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studied by photoelectron spectroscopyKobata, Masaaki; Fujimori, Shinichi; Takeda, Yukiharu; Okane, Tetsuo; Saito, Yuji; Kobayashi, Keisuke*; Yamagami, Hiroshi; Nakamura, Ai*; Hedo, Masato*; Nakama, Takao*; et al.
Journal of the Physical Society of Japan, 85(9), p.094703_1 - 094703_6, 2016/09
Times Cited Count：13 Percentile：64.24(Physics, Multidisciplinary)Ninomiya, Kazuhiko*; Kubo, Kenya*; Nagatomo, Takashi*; Higemoto, Wataru; Ito, Takashi; Kawamura, Naritoshi*; Strasser, P.*; Shimomura, Koichiro*; Miyake, Yasuhiro*; Suzuki, Takao*; et al.
Analytical Chemistry, 87(9), p.4597 - 4600, 2015/05
Times Cited Count：28 Percentile：72.08(Chemistry, Analytical)Saruta, Koichi; Kobayashi, Takao*
EUR-26577-EN, p.490 - 496, 2014/07
Shimada, Yukihiro; Nishimura, Akihiko; Yoshikawa, Masanari*; Kobayashi, Takao*
Journal of Laser Micro/Nanoengineering, 5(1), p.99 - 102, 2010/02
Times Cited Count：8 Percentile：36.51(Nanoscience & Nanotechnology)Ultrafast laser processing was applied to fabricate fiber Bragg gratings with specific wavelength characteristics. The high-temperature properties were examined. Reflection was not changed greatly when it was exposed to temperature of up to 600 
C for 1 hour. A time-domain detector of FBG was produced for vibration measurement. FBG of three wavelength was processed in one optical fiber, and the possibility of the multipoint measurement was shown. It was proposed that the heat-resistant FBG sensors combined with wavelength tunable laser will become powerful tool in surveillance for coolant piping system in nuclear power plants.
Saruta, Koichi; Tsukimori, Kazuyuki; Shimada, Yukihiro; Nishimura, Akihiko; Kobayashi, Takao*
Nihon Hozen Gakkai Dai-6-Kai Gakujutsu Koenkai Yoshishu, p.219 - 222, 2009/08
A thermal-resistant fiber Bragg grating (FBG) fabricated by femtosecond laser processing was examined to evaluate the performance as a strain sensor, compared with a conventional FBG sensor. Each FBG was affixed on a stainless-steel beam along with a strain gauge to measure the Bragg wavelength shift as a function of strain. We used the intensity of the reflection spectra from the FBGs as a weighting factor to determine the Bragg wavelengths. Although the strain sensitivity for the thermal-resistant FBG was found to be 0.34 pm/
, a measurement accuracy of 
3 was able to be achieved by employing the Bragg wavelength determination algorithm, which was comparable to a measurement accuracy of 2 for the conventional FBG sensor.
Nakanii, Nobuhiko*; Kondo, Kiminori; Yabuuchi, Toshinori*; Tsuji, Kazuki*; Tanaka, Kazuo*; Suzuki, Shinsuke*; Asaka, Takao*; Yanagida, Kenichi*; Hanaki, Hirofumi*; Kobayashi, Takashi*; et al.
Review of Scientific Instruments, 79(6), p.166102_1 - 066102_3, 2008/06
An imaging plate has been used as a useful detector of energetic electrons in laser electron acceleration and laser fusion studies. The absolute sensitivity of an imaging plate was calibrated at 1 GeV electron energy using the injector Linac of SPring-8. The sensitivity curve obtained up to 100 MeV in a previous study was extended successfully to GeV range.
Umeda, Koji; Oi, Takao; Osawa, Hideaki; Oyama, Takuya; Oda, Chie; Kamei, Gento; Kuji, Masayoshi*; Kurosawa, Hideki; Kobayashi, Yasushi; Sasaki, Yasuo; et al.
JAEA-Review 2007-050, 82 Pages, 2007/12
JAEA-Review-2007-050.pdf:28.56MB
This report shows the annual report which shows the summarized results and topic outline of each project on geological disposal technology in the fiscal year of 2006.
Kobayashi, Takao
Denki Hyoron, 92(11), p.16 - 20, 2007/11
Uranium spot price is steeply up and down recently. However, since spot price had not always reflected the true market situation properly, we must carefully analyze the essential key factors, such as nuclear generation capacity trends, uranium resources availability, trends of exploration and development activities and the situation of secondary uranium sources, to outlook the future uranium resources' supply and demand. Even uranium resources are exist enough to sustain world nuclear generation for more than one century, as the generation capacity are projected to be growing steadily and existing important uranium mines will be exhausted one after another after 2020, it is very necessary to discover new deposits continuously and to develop new mines timely with long term prospects and strategy.
