Kiss, Takayuki*; Yamasaki, Atsushi*; Yasui, Akira*; et al.

Physical Review B, 97(11), p.115160_1 - 115160_7, 2018/03

AA2018-0003.pdf:1.65MB

 Times Cited Count:5 Percentile:22.43(Materials Science, Multidisciplinary)

Journal Articles

Circular dichroism in resonant angle-resolved photoemission spectra of LaNi$$_{2}$$Ge$$_{2}$$

Nakatani, Yasuhiro*; Fujiwara, Hidenori*; Aratani, Hidekazu*; Mori, Takeo*; Tachibana, Shoichi*; Yamaguchi, Takashi*; Kiss, Takayuki*; Yamasaki, Atsushi*; Yasui, Akira*; Yamagami, Hiroshi*; et al.

Journal of Electron Spectroscopy and Related Phenomena, 220, p.50 - 53, 2017/01

 Times Cited Count:2 Percentile:15.41(Spectroscopy)

We report the soft X-ray angle-resolved photoemission study for LaNi$$_{2}$$Ge$$_{2}$$ to reveal the electronic structures derived from non-4$$f$$ bands of the heavy fermion compound CeNi$$_{2}$$Ge$$_{2}$$. The photoemission spectra recorded at the La M$$_{4,5}$$ absorption edges clearly show the enhancement of the La 5$$d$$ components in the valence band spectra. The circular dichroism of photoemission spectra reveals the band-dependent dichroic response due to the orbital symmetry.

Journal Articles

Magnetic and electronic properties of (LaMnO$$_3$$)$$_5$$(SrMnO$$_3$$)$$_5$$ superlattice revealed by resonant soft X-ray scattering

Kubota, Masato; Yamada, Hiroyuki*; Nakao, Hironori*; Okamoto, Jun*; Yamasaki, Yuichi*; Sawa, Akihito*; Murakami, Yoichi*

Japanese Journal of Applied Physics, 53(5S1), p.05FH07_1 - 05FH07_5, 2014/05

 Times Cited Count:2 Percentile:8.25(Physics, Applied)

Journal Articles

Antiferromagnetic order of the Co$$^{2+}$$ high-spin state with a large orbital angular momentum in La$$_{1.5}$$Ca$$_{0.5}$$CoO$$_{4}$$

Okamoto, Jun*; Nakao, Hironori*; Yamasaki, Yuichi*; Wadachi, Hiroki*; Tanaka, Arata*; Kubota, Masato; Horigane, Kazumasa*; Murakami, Yoichi*; Yamada, Kazuyoshi*

Journal of the Physical Society of Japan, 83(4), p.044705_1 - 044705_6, 2014/04

 Times Cited Count:9 Percentile:53.62(Physics, Multidisciplinary)

Journal Articles

The H-Invitational Database (H-InvDB); A Comprehensive annotation resource for human genes and transcripts

Yamasaki, Chisato*; Murakami, Katsuhiko*; Fujii, Yasuyuki*; Sato, Yoshiharu*; Harada, Erimi*; Takeda, Junichi*; Taniya, Takayuki*; Sakate, Ryuichi*; Kikugawa, Shingo*; Shimada, Makoto*; et al.

Nucleic Acids Research, 36(Database), p.D793 - D799, 2008/01

 Times Cited Count:52 Percentile:70.56(Biochemistry & Molecular Biology)

Here we report the new features and improvements in our latest release of the H-Invitational Database, a comprehensive annotation resource for human genes and transcripts. H-InvDB, originally developed as an integrated database of the human transcriptome based on extensive annotation of large sets of fulllength cDNA (FLcDNA) clones, now provides annotation for 120 558 human mRNAs extracted from the International Nucleotide Sequence Databases (INSD), in addition to 54 978 human FLcDNAs, in the latest release H-InvDB. We mapped those human transcripts onto the human genome sequences (NCBI build 36.1) and determined 34 699 human gene clusters, which could define 34 057 protein-coding and 642 non-protein-coding loci; 858 transcribed loci overlapped with predicted pseudogenes.

