Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Igarashi, Takahiro; Nakazawa, Tetsuya; Tsuru, Tomohito; Kaji, Yoshiyuki
no journal, ,
no abstracts in English
Takahashi, Yasuyuki; Narumi, Kazumasa; Chiba, Atsuya; Saito, Yuichi; Yamada, Keisuke; Ishikawa, Norito; Sugai, Hiroyuki; Maeda, Yoshihito
no journal, ,
no abstracts in English
ssbauer spectroscopy of GdFe
Mitsui, Takaya; Seto, Makoto; Masuda, Ryo; Hirao, Naohisa*
no journal, ,
no abstracts in English
Sakai, Kenji; Muto, Suguru*; Ino, Takashi*; Yoshioka, Tamaki*; Mishima, Kenji*; Taketani, Kaoru*; Shimizu, Hirohiko*
no journal, ,
no abstracts in English
Okubo, Takeru; Ishii, Yasuyuki
no journal, ,
Chromatic and spherical aberrations are hindrance in a development of acceleration lens system to form the nanobeam with 1 MeV ion beam. However, chromatic and spherical aberrations are hindrance to form the nanobeam. Optics simulations were carried out to show that a combination of acceleration lenses and deceleration lenses is effective to reduce chromatic and spherical aberrations in the acceleration lens system. As a result, the deceleration energy of 15 keV for the 46 keV hydrogen molecule ion beam enabled us to reduce the chromatic aberration coefficient by 26 % and the spherical aberration coefficient by 17 %, and the beam current increased by 27 %.
Takeda, Yukiharu; Okane, Tetsuo; Okochi, Takuo; Saito, Yuji; Yamagami, Hiroshi; Fujimori, Atsushi; Ochiai, Akira*
no journal, ,
no abstracts in English
RuKoizumi, Mitsuo; Toh, Yosuke; Oshima, Masumi; Kimura, Atsushi; Hatsukawa, Yuichi; Harada, Hideo; Kitatani, Fumito; Nakamura, Shoji; Furutaka, Kazuyoshi; Sugawara, Masahiko*; et al.
no journal, ,
no abstracts in English
Sm synchrotron Mssbauer studies on hydrides of rare-earth-iron compoundsMasuda, Ryo; Mitsui, Takaya; Ito, Keiji*; Kobayashi, Yasuhiro*; Kitao, Shinji*; Seto, Makoto
no journal, ,
no abstracts in English
Inamura, Yasuhiro; Nakajima, Kenji; Kajimoto, Ryoichi; Otomo, Toshiya*; Nakatani, Takeshi; Suzuki, Jiro*; Arai, Masatoshi; So, J.-Y.*; Park, J.-G.*; Perring, T.*; et al.
no journal, ,
We report the plan and current status of development for software used on high-intensity chopper spectrometer, 4SEASONS, and Cold Neutron Disk-Chopper Spectrometer, CNDCS, at Materials and Life Science Facility(MLF), J-PARC. We begin to design software packages based on many required functions for performing experiments and analysis, for example control spectrometer system (data acquisition, devices), suggestion of experiment conditions, visualization and so on. This project progresses with software company. On the other hand, we started to collaborate with Korean group about the development of analysis software for inelastic scattering. In this presentation, we will present the current status and plan for software development including collaboration with Korean group.
Oku, Takayuki; Kira, Hiroshi; Shinohara, Takenao; Takata, Shinichi; Arai, Masatoshi; Suzuki, Junichi
no journal, ,
no abstracts in English
Kando, Masaki; Kawase, Keigo; Kameshima, Takashi; Kotaki, Hideyuki; Daito, Izuru; Fukuda, Yuji; Faenov, A. Y.; Pikuz, T.*; Esirkepov, T. Zh.; Bulanov, S. V.
no journal, ,
no abstracts in English
Ito, Takayoshi; Harjo, S.; Aizawa, Kazuya; Moriai, Atsushi; Abe, Jun; Arima, Hiroshi; Nakatani, Takeshi; Sakasai, Kaoru; Nakamura, Tatsuya; Iwahashi, Takaaki; et al.
no journal, ,
no abstracts in English
Kawana, Daichi; Watanuki, Tetsu; Machida, Akihiko; Aoki, Katsutoshi; Tsai, A. P.*
no journal, ,
no abstracts in English
Al
Matsuda, Tatsuma; Haga, Yoshinori; Aoki, Dai*; Tateiwa, Naoyuki; Homma, Yoshiya*; Ikeda, Shugo*; Shiokawa, Yoshinobu*; Settai, Rikio*; Onuki, Yoshichika
no journal, ,
no abstracts in English
Fukaya, Yuki
no journal, ,
no abstracts in English
Fukuda, Tatsuo; Baron, A. Q. R.*; Shamoto, Shinichi; Uchiyama, Hiroshi*; Ishikado, Motoyuki; Nakamura, Hiroki; Machida, Masahiko; Mizuki, Junichiro; Arai, Masatoshi; Iyo, Akira*; et al.
no journal, ,
Recently discovered iron-arsenide new superconductor has attracted considerable attraction. Within a few months the transition temperature (
) exceeded 50 K in some related compounds, and the possible novel physics as well as higher- are expected. At the early stage, calculations of phonon properties appeared and suggested that the superconductivity in these materials are not phonon mediated. However, the experimental verification is crucial. We carried out inelastic X-ray scattering on some powder as well as single samples, and found pronounced softening of the Fe-As modes compared to LDA-based phonon calculations. However, further investigation on single crystals showed the spectra are found to agree much better with calculations of the magnetic parent material, which has orthorhombic symmetry, than those using a tetragonal structure like the real superconducting compounds.
Maekawa, Masaki; Kawasuso, Atsuo
no journal, ,
We have developed a positron microprobe apparatus and also applied it for the research of the nuclear materials. Although the Doppler-broadening measurement was possible using continuous positron beam, positron lifetime annihilation measurement can be carried out using pulsed positron beam formed by a pulsing system which is inserting in the beam line. From the performance test, pulse width of approximately 150ps was confirmed. It was also confirmed that a difference of the lifetime of stainless steel and silicone was detectable. Moreover, our apparatus can be utilized also as a usual scanning electron microscope using the electron gun equipped on the beam port. The complex research using a positron and an electron beam might be possible.
Sugai, Takashi; Haga, Yoshinori; Matsuda, Tatsuma; Yamamoto, Etsuji; Tateiwa, Naoyuki
no journal, ,
no abstracts in English
Hayakawa, Takehito; Iwamoto, Nobuyuki; Kajino, Toshitaka*; Shizuma, Toshiyuki; Umeda, Hideyuki*; Nomoto, Kenichi*
no journal, ,
About 99% of nuclides heavier than an iron group were dominantly synthesized by neutron capture nucleosynthesis processes. In contrast, there is 35 p-nuclei, which cannot be synthesized by the neutron capture reactions. Among the 35 p-nuclei, evidence that 27 p-nuclei are synthesized by photon-induced reactions in supernova explosions was found. However, the origin of the other 8 p-nuclei has been remained as an open question. Here we discuss the method to understand these origin by using astronomical observation and meteorite analyses. We suggest a primitive meteorite analysis for the study of Mo, Ru, and Sm origins. Since Mo and Ru (Sm) locate near the neutron magic number of N=50 (82), their origins may be correlated. There are two isotopes of In-113 and In-115 and astronomical observation of these two isotope ratio is useful for understanding the origin of these nuclei.
Daido, Hiroyuki
no journal, ,
no abstracts in English