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Journal Articles

How different is the core of $$^{25}$$F from $$^{24}$$O$$_{g.s.}$$ ?

Tang, T. L.*; Uesaka, Tomohiro*; Kawase, Shoichiro; Beaumel, D.*; Dozono, Masanori*; Fujii, Toshihiko*; Fukuda, Naoki*; Fukunaga, Taku*; Galindo-Uribarri, A.*; Hwang, S. H.*; et al.

Physical Review Letters, 124(21), p.212502_1 - 212502_6, 2020/05

 Times Cited Count:18 Percentile:74.24(Physics, Multidisciplinary)

The structure of a neutron-rich $$^{25}$$F nucleus is investigated by a quasifree ($$p,2p$$) knockout reaction. The sum of spectroscopic factors of $$pi 0d_{5/2}$$ orbital is found to be 1.0 $$pm$$ 0.3. The result shows that the $$^{24}$$O core of $$^{25}$$F nucleus significantly differs from a free $$^{24}$$O nucleus, and the core consists of $$sim$$35% $$^{24}$$O$$_{rm g.s.}$$, and $$sim$$65% excited $$^{24}$$O. The result shows that the $$^{24}$$O core of $$^{25}$$F nucleus significantly differs from a free $$^{24}$$O nucleus. The result may infer that the addition of the $$0d_{5/2}$$ proton considerably changes the neutron structure in $$^{25}$$F from that in $$^{24}$$O, which could be a possible mechanism responsible for the oxygen dripline anomaly.

Journal Articles

High oxide-ion conductivity in Si-deficient La$$_{9.565}$$(Si$$_{5.826}$$[]$$_{0.174}$$)O$$_{26}$$ apatite without interstitial oxygens due to the overbonded channel oxygens

Fujii, Kotaro*; Yashima, Masatomo*; Hibino, Keisuke*; Shiraiwa, Masahiro*; Fukuda, Koichiro*; Nakayama, Susumu*; Ishizawa, Nobuo*; Hanashima, Takayasu*; Ohara, Takashi

Journal of Materials Chemistry A, 6(23), p.10835 - 10846, 2018/06

 Times Cited Count:30 Percentile:68.83(Chemistry, Physical)

Journal Articles

Simulation of discharge in insulating gas from initial partial discharge to growth of a stepped leader using the percolation model

Sasaki, Akira; Kato, Susumu*; Takahashi, Eiichi*; Kishimoto, Yasuaki*; Fujii, Takashi*; Kanazawa, Seiji*

Japanese Journal of Applied Physics, 55(2), p.026101_1 - 026101_10, 2016/02

 Times Cited Count:2 Percentile:8.87(Physics, Applied)

A percolation model of discharge, which can reproduce stochastic behaviors of initial partial discharge to the growth of a stepped leader, is presented. The model uses macroscopic cells, from which a network of electric circuits is defined, and the spatial and temporal evolutions of the electric field and current in the discharge medium are calculated. For each cell, one of two states, either insulator or conductor, which corresponds to neutral gas or ionized plasmas, respectively, is decided. The decision is made on the basis of probability for each calculation cell at each time step, taking the effects of local electric field and current, which enhance ionization and sustain the discharge channel, respectively, into account. The stochastic behavior of discharge is discussed, in conjunction with the characteristic feature of ionization, that is, the ionization occurs not only ahead of the streamer tip where the electric field is enhanced but randomly in the discharge medium.

Journal Articles

Percolation simulation of laser-guided electrical discharges

Sasaki, Akira; Kishimoto, Yasuaki*; Takahashi, Eiichi*; Kato, Susumu*; Fujii, Takashi*; Kanazawa, Seiji*

Physical Review Letters, 105(7), p.075004_1 - 075004_4, 2010/08

 Times Cited Count:12 Percentile:58.67(Physics, Multidisciplinary)

A three-dimensional simulation of laser guided-discharges based on the percolation is presented. The model includes both local growth of a streamer due to the enhanced electric field at the tip and propagation of a leader by remote ionization such that caused by runaway electrons. The stochastic behavior of the discharge through preformed plasma channel is reproduced by the calculation, which shows complex path with detouring and bifurcation. The probability of guiding is investigated with respect to the ionized, conductive fraction along the channel.

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:70.75(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

Beam generation experiments and device developments for in-terminal ECR ion source injector

Matsuda, Makoto; Takeuchi, Suehiro; Yoshida, Tadashi; Hanashima, Susumu; Fujii, Yoshio*

Dai-14-Kai Kasokuki Kagaku Kenkyu Happyokai Hokokushu, p.170 - 172, 2003/00

no abstracts in English

Journal Articles

Status report of in-terminal ECR ion source

Matsuda, Makoto; Fujii, Yoshio*; Tayama, Hidekazu; Ishizaki, Nobuhiro; Abe, Shinichi; Hanashima, Susumu; Tsukihashi, Yoshihiro; Horie, Katsuzo; Ouchi, Isao; Kanda, Susumu; et al.

