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collisions at 
= 200 and 62.4 GeVAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Armendariz, R.*; et al.
Physical Review C, 83(6), p.064903_1 - 064903_29, 2011/06
Times Cited Count：184 Percentile：99.44(Physics, Nuclear)Transverse momentum distributions and yields for 
, and 
in collisions at = 200 and 62.4 GeV at midrapidity are measured by the PHENIX experiment at the RHIC. We present the inverse slope parameter, mean transverse momentum, and yield per unit rapidity at each energy, and compare them to other measurements at different collisions. We also present the scaling properties such as 
and 
scaling and discuss the mechanism of the particle production in collisions. The measured spectra are compared to next-to-leading order perturbative QCD calculations.
and Au+Au collisions at 
= 200 GeVAdare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Aramaki, Y.*; et al.
Physical Review C, 83(4), p.044912_1 - 044912_16, 2011/04
Times Cited Count：8 Percentile：49.7(Physics, Nuclear)Measurements of electrons from the decay of open-heavy-flavor mesons have shown that the yields are suppressed in Au+Au collisions compared to expectations from binary-scaled collisions. Here we extend these studies to two particle correlations where one particle is an electron from the decay of a heavy flavor meson and the other is a charged hadron from either the decay of the heavy meson or from jet fragmentation. These measurements provide more detailed information about the interaction between heavy quarks and the quark-gluon matter. We find the away-side-jet shape and yield to be modified in Au+Au collisions compared to collisions.
Yanagisawa, Kazuaki; Inoue, Tomio*; Hayakawa, Kazushige*; Shiotari, Harutaka*; Nakamura, Yoshihide*; Matsuyama, Kazuya*; Nagasawa, Kiyoshi*
Applied Radiation and Isotopes, 67(7-8), p.1387 - 1391, 2009/06
Times Cited Count：2 Percentile：17.7(Chemistry, Inorganic & Nuclear)Economic scale of radioisotopes (RI) in Japan is studied in the field of medicine, agriculture and a part of industry. (1) RI is used during medical examination with economic scale by 1.7M (million) dollars in 1997 and 0.4M dollars in 2005. (2) Economic scale of RI utilization in agriculture is 4M dollars for R&D, 127M dollars for environmental protection and 1M dollars for chronology. A total sum is 132M dollars for 2005 and 24M dollars for 1997. RI usage in agriculture is increased 5 times due to needs at environmental technology lasted after the Kyoto protocol. (3) Indirect economic scale of RI (
Kr, 
Pm, 
Cr) usage in paper fabrication field in Japan for 2006 is 8,432M dollars.
Yanagisawa, Kazuaki; Inoue, Tomio*; Hayakawa, Kazushige*; Shiotari, Harutaka*; Nakamura, Yoshihide*; Matsuyama, Kazuya*; Nagasawa, Kiyoshi*
Proceedings of 4th International Symposium on Radiation Education (ISRE 2008), p.3_16 - 3_20, 2008/12
The economic scale of radiological technologies applied to medical reimbursement is 14 billion dollars in 2005, which is larger by a factor of 17% than that of 1997. The value corresponds to about 4 to 8% (4.4% for medicine and 0.4% for dentistry) of the national health expenditure (301 billion dollars). The economic scale of radiation application at FDGPET and the charged particle therapy is 74 million dollars and 24 million dollars in 2005. In 1997 it was only 2 million dollars for the former and zero for the latter. The radiation technologies in these fields are rapidly developing. FDGPET enhanced the survival of 50,558 patients. Charged particle therapy enhanced the survival of 927 patients at 4 specified hospitals and 5,229 patients at the Proton Medical Research Center University of Tsukuba. Radiological technology is quite beneficial for the improvement of Japanese people's quality of life (QOL).
Hirota, Kazuo*; Ishitani, Yoshihide*; Nakamura, Tomomichi*; Shiraishi, Tadashi*; Sago, Hiromi*; Yamano, Hidemasa; Kotake, Shoji
Proceedings of 9th International Conference on Flow-induced Vibrations (FIV 2008), 6 Pages, 2008/00
The present study is intended to grasp flow-induced vibration characteristics in the piping by newly taken experimental data as well as to verify a vibration analysis tool with its data. It was found that a flow velocity-dependent periodic phenomenon with maximum random vibration force appears in the downstream region of the elbow. The Strouhal number of dominant pressure fluctuations in the downstream of elbow is estimated to be around 0.45. In addition, the validity of the analytical tool was confirmed by comparing between analysis and experiment.
