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Journal Articles

Search for the 6$$alpha$$ condensed state in $$^{24}$$Mg using the $$^{12}$$C+$$^{12}$$C scattering

Fujikawa, Y.*; Kawabata, T.*; Adachi, S.*; Hirose, Kentaro; Makii, Hiroyuki; Nishio, Katsuhisa; Orlandi, R.; Suzaki, Fumi; 13 of others*

Physics Letters B, 848, p.133834_1 - 133834_6, 2024/01

Journal Articles

PANDORA Project for the study of photonuclear reactions below $$A=60$$

Tamii, Atsushi*; Pellegri, L.*; S$"o$derstr$"o$m, P.-A.*; Allard, D.*; Goriely, S.*; Inakura, Tsunenori*; Khan, E.*; Kido, Eiji*; Kimura, Masaaki*; Litvinova, E.*; et al.

European Physical Journal A, 59(9), p.208_1 - 208_21, 2023/09

no abstracts in English

Journal Articles

Formation of $$alpha$$ clusters in dilute neutron-rich matter

Tanaka, Junki*; Yang, Z.*; Typel, S.*; Adachi, Satoshi*; Bai, S.*; van Beek, P.*; Beaumel, D.*; Fujikawa, Yuki*; Han, J.*; Heil, S.*; et al.

Science, 371(6526), p.260 - 264, 2021/01

 Times Cited Count:30 Percentile:99.14(Multidisciplinary Sciences)

By employing quasi-free $$alpha$$-cluster-knockout reactions, we obtained direct experimental evidence for the formation of $$alpha$$ clusters at the surface of neutron-rich tin isotopes. The observed monotonous decrease of the reaction cross sections with increasing mass number, in excellent agreement with the theoretical prediction, implies a tight interplay between $$alpha$$-cluster formation and the neutron skin.

Journal Articles

Experimental investigation of spin Hall effect in indium tin oxide thin film

Qiu, Z.*; An, Toshu*; Uchida, Kenichi*; Hou, D.*; Shiomi, Yuki*; Fujikawa, Yasunori*; Saito, Eiji

Applied Physics Letters, 103(18), p.182404_1 - 182404_3, 2013/10

 Times Cited Count:19 Percentile:61.88(Physics, Applied)

Journal Articles

Surface study of organopalladium molecules on S-terminated GaAs

Konishi, Tomoya*; Nishiwaki, Nagatoshi*; Tojo, Takashi*; Ishikawa, Takuma*; Teraoka, Teruki*; Ueta, Yukiko*; Kihara, Yoshifumi*; Moritoki, Hideji*; Tono, Tatsuo*; Musashi, Mio*; et al.

Physica Status Solidi (C), 8(2), p.405 - 407, 2011/02

 Times Cited Count:3 Percentile:74.88

Journal Articles

Time-resolved X-ray diffraction measurements of high-density InAs quantum dots on Sb/GaAs layers and the suppression of coalescence by Sb-irradiated growth interruption

Kakuda, Naoki*; Kaizu, Toshiyuki*; Takahashi, Masamitsu; Fujikawa, Seiji; Yamaguchi, Koichi*

Japanese Journal of Applied Physics, 49(9), p.095602_1 - 095602_4, 2010/09

 Times Cited Count:2 Percentile:15.04(Physics, Applied)

Journal Articles

Simulation and experiments of the laser induced breakdown of air for femtosecond to nanosecond order pulses

Koga, J. K.; Moribayashi, Kengo; Fukuda, Yuji; Bulanov, S. V.; Sagisaka, Akito; Ogura, Koichi; Daido, Hiroyuki; Yamagiwa, Mitsuru; Kimura, Toyoaki*; Fujikawa, Taketoshi*; et al.

