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Measurement of Neutron-Production Cross Sections for 290 MeV/u Carbon Ion Incidence
D. Moriguchi,Y. Nakamura,T. Kajimoto,Y. Koba,M. Ueyama,M. Yoshioka,N. Shigyo,Y. Uozumi,D. Satoh,T. Sanami,M. Takada,N. Matsufuji 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
Neutron-production double-differential cross sections for 290 MeV/u carbon-ion incidence on carbon target were measured with NE213 liquid organic scintillators by time-of-flight technique. NE213 liquid organic scintillators 12.7 cm in diameter and 12.7 cm thick were placed in the directions of 15˚, 30˚, 45˚, 60˚, 75˚, and 90˚. The typical flight path length was 4.0 m. In order to reduce neutrons from the beam dump, an iron and a concrete shield was placed between the detectors and the beam dump. For measurement of background, a shadow bar was set between the target and each detector. Neutron detection efficiencies were obtained by calculations with a Monte Carlo simulation code SCINFUL-QMD. The cross sections were obtained for neutron energy above 2.8 MeV. The experimental results were compared with the calculation data of the PHITS code.
Neutron-Production Double-Differential Cross Sections from Heavy-Ion Interactions
D. Satoh,D. Moriguchi,T. Kajimoto,Y. Koba,Y. Nakamura,N. Shigyo,M. Ueyama,Y. Uozumi,M. Yoshioka,N. Matsufuji,M. Takada,T. Sanami 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The existing data of neutron-production double-differential cross sections on C, Cu, and Pb targets bombarded with heavy-ions from He to Xe at 230 - 600 MeV/nucleon were revised by using a new set on neutron-detection efficiency values of an NE213-type liquid organic scintillator calculated with SCINFUL-QMD. The revised data were compared with the experimental data obtained by our new measurements, and the predictions of the Monte-Carlo particle transport codes, PHITS, FLUKA, MCNPX, and Geant4. While the revised and new experimental data showed good agreement, the Monte-Carlo codes failed to reproduce the high-energy peaks in the forward angular region.
SAWADA-SATOH, S.,AKIYAMA, K.,NIINUMA, K.,NAGAI, H.,KINO, M.,D'AMMANDO, F.,KOYAMA, S.,HADA, K.,ORIENTI, M.,HONMA, M.,SHIBATA, K.M. The Korean Astronomical Society 2015 天文學論叢 Vol.30 No.2
We present a kinematic study of the parsec-scale radio jet in OJ 287, one of the most studied BL Lac objects, during ${\gamma}$-ray flares, to explore the relation between parsec-scale radio jet activity and ${\gamma}$-ray emission. The 22-GHz light curve of OJ 287 show three obvious flare events around 2011 May, 2011 October, and 2012 March. The second radio flare occurred during the ${\gamma}$-ray flaring period, and the third radio flare seemed to precede the ${\gamma}$-ray flare by one month. One jet component moved outward with respect to the core component with an apparent superluminal speed (~ 11c) from 2010 November to 2011 November. Then it changed direction, moving apparently inward in 2011 November, when the ${\gamma}$-ray flare occurred. The observed apparent inward motion of the jet at 22 GHz could be caused by a new jet component, unresolved at 22 GHz, in the innermost region.
T. Sanami,M. Hagiwara,H. Iwase,M. Takada,D. Satoh,Y. Iwamoto,S. Kunieda,H. Yashima,A. Tamii,M. Baba 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The experimental program to measure double differential cross section (DDX) data for fragment production is launched to establish reaction models and parameters for proton induced reaction on light-medium nuclei for the energy range from threshold to a few hundred MeV. In this program, a Bragg Curve Counter (BCC) that is improved to cover entire energy range of fragment is employed as a detector. DDXs of lithium, beryllium, boron and carbon emission at 30, 60, 90, and 135 degree were measured for 40, 50, 70, and 80 MeV proton on carbon, nitrogen, oxygen and aluminium Theoretical calculation results using three different intra-nuclear cascade models were compared with experimental data. By choosing appropriate model, the calculation generally reproduces the DDXs except for fragments having relatively high energy and small emission angle, and fragments from two body reaction.