JNC TN7200 2001-001, p.166 - 168, 2002/01

no abstracts in English

Journal Articles

New aspects of the b$$^{ast}$$LA phonon of CuGeO$$_{3}$$

Nishi, Masakazu*; Kakurai, Kazuhisa*; Fujii, Yasuhiko*; Katano, Susumu; Akimitsu, Jun*; M.Yethiraj*; Fernandez-Baca, J. A.*

Journal of Physics and Chemistry of Solids, 60(8-9), p.1109 - 1111, 1999/00

 Times Cited Count:5 Percentile:33.05(Chemistry, Multidisciplinary)

no abstracts in English

Journal Articles

Magnetic phase diagram of the spin-peierls and artiferromagnetic system CuGe$$_{1-x}$$Si$$_{x}$$O$$_{3}$$

Katano, Susumu; ; Akimitsu, Jun*; Nishi, Masakazu*; Kakurai, Kazuhisa*; Fujii, Yasuhiko*

Physical Review B, 57(17), p.10280 - 10283, 1998/05

 Times Cited Count:12 Percentile:55.06(Materials Science, Multidisciplinary)

no abstracts in English

Oral presentation

Discharge simulation using the percolation model

Sasaki, Akira; Torii, Tatsuo; Takahashi, Eiichi*; Kato, Susumu*; Kishimoto, Yasuaki*; Kanazawa, Seiji*; Fujii, Takashi*

no journal, , 

no abstracts in English

Oral presentation

Percolation simulation of lightning discharge and analysis of laser-guided discharges

Sasaki, Akira; Torii, Tatsuo; Kato, Susumu*; Takahashi, Eiichi*; Fujii, Takashi*; Kanazawa, Seiji*; Kishimoto, Yasuaki*

no journal, , 

no abstracts in English

Oral presentation

Pirani vacuum gauge for J-PARC 3GeV synchrotron vacuum system

Kuroiwa, Masahide*; Matsumoto, Nobuhiko*; Fujii, Susumu*; Ogiwara, Norio; Arai, Hideyuki*

no journal, , 

Oral presentation

Modeling of the temporal and spatial structure of discharge

Sasaki, Akira; Torii, Tatsuo; Takahashi, Eiichi*; Kato, Susumu*; Fujii, Takashi*; Kanazawa, Seiji*

no journal, , 

no abstracts in English

Oral presentation

Modeling discharge phenomena and simulation of stepped leaders

Sasaki, Akira; Kato, Susumu*; Takahashi, Eiichi*; Fujii, Takashi*; Kanazawa, Seiji*; Kishimoto, Yasuaki*

no journal, , 

no abstracts in English

Oral presentation

Pirani vacuum gauge for J-PARC 3GeV synchrotron vacuum system

Kuroiwa, Masahide*; Sasaki, Masanao*; Fujii, Susumu*; Matsumoto, Nobuhiko*; Ogiwara, Norio; Arai, Hideyuki*

no journal, , 

no abstracts in English

Oral presentation

Simulation of probability and structure formation of discharge with percolation model

Sasaki, Akira; Takahashi, Eiichi*; Kato, Susumu*; Kishimoto, Yasuaki*; Kanazawa, Seiji*; Fujii, Takashi*

no journal, , 

no abstracts in English

Oral presentation

Modeling of the temporal and spatial structure of discharge

Sasaki, Akira; Torii, Tatsuo; Takahashi, Eiichi*; Kato, Susumu*; Fujii, Takashi*; Kanazawa, Seiji*; Kishimoto, Yasuaki*

no journal, , 

no abstracts in English

Oral presentation

Analysis of discharge using a simulation based on time-dependent percolation model

Sasaki, Akira; Kato, Susumu*; Takahashi, Eiichi*; Fujii, Takashi*; Kanazawa, Seiji*; Kishimoto, Yasuaki*

no journal, , 

no abstracts in English

Oral presentation

Simulation of development of leader and streamer based on the percolation model

Sasaki, Akira; Takahashi, Eiichi*; Kato, Susumu*; Kishimoto, Yasuaki*; Fujii, Takashi*; Kanazawa, Seiji*

no journal, , 

The discharge simulation based on the percolation model is extended to include the dynamics of formation and extincition of the ionized region in the gas, and the temporal evolution of discharge current is calculated taking spatial capacitance and inductance into account. Calculations show prebreakdown activity appears in front of the protrution on the electrode after some delay from a high voltage is applied across the gap, which is followed by the development of the stepped leader and the establishment of a discharge path between the electrondes.

Oral presentation

Modeling discharge phenomena and simulation of stepped leaders

Sasaki, Akira; Kato, Susumu*; Takahashi, Eiichi*; Fujii, Takashi*; Kanazawa, Seiji*; Kishimoto, Yasuaki*

no journal, , 

no abstracts in English

25 (Records 1-20 displayed on this page)