Matsuda, Makoto; Takeuchi, Suehiro; Tsukihashi, Yoshihiro; Hanashima, Susumu; Abe, Shinichi; Osa, Akihiko; Ishizaki, Nobuhiro; Tayama, Hidekazu; Nakanoya, Takamitsu; Kabumoto, Hiroshi; et al.
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan, p.275 - 277, 2006/00
no abstracts in English
Yanagisawa, Kazuaki; Inoue, Tomio*; Hayakawa, Kazushige*; Shiotari, Harutaka*; Nakamura, Yoshihide*; Matsuyama, Kazuya*; Nagasawa, Kiyoshi*
no journal, ,
Our economic study performed in 1997 revealed that the use of radiological technology in medicine was tended to spread. A reimbursement of medicine was about 10 billion dollars corresponding to about 4% of the national health expenditures (240 billion dollars) or to an average expenditure of 1,900 dollars a year for the Japanese. In 2005 it was about 13 billion dollars. An increasing rate was 17%. One of main cause of this increase is a significant advancement of medical devices represented by digital-X ray, multi-slice CT, PET and PET-CT.
Yanagisawa, Kazuaki; Inoue, Tomio*; Hayakawa, Kazushige*; Shiotari, Harutaka*; Nakamura, Yoshihide*; Matsuyama, Kazuya*; Nagasawa, Kiyoshi*
no journal, ,
The economic scale of radiological technology in medicine/dentistry in 2005 was about 13 billion dollars. Economic scale of medical/dental cares in 2005 was large to the magnitude of 17% than that in 1997. It is worthy of mentioning that almost radiological items used in medical/dental cares were increased except a radioisotope examination in medical care. Namely, radioisotope examination was 1.7 million dollars in 1997 but was 0.4 million dollars in 2005. No radioisotopes were used in the examination of dentist.
Yanagisawa, Kazuaki; Inoue, Tomio*; Hayakawa, Kazushige*; Shiotari, Harutaka*; Nakamura, Yoshihide*; Matsuyama, Kazuya*; Nagasawa, Kiyoshi*
no journal, ,
For Japan, application of radiation in nuclear medicine is prominently used for the diagnosis, the radiotherapy and the examination by radioisotopes (RI). They addressed to FDG-PET, charged particle therapy and BNCT at the specified hospitals. Incomes are reimbursed by a national health insurance. In 2005, reimbursed incomes at those hospitals were studied as an economic scale as a commissioned work from the Cabinet Office, Government of Japan. Results were directly compared with those from previous work done in 1997. The economic scale of the application of radiation to all medical reimbursement in our country is 14 billion dollars, which is larger by a factor of 17% than that of 1997. The value corresponds to about 4.8% of the national health expenditure (301billion dollars), consisting of 4.4% for medicine and 0.4% for dentistry.
Osa, Akihiko; Abe, Shinichi; Asozu, Takuhiro; Hanashima, Susumu; Ishii, Tetsuro; Ishizaki, Nobuhiro; Kabumoto, Hiroshi; Kutsukake, Kenichi; Matsuda, Makoto; Nakamura, Masahiko; et al.
no journal, ,
At JAEA-tandem accelerator facility, we can produce radioactive nuclei by means of proton induced uranium fission, heavy ion fusion or transfer reaction. Since TRIAC was opened for use in 2005, we have provided RNBs of fission products and 
Li. For the production of Li, we chose 
C (
Li, Li) neutron transfer reaction by Li primary beam and a 99% enriched C sintered disk target. The release time of Li ions from the C sintered target/ion source system was measured to be 3.2 s. We are developing the RNB of 
Li (T
=178 ms) but the long release time caused a significant loss of the beam intensity. A boron nitride target which has fast release of Li is developed for Li beam with intensity of 10
pps after separation by JAEA-ISOL.
Shimada, Yoshihiro*; Shibata, Yoshihide; Nakamura, Yuji*; Watanabe, Kiyomasa*; Kawakami, Sho*; Miyamoto, Seiji; Isayama, Akihiko; Matsunaga, Go; Sugihara, Masayoshi*
no journal, ,
no abstracts in English
Hatakeyama, Shoichi*; Miura, Hiromasa*; Yao, Z.*; Tsutsui, Hiroaki*; Iio, Shunji*; Shibata, Yoshihide; Ono, Noriyasu*; Watanabe, Kiyomasa*; Akiyama, Tsuyoshi*; Nakamura, Kazuo*
no journal, ,
no abstracts in English
Watanabe, Kiyomasa; Hara, Yujiro*; Shibata, Yoshihide; Shimada, Yoshihiro*; Nakamura, Yuji*; Isayama, Akihiko; Miyamoto, Seiji*
no journal, ,
no abstracts in English
Sawazaki, Hiromasa; Kisohara, Naoyuki; Nakamura, Yoshihide; Sato, Takeshi
no journal, ,
Due to the sodium leak accident or troubles such as the furnace relay device falling, the operation of "Monju" has been suspended for approx. 20 years, and the system performance test has not also been executed at the rated power. However, the decay heat removal system (DHRS) has been operated at low flow rates in the primary and secondary sodium circuits, and its operating data are obtained. The performance of system or components can be evaluated using these data. The presentation addresses the overview of the study under the DHRS operation condition, and the following presentations report some of the results.