Association of a polymorphism of BTN2A1 with myocardial infarction in East Asian populations
Yamada, Y.,Nishida, T.,Ichihara, S.,Sawabe, M.,Fuku, N.,Nishigaki, Y.,Aoyagi, Y.,Tanaka, M.,Fujiwara, Y.,Yoshida, H.,Shinkai, S.,Satoh, K.,Kato, K.,Fujimaki, T.,Yokoi, K.,Oguri, M.,Yoshida, T.,Watanab Elsevier Scientific Publ. Co 2011 Atherosclerosis Vol.215 No.1
Objective: We have performed a genome-wide association study (GWAS) to identify genetic variants that confer susceptibility to myocardial infarction (MI) in Japanese and Korean populations. Methods: A total of 17,447 Japanese or Korean individuals from four independent subject panels was examined. Japanese subject panels A, B, and C comprised 134 individuals with MI and 137 controls, 1431 individuals with MI and 3161 controls, and 643 individuals with MI and 1347 controls, respectively, whereas the Korean population comprised 1880 individuals with MI and 8714 controls. A GWAS for MI was performed in Japanese subject panel A with the use of the Affymetrix GeneChip Human Mapping 500K Array Set. Results: Seventy single nucleotide polymorphisms (SNPs) significantly (P<1.0x10<SUP>-7</SUP>) associated with MI by the GWAS were examined further in Japanese subject panel B, revealing two SNPs (rs6929846 of BTN2A1, rs2569512 of ILF3) to be significantly (P<0.0007) associated with MI. The rs6929846 SNP of BTN2A1, but not rs2569512 of ILF3, was also significantly associated with MI in Japanese subject panel C. However, the association of neither rs6929846 nor rs2569512 with MI was replicated in the Korean population. Conclusion: BTN2A1 may be a susceptibility gene for MI in Japanese individuals.
Satoh, T.,Nishikawa, N.,Kawato, D.,Suemasa, D.,Jung, S.,Kim, Y.,Ree, M.,Kakuchi, T. Royal Society of Chemistry 2014 Polymer chemistry Vol.5 No.2
Well-defined hydroxyl end-functionalized poly(n-hexyl isocyanate), PHIC-(OH)(2) and PHIC-(OH)(3), as rod-type macroinitiators were synthesized by the Cu-catalyzed azide-alkyne cycloaddition reactions of azido end-functionalized PHIC with ethynyl alcohol derivatives. The PHIC-(OH)(2) and PHIC-(OH) 3 were suitable macroinitiators for the ring-opening polymerization of L-LA and epsilon-CL leading to the synthesis of novel rod-coil type miktoarm star copolymers, PHIC-b-PLLA(2), PHIC-b-PLLA(3), PHIC-b-PCL2, and PHIC-b-PCL3, with controlled molecular weights, narrow polydispersities, and controlled arm numbers. Additionally, the thermal and solution properties of the obtained miktoarm star copolymers along with the corresponding block copolymers, PHIC-b-PLLA and PHIC-b-PCL, were characterized by TGA, DSC, and DLS analyses.
Junction, Circuit and System Developments for a High-$T_c$ Superconductor Sampler
Hidaka, M.,Satoh, T.,Tahara, S. The Korean Superconductivity Society 2000 Progress in superconductivity Vol.1 No.2
A Josephson sampler circuit using high-Tc superconductor (HTS) ramp-edge junctions has been designed, fabricated, and experimentally tested. It consists of five ramp-edge junctions with a stacked groundplane and is based on single-flux-quantum (SFQ) operations. The sampler was used to measure current waveforms at picosecond and microampere resolutions. We are developing a system based on the sampler for measuring the current waveform in a room-temperature sample. And measuring current flowing through wiring in a semiconductor large-scale integrated circuit is a promising application for the HTS sampler system.