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La for a T-violation searchOkudaira, Takuya; Shimizu, Hirohiko*; Kitaguchi, Masaaki*; Hirota, Katsuya*; Haddock, C. C.*; Ito, Ikuya*; Yamamoto, Tomoki*; Endo, Shunsuke*; Ishizaki, Kohei*; Sato, Takumi*; et al.
EPJ Web of Conferences, 219, p.09001_1 - 09001_6, 2019/12
Parity violating effects enhanced by up to 10
times have been observed in several neutron induced compound nuclei. There is a theoretical prediction that time reversal (T) violating effects can also be enhanced in these nuclei implying that T-violation can be searched for by making very sensitive measurements. However, the enhancement factor has not yet been measured in all nuclei. The angular distribution of the (n,) reaction was measured with La by using a germanium detector assembly at J-PARC, and the enhancement factor was obtained. From the result, the measurement time to achieve the most sensitive T-violation search was estimated as 1.4 days, and a 40% polarized La target and a 70% polarized 
He spin filter whose thickness is 70 atm
cm are needed. Therefore high quality He spin filter is developed in JAEA. The measurement result of the (n,) reaction at J-PARC and the development status of the He spin filter will be presented.
Hirota, Koichi; Hakoda, Teruyuki; Shimada, Akihiko; Taguchi, Mitsumasa; Kimura, Atsushi; Kojima, Takuji
Proceedings of 12th International Conference on Radiation Curing in Asia (RadTech Asia 2011) (Internet), p.108 - 109, 2011/06
We have focused on using MnO
for the oxidation of intermediates produced from electron beam irradiation of VOC. Manganese dioxide can decompose ozone, produced by the irradiation of air containing VOCs, into activated oxygen, which can ultimately oxide the intermediates. Hybrid system equipped with electron accelerator and MnO has demonstrated the complete oxidation of the intermediates produced during the irradiation of xylene and toluene. The electron-beam treatment of dioxin from municipal solid waste incinerator was carried out at Takahama Clean Center in Japan. An incinerator gas of 1000 mN/h was diverted downstream of a dry electric precipitator and was irradiated with electron beams using an electron accelerator that supplied 300 kV with a maximum energy of 12 kW. The results showed electron-beam is a promising technology for destroying dioxin in exhaust gases.
Kimura, Atsushi; Taguchi, Mitsumasa; Kondo, Takafumi*; Yang, J.*; Nagaishi, Ryuji; Yoshida, Yoichi*; Hirota, Koichi
Radiation Physics and Chemistry, 79(11), p.1159 - 1164, 2010/11
Times Cited Count：3 Percentile：23.92(Chemistry, Physical)Much of this past research has focused on finding more effective reactions between charged reactive species in room temperature ionic liquid (RTILs), which have a coulombic field. Reactions in RTILs involving the charged reactive species, particularly solvated electrons, have been studied by the techniques of radiation chemistry. The reaction behavior of halophenols in RTILs were investigated by ray and pulsed electron radiolysis. The yield of CP decomposition in the RTILs was almost the same as that of solvated electrons formation. The yield of CP decomposition and phenol formation in the RTILs was low in the presence of electron scavengers such as nitrous oxide, indicating that solvated electrons primarily contributed to the decomposition of CP. The type of halogen group with the exception of fluorine had a negligible effect on the decomposition of halophenols in the RTILs. Therefore, RTILs could be applied as an reaction media for the reduction by ionizing radiation.
Hakoda, Teruyuki; Shimada, Akihiko; Kimura, Atsushi; Taguchi, Mitsumasa; Sugo, Yumi; Araki, Koshi*; Dally, E. B.*; Hirota, Koichi
Industrial & Engineering Chemistry Research, 49(12), p.5517 - 5522, 2010/05
Times Cited Count：11 Percentile：38.85(Engineering, Chemical)An electron-beam (EB) irradiation/catalytic oxidation system was developed for the purification of a volatile organic compounds (VOC) gas stream under a practical gas flow condition. This system consists of a compact-sized electron accelerator and an ozone decomposition catalyst, which is MnO
. The decomposition of toluene and/or xylene and their mineralization were examined with and without catalytic oxidation for a gas stream at a flow rate of 500 Nm
/h. A combined catalyst bed enhanced the decomposition of VOCs and the mineralization of VOC and its irradiation organic byproducts. For example, the mineralization ratio for a 5-ppmv toluene/xylene/air mixture increased from 42% by EB irradiation to 100% by the combination treatment at 9.3 kGy. Furthermore, the yield of CO relative to CO
increased from 59% to 85% by this catalytic treatment.
Sugo, Yumi; Taguchi, Mitsumasa; Sasaki, Yuji; Hirota, Koichi; Kimura, Takaumi
Radiation Physics and Chemistry, 78(12), p.1140 - 1144, 2009/12
Times Cited Count：31 Percentile：87.86(Chemistry, Physical)In the actual partitioning process of HLW, the organic complexing agent will be exposed to 
-particles emitted by -decay of the actinides. In this study, -radiolysis of TODGA in 
-dodecane was investigated by the irradiation with helium ion beam accelerated by the AVF cyclotron or the tandem accelerator in the TIARA facility at JAEA Takasaki. It was found that the radiation chemical yield for the degradation of TODGA by helium ion beam irradiation was less than that by -rays irradiation. It was also observed the radiation chemical yield gradually increased with the incident energy of helium ions. These results indicate that the radiolytic degradation of TODGA is reduced by high LET radiations such as -particles. Because the radical cations of -dodecane, which contribute to the charge transfer reaction described above, decrease by recombination in track.