Journal of Physics D; Applied Physics, 43(2), p.025204_1 - 025204_15, 2010/01

 Times Cited Count:14 Percentile:56.66(Physics, Applied)

JAEA Reports

Collection of URL measurement data in 2008 at the Horonobe Underground Research Laboratory Project

Sano, Michiaki; Ishii, Eiichi; Niinuma, Hiroaki; Fujikawa, Daisuke; Sanada, Hiroyuki; Hiraga, Naoto; Tsusaka, Kimikazu; Yamasaki, Masanao*

JAEA-Data/Code 2009-015, 142 Pages, 2009/11

JAEA-Data-Code-2009-015.pdf:41.84MB

In the Horonobe Underground Laboratory (URL) Project, Construction of the Ventilation Shaft, the East Shaft and the drifts has been conducted as a Phase 2 research. In the research, observation of the lithofacies and fracture, and in-situ tests, simple elastic wave exploration, Schmidt hammer test, Equotip test, point load test are conducted in each face, and measuring instruments such as extensometer, rock-bolt axial force meter, shotcrete stress meter and tunnel lining concrete stress meter are installed in particular face. In addition, for the purpose of the validation of the results of predictive analysis, conducted in Phase 1, about the amount of spring water during construction of Underground facilities, data on the changes of amount of spring water and water quality is obtained. This report summarizes the measurements data acquired at the Ventilation Shaft (GL -161m $$sim$$ -250m), the East Shaft (GL -110m $$sim$$ -140m) and the 140m drift.

JAEA Reports

Collection of URL measurement data in 2007 at the Horonobe Underground Research Laboratory Project

Yamazaki, Masanao; Funaki, Hironori; Yamaguchi, Takehiro*; Niinuma, Hiroaki; Fujikawa, Daisuke; Sanada, Hiroyuki; Hiraga, Naoto; Tsusaka, Kimikazu

JAEA-Data/Code 2008-023, 136 Pages, 2008/11

JAEA-Data-Code-2008-023.pdf:17.08MB

This report summarizes the measurements data acquired at the Ventilation Shaft, the East Shaft and the drifts in 2007 based on the Observational Construction Program. The report summarizes for the purpose of the followings: sharing the investigation and measurements data, preventing the loss of them and acquisition the basic data for carrying out the Observational Construction Program.

Journal Articles

Study of stellar reactions in explosive hydrogen burning with CRIB

Kubono, Shigeru*; Teranishi, Takashi*; Notani, Masahiro*; Yamaguchi, Hidetoshi*; Saito, Akito*; He, J. J.*; Wakabayashi, Yasuo*; Fujikawa, Hisashi*; Amadio, G.*; Baba, Hidetada*; et al.

Nuclear Physics A, 758, p.733 - 736, 2005/07

 Times Cited Count:1 Percentile:14.46(Physics, Nuclear)

With using $$^{17}F$$ RNB from CRIB, proton inelastic scattering was observed. From this experiment, some resonance parameters have been deduced for the key reaction, $$^{14}O(alpha,p)^{17}F$$ at the explosive hydrogen burning stage in stars. Proton inelastic scattering of $$^{23}Mg$$ are also reported.

Journal Articles

Achievement of reactor-outlet coolant temperature of 950$$^{circ}$$C in HTTR

Fujikawa, Seigo; Hayashi, Hideyuki; Nakazawa, Toshio; Kawasaki, Kozo; Iyoku, Tatsuo; Nakagawa, Shigeaki; Sakaba, Nariaki

Journal of Nuclear Science and Technology, 41(12), p.1245 - 1254, 2004/12

 Times Cited Count:87 Percentile:97.76(Nuclear Science & Technology)

A High Temperature Gas-cooled Reactor (HTGR) is particularly attractive due to its capability of producing high-temperature helium gas and to its inherent safety characteristics. The High Temperature Engineering Test Reactor (HTTR), which is the first HTGR in Japan, achieved its rated thermal power of 30MW and reactor-outlet coolant temperature of 950$$^{circ}$$C on 19 April 2004. During the high-temperature test operation which is the final phase of the rise-to-power tests, reactor characteristics and reactor performance were confirmed, and reactor operations were monitored to demonstrate the safety and stability of operation. The reactor-outlet coolant temperature of 950$$^{circ}$$C makes it possible to extend high-temperature gas-cooled reactor use beyond the field of electric power. Also, highly effective power generation with a high-temperature gas turbine becomes possible, as does hydrogen production from water. The achievement of 950$$^{circ}$$C will be a major contribution to the actualization of producing hydrogen from water using the high-temperature gas-cooled reactors. This report describes the results of the high-temperature test operation of the HTTR.

