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Yamaki, Tetsuya; Nuryanthi, N.*; Koshikawa, Hiroshi; Asano, Masaharu; Sawada, Shinichi; Hakoda, Teruyuki; Maekawa, Yasunari; Voss, K.-O.*; Severin, D.*; Seidl, T.*; et al.
Nuclear Instruments and Methods in Physics Research B, 314, p.77 - 81, 2013/11
Times Cited Count：3 Percentile：26.71(Instruments & Instrumentation)Ion-track membranes of poly(vinylidene fluoride) (PVDF), a type of fluoropolymer, could find wide applications due to its superior chemical and mechanical properties. In order to produce track-etched pores in PVDF films, we have independently employed much milder etching conditions without any oxidant additives in the alkaline etching solution. The goal of this work is to pursue the possibility of varying beam parameters and applying the effect of the etching pretreatment to control the pore size and shape. Ongoing in-situ/on-line analyses at the M-branch of the UNILAC would shed light on the detailed chemistry of not only ion-induced degradation but also the post-irradiation reactivity.
at the MLF, J-PARCTakahashi, Nobuaki; Shibata, Kaoru; Kawakita, Yukinobu; Nakajima, Kenji; Inamura, Yasuhiro; Nakatani, Takeshi; Nakagawa, Hiroshi; Fujiwara, Satoru; Sato, Taku*; Tsukushi, Itaru*; et al.
Journal of the Physical Society of Japan, 80(Suppl.B), p.SB007_1 - SB007_4, 2011/12
Times Cited Count：6 Percentile：43.42(Physics, Multidisciplinary)Shibata, Kaoru; Takahashi, Nobuaki; Nakajima, Kenji; Kawakita, Yukinobu*; Sato, Taku*; Tsukushi, Itaru*; Nakagawa, Hiroshi; Fujiwara, Satoru; Mezei, F.*; Mutka, H.*; et al.
no journal, ,
We are planning and partially beginning the construction of the near backscattering Si crystal analyzer spectrometer DNA at the Material and Life Science Facility (MLF), J-PARC. The optical specification of DNA is as follows. In the center of the vacuum chamber, a sample position is located at 42 m away form the coupled moderator. The analyzer banks of Si(111) and Si(311) single crystal wafers which are pasted on the spherical surface, are mounted at the right and left side each in the vacuum chamber. The Bragg angle of those analyzer crystals are about 87.5 deg and the distance between the sample position and the analyzer crystal is about 2.3 m. The analyzed neutron beams are detected by the 
Hee gas position sensitive detector located at around the sample position. Then the expected energy resolution and the dynamic range of the Si(111) crystal analyzer are about 1 micro-eV and 
40 micro-eV, respectively. We will report the optical principle and specification of DNA spectrometer.
Takahashi, Nobuaki; Shibata, Kaoru; Nakajima, Kenji; Arai, Masatoshi; Kawakita, Yukinobu*; Sato, Taku*; Tsukushi, Itaru*; Nakagawa, Hiroshi; Fujiwara, Satoru; Mezei, F.*; et al.
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no abstracts in English
Shibata, Kaoru; Takahashi, Nobuaki; Nakajima, Kenji; Kambara, Wataru; Kawakita, Yukinobu*; Sato, Taku*; Tsukushi, Itaru*; Nakagawa, Hiroshi; Fujiwara, Satoru; Mezei, F.*; et al.
no journal, ,
no abstracts in English
Takahashi, Nobuaki; Shibata, Kaoru; Nakajima, Kenji; Arai, Masatoshi; Kawakita, Yukinobu*; Sato, Taku*; Tsukushi, Itaru*; Nakagawa, Hiroshi; Fujiwara, Satoru; Mezei, F.*; et al.
no journal, ,
no abstracts in English
Shibata, Kaoru; Takahashi, Nobuaki; Kawakita, Yukinobu; Nakajima, Kenji; Inamura, Yasuhiro; Nakatani, Takeshi; Aizawa, Kazuya; Soyama, Kazuhiko; Oikawa, Kenichi; Yoshida, Noboru; et al.
no journal, ,
A Si-crystal analyzer backscattering spectrometer DNA is planned to be installed at the pulsed neutron source of the Material and Life Science Facility (MLF), J-PARC, and the construction has partially begun in the summer of 2010. The field of expected scientific research on the DNA spectrometer is very wide including the soft matter dynamics, the bio-molecular dynamics, the chemical molecular dynamics, the characterizations of the functional materials and the spin dynamics in the magnetism.
