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Ichihara, Akira; Yokoyama, Keiichi
no journal, ,
Recently, we proposed a method for isotope-selective rovibrational excitation of diatomic molecules by two kinds of optical pulses, for the isotope-separation of long-lived fission products produced in atomic energy power plants. In this method, rotational states of the molecules are excited isotope-selectively by using an optical frequency comb. Then, vibrational states of the molecules in high rotational states are excited by another optical pulse. In this study, we investigated how the second pulse shape affects the isotope-selective vibrational excitation using computer simulations based on the close-coupling method. The LiCl molecules were used as test molecules. The results indicated that the isotope-selective vibrational excitation is induced effectively by properly selecting spectral frequencies of the second pulse by referring to the transition frequencies in the P-branch of the selected isotope molecule.
Hirade, Tetsuya
no journal, ,
Positronium(Ps) creates a bubble in liquids because of a negative work function. The ortho-Ps annihilation probability depends on the size of the bubble. The oscillation of the ortho-Ps annihilation probability at very young positron ages was successfully observed in room temperature ionic liquids (RTIL). Moreover, the stable annihilation rates at old positron ages in RTIL are much smaller than the annihilation rates of other liquids having similar surface tensions. These phenomena probably indicate two phases in RTIL composed of the Coulomb interaction and the van der Waals interaction.
Shimojo, Kojiro; Okamura, Hiroyuki; Imura, Hisanori*; Naganawa, Hirochika
no journal, ,
The detection and removal of toxic metal ions have received considerable attention from the viewpoint of environmental protection. Therefore, it should be highly desirable to develop new analytical methods that can simultaneously detect and remove toxic metal ions. In this study, the solvent extraction of toxic metal Cd(II) cations was investigated using a novel extractant composed of diaza-18-crown-6 and two 8-quinolinol chromophores. When using ions liquid (IL) or chloroform as extracting medium, the intramolecular cooperative effect of this ligand for Cd(II) cations was observed only in the IL systems, resulting in dramatic enhancement of the extraction performance of this ligand in IL compared with that in chloroform. Furthermore, it was found that this ligand became luminous by forming the extracted complexes with Cd(II) cations.
Nakano, Masaki*; Oishi, Tomoji*; Watanabe, Masayuki; Aoyagi, Noboru
no journal, ,
In this study, we have focused on the development of the bright color filter(CF) by the solubilization of pigment. The diketo pyrrolo pyrole(DPP) derivatives are one of the most important CF pigment for LCD as a red pigment. The efficient synthesis of the latent by the microwave and the fluorescence properties of the pigments were investigated by using a variety of the substituent groups and the number of the substituents on the pigment.
Hamada, Takashi; Sawada, Shinichi; Hasegawa, Shin; Maekawa, Yasunari
no journal, ,
We herein report a new strategy to prepare well-defined graft polymers into solid state plastic films by radiation-induced and atom transfer radical polymerizations (ATRP). To prepare the films with the macro-initiator, 4-chloromethylstyrene was introduced into poly(ether ether ketone) films by radiation-induced polymerization. Then, ATRP of styrene was conducted in acetonitrile using Cu-based catalyst. By adjusting catalyst concentration, grafting degrees of polystyrene linearly increased even at 50 
C and reached to 112%. Furthermore, we confirmed the living nature of the propagating graft-polymers in the successive ATRP in solid polymer films.
Fukasawa, Hideyuki*; Hasegawa, Shin; Maekawa, Yasunari
no journal, ,
We previously reported the successful preparation of highly conducting and mechanically stable graft-type PEMs based on an aromatic hydrocarbon polymer, poly(ether ether ketone) (PEEK). Since polymer membranes are mechanically reinforced by the hybridization with inorganic particles, we synthesized graft-type hybrid-PEEK PEMs by the radiation-induced graft polymerization of ethyl p-styrenesulfonate onto the hybrid films consisting of PEEK and inorganic nanoparticles such as silica. The hybrid PEEK PEMs with 3% silica nano-particles showed higher tensile strength than the original PEEK PEMs at high temperature and high relative humidity (80C, 100%RH). This is because the filler effect of silica nano-particles and high crystallinity in the PEEK-PEMs are the origin of high tensile strength at humidified conditions.
= 102)Sato, Tetsuya; Asai, Masato; Kaneya, Yusuke; Tsukada, Kazuaki; Toyoshima, Atsushi; Takeda, Shinsaku; Mitsukai, Akina*; Nagame, Yuichiro; Ichikawa, Shinichi; Makii, Hiroyuki; et al.
no journal, ,
We successfully determined the first ionization energy (IE) of nobelium (No, = 102) using a short-lived No isotope, 
No produced in the
Cm(
C, 4n) reaction, based on the IE dependence of the ionization efficiency in a surface ionization process. The IE value of No was evaluated to be 6.6 eV. This value is in a good agreement with the value which has been estimated by an extrapolation from those of the lighter actinide elements, 6.65 eV.
Ohara, Takashi
no journal, ,
no abstracts in English
Watanabe, Saki*; Watanabe, Shigeki; Yamada, Keiichi*; Oku, Hiroyuki*; Moriguchi, Tomohisa*; Ishioka, Noriko; Shinozuka, Kazuo*
no journal, ,
no abstracts in English
Sekine, Yurina; Tojima, Yu*; Fukazawa, Tomoko*; Fukazawa, Hiroshi
no journal, ,
Neutron diffraction patterns of high and low D2O-content poly-N,N,-dimethylacrylamide (PDMAA) hydrogels were measured in temperature range from 10 to 300 K to investigate structure of water in hydrogels. The results show that amorphous, cubic, and hexagonal ices exist in the low D2O-content PDMAA hydrogel at low temperature, whereas only hexagonal ice exists in the high D2O content PDMAA hydrogel.