Kobayashi, Takao
Enerugi Rebyu, 27(9), p.7 - 10, 2007/09
With recent steep rise of uranium price, the worldwide uranium exploration boom has arrived again since last boom of late 1970's. Last exploration boom had shrunk shortly because the growth rate of nuclear power generation was much lower then estimated, however this time, the situation of the uranium supply and demand is quite different from last time, and uranium demand seems to keep growing long time. The noted feature of this exploration boom is that the junior companies of Canada and Australia are leading the boom. Their strategy is to re-evaluate the projects in which once deposits were discovered and evaluated in 1970's and 1980's. However, if we consider long future more than 20 years, it is more necessary to discover new uranium resources continuously, which is not so easy now without enough exploration specialists. It is very important to have long-time exploration strategy to grow human resources and to make timely discoveries and developments.
study of ultrafast photochemical reaction dynamics of phenol blueKobayashi, Takao*; Shiga, Motoyuki; Murakami, Akinori*; Nakamura, Shinichiro*
Journal of the American Chemical Society, 129(20), p.6405 - 6424, 2007/05
Times Cited Count：11 Percentile：41.72(Chemistry, Multidisciplinary)Phenol Blue (PB) is a primary skeletal structure part of indoaniline dyes. It has been recently observed by pump-probe transient absorption measurements that PB show ultrafast ground state recovery within a few hundred femtoseconds after photoexcitation. In this work, the ultrafast photochemical reaction mechanism of PB has been investigated using direct 
non-adiabatic molecular dynamics with the trajectory surface hopping method.
Kobayashi, Takao
Genshiryoku eye, 52(9), p.58 - 64, 2006/09
no abstracts in English
Ozu, Akira; Esaka, Fumitaka; Kawakita, Hiroshi*; Okamoto, Ryuta*; Imaki, Masaharu*; Kobayashi, Takao*
Reviewed and Revised Papers Presented at the 23rd International Laser Radar Conference (ILRC-23), p.107 - 108, 2006/07
We have demonstrated that asbestos particles in air can be visualized with laser-induced fluorescence emitted from asbestos. A ultra-violet (266 nm) laser pulse is used to excite asbestos particles suspended in a closed vessel. The fluorescence emitted from the asbestos in the region where the laser beam passes through is detected with a low-pass optical filter and an image intensified CCD camera with ultra-fast gate shutter. Many asbestos particles in the region are separately visualized on an image. It is possible to derive from the image the number and size of asbestos particles through image data processing. The method described in this study is expected to be useful in real-time monitoring of the concentration of asbestos particle.
; ; Sasao, Eiji; Tsuruta, Tadahiko; ; ; Kobayashi, Takao
JNC TN7410 2001-007, 330 Pages, 2001/03
JNC-TN7410-2001-007.pdf:30.03MB
None
ray from fuel of High Temperature Engineering Test Reactor; Method of measurement and resultsFujimoto, Nozomu; Nojiri, Naoki; Takada, Eiji*; Yamashita, Kiyonobu; Kikuchi, Takayuki; Nakagawa, Shigeaki; Kojima, Takao; Umeta, Masayuki; Hoshino, Osamu; Kaneda, Makoto*; et al.
JAERI-Tech 2001-002, 64 Pages, 2001/02
JAERI-Tech-2001-002.pdf:3.64MB
no abstracts in English
Yokoya, Akinari; Sekiguchi, Tetsuhiro; Saito, Yuji; Okane, Tetsuo*; Nakatani, Takeshi; Shimada, Taihei; Kobayashi, Hideki*; Takao, Masaru*; Teraoka, Yuden; Hayashi, Yukio; et al.
Journal of Synchrotron Radiation, 5, p.10 - 16, 1998/00
Times Cited Count：87 Percentile：96.77(Instruments & Instrumentation)no abstracts in English
Kobayashi, Takao
PNC TN1510 97-001, 56 Pages, 1997/05
no abstracts in English
Tanaka, Atsushi; Shimizu, Takashi*; Kikuchi, Masahiro; Kobayashi, Yasuhiko; Yamashita, Takao*; Watanabe, Hiroshi
JAERI-Conf 97-003, p.323 - 326, 1997/03
no abstracts in English
Kobayashi, Hideki*; *; Sasaki, Shigemi; Shimada, Taihei; Takao, Masaru*; *;
JAERI-Tech 96-014, 14 Pages, 1996/03
no abstracts in English
Kobayashi, Hideki*; Sasaki, Shigemi; Shimada, Taihei; Takao, Masaru*; Yokoya, Akinari;
JAERI-Tech 96-013, 32 Pages, 1996/03
no abstracts in English
Sasaki, Shigemi; Kobayashi, Hideki*; Takao, Masaru*; ; *
Review of Scientific Instruments, 66(2), p.1953 - 1955, 1995/02
Times Cited Count：12 Percentile：69.04(Instruments & Instrumentation)no abstracts in English