Shibata, Kaoru; Takahashi, Nobuaki; Kawakita, Yukinobu; Nakajima, Kenji; Kambara, Wataru; Inamura, Yasuhiro; Nakatani, Takeshi; Aizawa, Kazuya; Soyama, Kazuhiko; Oikawa, Kenichi; et al.
no journal, ,
We are beginning the construction of the near backscattering Si crystal analyzer spectrometer DNA in the pulsed neutron source of the Material and Life Science Facility (MLF) at J-PARC. This is the spectrometer to cover the area of the micro-eV energy range in the several spectrometers which are in the construction or planned the construction in MLF. The field of expected scientific research on the DNA spectrometer is very wide including the soft matter dynamics, the bio-molecular dynamics, the chemical molecular dynamics, the characterizations of the functional materials and the spin dynamics in the magnetism. We will report the present status of the construction schedule on DNA.
Takahashi, Nobuaki; Shibata, Kaoru; Kawakita, Yukinobu; Nakajima, Kenji; Inamura, Yasuhiro; Nakatani, Takeshi; Nakagawa, Hiroshi; Fujiwara, Satoru; Sato, Taku*; Tsukushi, Itaru*; et al.
no journal, ,
no abstracts in English
Shibata, Kaoru*; Takahashi, Nobuaki; Kawakita, Yukinobu; Kamazawa, Kazuya*; Yamada, Takeshi*; Ueno, Hiroki; Shimakura, Hironori; Nakajima, Kenji; Kambara, Wataru; Inamura, Yasuhiro; et al.
no journal, ,
no abstracts in English
Takahashi, Nobuaki; Shibata, Kaoru*; Kawakita, Yukinobu; Kamazawa, Kazuya*; Yamada, Takeshi*; Nakajima, Kenji; Inamura, Yasuhiro; Nakatani, Takeshi; Mezei, F.*; Neumann, D.*; et al.
no journal, ,
Shibata, Kaoru*; Takahashi, Nobuaki; Kawakita, Yukinobu; Kamazawa, Kazuya*; Yamada, Takeshi*; Ueno, Hiroki; Shimakura, Hironori; Nakajima, Kenji; Kambara, Wataru; Inamura, Yasuhiro; et al.
no journal, ,
no abstracts in English
Shibata, Kaoru*; Takahashi, Nobuaki; Kawakita, Yukinobu; Kamazawa, Kazuya*; Yamada, Takeshi*; Ueno, Hiroki; Shimakura, Hironori; Nakajima, Kenji; Kambara, Wataru; Inamura, Yasuhiro; et al.
no journal, ,
no abstracts in English
Takahashi, Nobuaki; Shibata, Kaoru*; Yamada, Takeshi*; Kamazawa, Kazuya*; Kawakita, Yukinobu; Nakajima, Kenji; Kambara, Wataru; Inamura, Yasuhiro; Nakatani, Takeshi; Aizawa, Kazuya; et al.
no journal, ,
A Si crystal analyzer near backscattering spectrometer DNA which covers the area of the micro-eV energy range in the Q-E space, where it is expected to explore sciences on atomic, molecular and spin dynamics in the nanosecond time range has been installed at BL02 of the Materials and Life Science Experimental Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC) until at the end of February 2012. Then, various on-beam commissioning has been done for about a year with handling continuing user program. In this report, we will introduce specifications, current status of the instrument.
Takahashi, Nobuaki; Shibata, Kaoru*; Yamada, Takeshi*; Kamazawa, Kazuya*; Kawakita, Yukinobu; Nakajima, Kenji; Kambara, Wataru; Inamura, Yasuhiro; Nakatani, Takeshi; Aizawa, Kazuya; et al.
no journal, ,
Yamaki, Tetsuya; Nuryanthi, N.*; Koshikawa, Hiroshi; Asano, Masaharu; Sawada, Shinichi; Hakoda, Teruyuki; Maekawa, Yasunari; Voss, K.-O.*; Severin, D.*; Seidl, T.*; et al.
no journal, ,
The possibility of varying the beam parameters and applying the effect of a pre-etching treatment for poly(vinylidene fluoride) (PVDF) ion-track membranes was investigated with the goal of achieving enhanced track etching for effective control of the pore size and shape. Commercially available 25 
m-thick PVDF films were irradiated at room temperature with swift heavy ions. Irradiation with a higher-LET beam gave faster track etching and larger pores, suggesting that the LET could be the most crucial factor determining the pore size. In-situ infra-red absorption and residual gas analyses shed light on the detailed chemistry of not only the ion-induced degradation, but also post-irradiation reactions. The pre-etching treatment effect involved oxidation of the unsaturated bonds within the latent track, which accelerated the chemical dissolution for efficient pore evolution. In other words, exposure to a gaseous oxidant, i.e., ozone, shortened the breakthrough time.