Journal Articles

Evaluation of aerosol sizing characteristic of an impactor using imaging plate technique

Rahman, N. M.*; Iida, Takao*; Saito, Fumihiro; Koarashi, Jun; Yamasaki, Keizo*; Yamazawa, Hiromi*; Moriizumi, Jun*

Radiation Protection Dosimetry, 123(2), p.171 - 181, 2007/02

 Times Cited Count:12 Percentile:62.48(Environmental Sciences)

no abstracts in English

Journal Articles

Spin multiplicity and charge state of a silicon vacancy (${it T}$ $$_{V2a}$$) in 4${it H}$-SiC determined by pulsed ENDOR

Mizuochi, Norikazu*; Yamasaki, Satoshi*; Takizawa, Haruki; Morishita, Norio; Oshima, Takeshi; Ito, Hisayoshi; Umeda, Takahide*; Isoya, Junichi*

Physical Review B, 72(23), p.235208_1 - 235208_6, 2005/12

 Times Cited Count:51 Percentile:83.37(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Pulsed EPR studies of shallow donor impurities in SiC

Isoya, Junichi*; Oshima, Takeshi; Morishita, Norio; Kamiya, Tomihiro; Ito, Hisayoshi; Yamasaki, Satoshi*

Physica B; Condensed Matter, 340-342, p.903 - 907, 2003/12

 Times Cited Count:11 Percentile:50.60(Physics, Condensed Matter)

no abstracts in English

Journal Articles

EPR studies of the isolated negatively charged silicon vacancies in ${it n}$-type 4${it H}$- and 6${it H}$-SiC; Identification of ${it C}$$$_{3v}$$ symmetry and silicon sites

Mizuochi, Norikazu*; Yamasaki, Satoshi*; Takizawa, Haruki; Morishita, Norio; Oshima, Takeshi; Ito, Hisayoshi; Isoya, Junichi*

Physical Review B, 68(16), p.165206_1 - 165206_11, 2003/10

 Times Cited Count:43 Percentile:83.24(Materials Science, Multidisciplinary)

Isolated silicon vacancies with negative charge (V$$_{Si}$$$$^{-}$$) in 4H- and 6H-SiC were studied using EPR. The samples used in this study were irradiated with electron at 3 MeV at RT. After irradiation, the samples were annealed at 300 $$^{circ}$$C in Ar to eliminate C-related isolated vacancies. As the result of $$^{13}$$C hyperfine spectra, two kinds of V$$_{Si}$$$$^{-}$$(I) and V$$_{Si}$$$$^{-}$$(II) were distinguished and they are assigned to be arising from hexagonal and cubic sites of Si. In addition, both V$$_{Si}$$$$^{-}$$(I) and V$$_{Si}$$$$^{-}$$(II) signals have C$$_{3v}$$ symmetry, which means nearest-neighbor carbon atoms silightly distorted from a regular tetrahedron.

Journal Articles

Continuous-wave and pulsed EPR study of the negatively charged silicon vacancy with S=3/2 and C$$_{3nu}$$ symmetry in $$n$$-type 4H-SiC

Mizuochi, Norikazu*; Yamasaki, Satoshi*; Takizawa, Haruki; Morishita, Norio; Oshima, Takeshi; Ito, Hisayoshi; Isoya, Junichi*

Physical Review B, 66(23), p.235202_1 - 235202_12, 2002/12

 Times Cited Count:117 Percentile:95.30(Materials Science, Multidisciplinary)

EPR study was performed to understand vacancy-type defects in electron-irradiated 4H-SiC. In this study, the T$$_{V2a}$$ center which was reported to be S=1 was charactrized. As a result of untation method of EPR technique, it was revealed that the multipicity of the center is not triplet (S=1) but quartet (S=3/2). From the analysis of $$^{13}$$C hyperfine interactions of nearest-neighbors, the canter was determined to be single silicon vacancy. In addition, it was found that the center is negativly charged silicon vacancy with C$$_{3nu}$$ symmetry.

Journal Articles

Polarization transfer in the $$^{16}$$O($$p,p'$$) reaction at forward angles and structure of the spin-dipole resonances

Kawabata, Takahiro*; Ishikawa, Takatsugu*; Ito, M.*; Nakamura, M.*; Sakaguchi, Harutaka*; Takeda, H.*; Taki, T.*; Uchida, Makoto*; Yasuda, Yusuke*; Yosoi, Masaru*; et al.