Journal Articles

JAERI completed performance tests of the High Temperature Engineering Test Reactor (HTTR) at 950$$^{circ}$$C

Kawasaki, Kozo; Iyoku, Tatsuo; Nakazawa, Toshio; Hayashi, Hideyuki; Fujikawa, Seigo

Nihon Genshiryoku Gakkai-Shi, 46(8), P. 510, 2004/08

no abstracts in English

Journal Articles

High Temperature Engineering Test Reactor (HTTR) of JAERI achieved the reactor outlet helium gas temperature of 950$$^{circ}$$C for the first time in the world

Kawasaki, Kozo; Iyoku, Tatsuo; Nakazawa, Toshio; Hayashi, Hideyuki; Fujikawa, Seigo

Nihon Genshiryoku Gakkai-Shi, 46(5), P. 301, 2004/05

no abstracts in English

Journal Articles

Study on storage and reprocessing concept of the High Temperature engineering Test Reactor (HTTR) fuel

Sawa, Kazuhiro; Yoshimuta, Shigeharu*; Shiozawa, Shusaku; Fujikawa, Seigo; Tanaka, Toshiyuki; *; *; *

IAEA-TECDOC-1043, p.177 - 189, 1998/09

no abstracts in English

Journal Articles

Present status of the High Temperature engineering Test Reactor (HTTR)

Tanaka, Toshiyuki; Okubo, Minoru; Fujikawa, Seigo; Mogi, Haruyoshi; Suzuki, Hiroshi

Proc. of PBNC'98, 2, p.1203 - 1210, 1998/00

no abstracts in English

Journal Articles

Present status of the High Temperature engineering Test Reactor(HTTR)

Tanaka, Toshiyuki; Shiozawa, Shusaku; Okubo, Minoru; Fujikawa, Seigo; Mogi, Haruyoshi; Suzuki, Hiroshi

Proceedings of European Nuclear Conference (ENC'98), 4, 5 Pages, 1998/00

no abstracts in English

JAEA Reports

Database for $$^{238}$$U inelastic scattering cross section evaluation

Kanda, Yukinori*; Fujikawa, Noboru*; Kawano, Toshihiko*

JAERI-M 93-205, 52 Pages, 1993/10

JAERI-M-93-205.pdf:0.89MB

no abstracts in English

Journal Articles

Wake of nuclear ship Mutsu, present status of R & D and future plan, Part II; Design of N.S.Mutsu

Yamaki, Jikei; Fujikawa, Seigo; ; Ishida, Toshihisa; Mizushima, Toshihiko; *; Sakamoto, Yukio;

Genshiryoku Kogyo, 38(4), p.13 - 28, 1992/04

no abstracts in English

Oral presentation

Simulation and experiments of the laser induced breakdown of air for femtosecond to picosecond order pulses

Koga, J. K.; Moribayashi, Kengo; Fukuda, Yuji; Bulanov, S. V.; Sagisaka, Akito; Ogura, Koichi; Daido, Hiroyuki; Yamagiwa, Mitsuru; Kimura, Toyoaki; Fujikawa, Taketoshi*; et al.

no journal, , 

Oral presentation

Application of cathodoluminescence to observe growth layer of carbonate

Murakami, Hiroaki; Kokubu, Yoko; Yokoyama, Tatsunori; Watanabe, Takahiro; Yuguchi, Takashi*; Fujikawa, Masayuki*; Nishiyama, Tadao*

no journal, , 

In order to observe micro-growth layers in carbonate, we consider availability and measurement procedure of cathodoluminescence for various carbonates. Optical-CL image and SEM-CL image provide layering structures of entire area and microscale distribution of layering structures, respectively. Thus, the approach in the order of Optical-CL measurement to SEM-CL measurement is powerful means of microscale observation of carbonate.

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