Sato, Takeshi; Okawachi, Yasushi; Nakamura, Yoshihide; Sawazaki, Hiromasa
no journal, ,
In the Monju, before expanding accident in the unlikely event of a water leak from the steam generator tubes, capturing the hydrogen concentration changes in the secondary sodium, it is important to early detect the corresponding water leak. Its detection sensitivity, the amount of hydrogen diffused from the water side to the secondary sodium in through the heat exchanger tube during normal operation, depends on the performance of the cold trap to remove it. So, this time was carried out to confirm the purification efficiency derived by using the operating data of the actual machine of purification efficiency and about 20 years was expected in the design of the secondary sodium purification system cold trap.
Nakamura, Yoshihide; Sato, Takeshi; Sawazaki, Hiromasa; Kisohara, Naoyuki
no journal, ,
Because the impurity such as NaO in sodium causes material corrosion in SFRs, sodium needs to be controlled under high purity condition. Fuel exchanges and recovering works for troubles have been done in Monju for the past 20 years, therefore, there is the possibility that oxygen in the atmosphere entered the sodium circuits and degraded the sodium purity. The analysis of the 20 year plant data has revealed, however, that the impurity in the primary sodium has been maintained to be low enough by the skillful technique of purity management.
Morioka, Tatsuya; Sawazaki, Hiromasa; Uchida, Takenobu; Sato, Takeshi; Nakamura, Yoshihide; Shiotani, Hiroki; Kunogi, Kosuke
no journal, ,
Thermal natural convection occurred in Ar gas region between the inner and outer casing of the sodium pump in the past, which induces asymmetric circumferential temperature distribution on the casings. This thermal effect causes the contact of the pump shaft with the lower hydrostatic bearing, which places the bearing at risk for damage. This phenomenon strongly appears in long size pumps of sodium fast reactors. To prevent this risk for Monju primary sodium pump, convection prevention plates are installed between the inner and outer casing of the pump. Monju plant data indicates the plates decrease the circumferential temperature difference, and then no contact arose between the pump shaft and the bearing.
Sato, Takeshi; Sawazaki, Hiromasa; Morioka, Tatsuya; Uchida, Takenobu; Nakamura, Yoshihide; Shiotani, Hiroki; Okawachi, Yasushi
no journal, ,
In Monju, it is important to detect and respond to hydrogen concentration changes in secondary sodium at an early stage, before any water leakage from the steam generator heat transfer tube expands. For that purpose, it is necessary to understand the hydrogen concentration during normal operation. In this report, we estimated, using the purification efficiency evaluation of the cold trap reported at the fall programs of 2016, the amount of diffused hydrogen from the characteristic test data of 1995 and evaluated the hydrogen concentration in the secondary sodium during normal operation.
Shiotani, Hiroki; Sawazaki, Hiromasa; Nakamura, Yoshihide; Sato, Takeshi; Uchida, Takenobu; Arai, Masanobu
no journal, ,
We are evaluating operating data of about 20 years (Evaluation of "Monju Research Plan") through the collaboration of both older and younger engineers. In this study, we will propose the use of information technologies and/or statistics tools in future evaluation to make the data treatment in an effective and efficient manner. In addition to that, we will also present a vision for supporting and cooperating technical tradition and knowledge discovery, etc. nuclear engineers by machine learning technologies toward the commercialization of fast reactor cycle systems.
Sawazaki, Hiromasa; Nakamura, Yoshihide; Sato, Takeshi; Morioka, Tatsuya; Uchida, Takenobu; Shiotani, Hiroki; Kisohara, Naoyuki
no journal, ,
We are evaluating operating data of about 20 years (Evaluation of "Monju" Research Plan) Now, In this presentation, We extract the facilities that can be evaluated on the "Monju" research plan and report the result of selecting the evaluation items. In addition, some of the evaluations were found to be possible from another viewpoint. We added them as evaluation items, and we will add evaluation items in order and evaluate them in the future as they become obvious in the future. In addition, we are currently reviewing the results of the research and development on "Monju" including "Monju" Research Plan within the JAEA, and review the evaluation items and the plan itself as necessary.