Physical Review C, 65(6), p.064316_1 - 064316_12, 2002/06

 Times Cited Count:20 Percentile:69.51(Physics, Nuclear)

no abstracts in English

Journal Articles

EPR study of single silicon vacancy-related defects in 4H- and 6H-SiC

Mizuochi, Norikazu*; Isoya, Junichi*; Yamasaki, Satoshi*; Takizawa, Haruki; Morishita, Norio; Oshima, Takeshi; Ito, Hisayoshi

Materials Science Forum, 389-393, p.497 - 500, 2002/00

 Times Cited Count:3 Percentile:15.83(Materials Science, Multidisciplinary)

The spin triplet (S=1) single silicon vacancy relared defects in electron irradiated (3MeV 4$$times$$10$$^{18}$$ e/cm$$^{2}$$, room temperature) n-type 4H- and p-type 6H-SiC were studied by electron paramagnetic resonance (EPR) spectroscopy. By laser irradiation, the hyperfine couplings (HFC) with nearest-neighbor (NN) atoms of T$$_{V2a}$$ were observed. As a result of detailed analysis, T$$_{V2a}$$ was unambiguously assigned to be the single silicon vacancy.

Journal Articles

Thin ice target for $$^{16}$$O (p,p') experiment

Kawabata, Takahiro*; Akimune, Hidetoshi*; Fujimura, Hisako*; Fujita, Hirohiko*; Fujita, Yoshitaka*; Fujiwara, Mamoru; Hara, Keigo*; Hatanaka, Kichiji*; Hosono, K.*; Ishikawa, Takatsugu*; et al.

Nuclear Instruments and Methods in Physics Research A, 459(1-2), p.171 - 176, 2001/02

 Times Cited Count:18 Percentile:75.76(Instruments & Instrumentation)

no abstracts in English

Oral presentation

The Millennium scale monsoon cycles recorded in a sediment core from alpine Tibetan lake

Watanabe, Takahiro; Nara, Fumiko*; Matsunaka, Tetsuya*; Minoura, Koji*; Kakegawa, Takeshi*; Yamasaki, Shinichi*; Tsuchiya, Noriyoshi*; Nakamura, Toshio*; Junbo, W.*; Liping, Z.*

no journal, , 

Understanding of past environmental and geochemical changes is significant issues to estimate global climate variation. Therefore, these changes have been studied by continuous terrestrial sediments. The high-time resolution past environmental changes, especially monsoon fluctuations, have been reported in previous studies using geochemical signatures in stalagmites from Asian caves. However, continuous climate records in Tibetan plateau have not yet been cleared, which a key area to understand mechanism of monsoon fluctuations. In this study, mean grain size and geochemical proxies from lake sediment cores from south Tibetan plateau were used for estimation of past monsoon changes during Holocene. Spectral analysis of the mean grain size in the Tibetan lake indicated 1000-1500 years climate cycles, which might be caused by the changes in solar activities. These monsoon fluctuations based on the mean grain size were also supported by geochemical proxies in this study.

Oral presentation

Artificial superlattice Mn thin films with the large magneto-resistance studied by resonant soft X-ray scattering under magnetic field

Kubota, Masato; Sudayama, Takaaki*; Yamasaki, Yuichi*; Okamoto, Jun*; Nakao, Hironori*; Murakami, Yoichi*; Yamada, Hiroyuki*; Sawa, Akihito*

no journal, , 

no abstracts in English

Oral presentation

Accumulation of radioactive cesium by spent mushroom substrate in forest system

Onuki, Toshihiko; Sakamoto, Fuminori; Kozai, Naofumi; Tanaka, Kenji; Namekawa, Jun; Yamasaki, Shinya*

no journal, , 

We used the spent mushroom substrata (SMS) which is kinds of waste after growing edible mushrooms for the in-situ remediation experiments in Fukushima. We found that the SMS accumulates radioactive Cs not only from the contaminated soil and litter, but from through fall.

Oral presentation

Remediation of contaminated forest by spent mushroom bed

Onuki, Toshihiko; Sakamoto, Fuminori; Kozai, Naofumi; Tanaka, Kenji; Namekawa, Jun; Yamasaki, Shinya*

no journal, , 

We used the spent mushroom bed, which is kinds of waste after growing edible mushrooms, for the in-situ remediation experiments in Fukushima. The results showed that the spent bed accumulates radioactive Cs not only from the contaminated soil and litter, but from throughfall.

27 (Records 1-20 displayed on this page)