Taguchi, Mitsumasa; Baldacchino, G.*; Kurashima, Satoshi; Kimura, Atsushi; Sugo, Yumi; Katsumura, Yosuke*; Hirota, Koichi
Radiation Physics and Chemistry, 78(12), p.1169 - 1174, 2009/12
Times Cited Count：4 Percentile：30.43(Chemistry, Physical)no abstracts in English
-ray irradiation of organic extractants for the separation of minor actinides by the tandem acceleratorSugo, Yumi; Akamatsu, Ken; Hase, Yoshihiro; Taguchi, Mitsumasa; Sasaki, Yuji; Hirota, Koichi; Kimura, Takaumi
JAEA-Conf 2008-012, p.127 - 129, 2009/03
no abstracts in English
Taguchi, Mitsumasa; Kimura, Atsushi; Watanabe, Ritsuko; Hirota, Koichi
Radiation Research, 171(2), p.254 - 263, 2009/02
Times Cited Count：9 Percentile：32.02(Biology)This article reports the determination of yields of OH (hydroxyl) radicals in water irradiated with He, C, Ne and Ar ions ranging from 2 to 18 MeV/u. The yields of the OH radicals depend on the atomic number and energy of the incident ion, and reaction time just after the irradiation based on the track structure theory. The yields of the OH radicals estimated by analyzing the yields of the irradiation products from phenol were at almost 0 to 3.1 per 100-eV absorbed energy on a time scale from 0.75 to 300 ns and were lower than corresponding ones under low LET radiation. The yields of the OH radicals decreased with the decreasing specific energy for each ion, with the increasing atomic number of each ion at the similar specific energy, and with the average reaction time after irradiation. In addition, Monte Carlo simulations were conducted and compared with the experimentally obtained OH radical yields.
Sugo, Yumi; Taguchi, Mitsumasa; Nagaishi, Ryuji; Sasaki, Yuji; Hirota, Koichi; Kimura, Takaumi
JAEA-Review 2008-055, JAEA Takasaki Annual Report 2007, P. 161, 2008/11
no abstracts in English
Kimura, Atsushi; Taguchi, Mitsumasa; Kondo, Takafumi*; Yang, J.*; Yoshida, Yoichi*; Hirota, Koichi
Radiation Physics and Chemistry, 77(10-12), p.1253 - 1257, 2008/10
Times Cited Count：11 Percentile：59.06(Chemistry, Physical)Taguchi, Mitsumasa; Kimura, Atsushi; Hirota, Koichi; Kurashima, Satoshi; Baldacchino, G.*; Katsumura, Yosuke*
JAEA-Review 2007-060, JAEA Takasaki Annual Report 2006, P. 158, 2008/03
no abstracts in English
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：71.15(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.
Taguchi, Mitsumasa; Kimura, Atsushi; Kondo, Takafumi*; Yang, J.*; Yoshida, Yoichi*; Hirota, Koichi
no journal, ,
no abstracts in English
Taguchi, Mitsumasa; Kimura, Atsushi; Hirota, Koichi; Kurashima, Satoshi; Baldacchino, G.*; Katsumura, Yosuke*
no journal, ,
no abstracts in English
Kimura, Atsushi; Taguchi, Mitsumasa; Otani, Yoshimi*; Hiratsuka, Hiroshi*; Kojima, Takuji; Hirota, Koichi
no journal, ,
no abstracts in English
Kimura, Atsushi; Taguchi, Mitsumasa; Hirota, Koichi
no journal, ,
no abstracts in English
Taguchi, Mitsumasa; Kimura, Atsushi; Baldacchino, G.*; Katsumura, Yosuke*; Hirota, Koichi
no journal, ,
Heavy ions give unique irradiation effects on target materials. Reactions in water under heavy ion irradiation are mainly induced by OH (hydroxyl) radicals. OH radicals yields have been investigated by the (1) product analysis and (2) pulse radiolysis methods. (1) Aqueous phenol solutions were irradiated with He, C and Ne ions. The yields of the OH radicals were estimated by analyzing the yields of the irradiation products of phenol. The yields of the OH radicals increased with the specific energy, but decreased with both the mass of each ion and elapsed time. (2) Transient absorption measurement system was developed for the direct observation of radical behaviors in water under heavy ion irradiation. A small absorbance change less than 10
was recorded. The transient absorbance of (SCN)
formed by the reaction of OH radicals with SCN in aqueous KSCN solution was observed under pulsed C ion irradiation.
Taguchi, Mitsumasa; Kimura, Atsushi; Hirota, Koichi; Kurashima, Satoshi; Baldacchino, G.*; Katsumura, Yosuke*
no journal, ,
no abstracts in English
Taguchi, Mitsumasa; Baldacchino, G.*; Kurashima, Satoshi; Kimura, Atsushi; Katsumura, Yosuke*; Hirota, Koichi
no journal, ,
no abstracts in English
Taguchi, Mitsumasa; Baldacchino, G.*; Kimura, Atsushi; Kurashima, Satoshi; Hirota, Koichi
no journal, ,
no abstracts in English
