Magnetic and electrical properties of the ternary compound UIrSi with one-dimensional uranium zigzag chains

Li, D. X.*; Honda, Fuminori*; Miyake, Atsushi*; Homma, Yoshiya*; Haga, Yoshinori; Nakamura, Ai*; Shimizu, Yusei*; Maurya, A.*; Sato, Yoshiki*; Tokunaga, Masashi*; et al.

Physical Review B, 99(5), p.054408_1 - 054408_9, 2019/02

https://doi.org/10.1103/PhysRevB.99.054408

Tuning of ultra-slow muon transport system

Adachi, Taihei*; Ikedo, Yutaka*; Nishiyama, Kusuo*; Yabuuchi, Atsushi*; Nagatomo, Takashi*; Strasser, P.*; Ito, Takashi; Higemoto, Wataru; Kojima, Kenji*; Makimura, Shunsuke*; et al.

JPS Conference Proceedings (Internet), 8, p.036017_1 - 036017_4, 2015/09

https://doi.org/10.7566/JPSCP.8.036017

X-ray absorption spectroscopy and novel electronic properties in heavy fermion compounds YbTZn (T: Rh and Ir)

Honda, Fuminori*; Hirose, Yusuke*; Miyake, Atsushi*; Mizumaki, Masaichiro*; Kawamura, Naomi*; Tsutsui, Satoshi*; Watanuki, Tetsu; Watanabe, Shinji*; Takeuchi, Tetsuya*; Settai, Rikio*; et al.

Journal of Physics; Conference Series, 592(1), p.012021_1 - 012021_5, 2015/03

https://doi.org/10.1088/1742-6596/592/1/012021

no abstracts in English

Development of nondestructive and quantitative elemental analysis method using calibration curve between muonic X-ray intensity and elemental composition in bronze

Ninomiya, Kazuhiko; Nagatomo, Takashi*; Kubo, Kenya*; Ito, Takashi; Higemoto, Wataru; Kita, Makoto*; Shinohara, Atsushi*; Strasser, P.*; Kawamura, Naritoshi*; Shimomura, Koichiro*; et al.

Bulletin of the Chemical Society of Japan, 85(2), p.228 - 230, 2012/02

https://doi.org/10.1246/bcsj.20110151

Elemental analysis of bulk materials can be performed by detecting the high-energy X-rays emitted from muonic atoms. Muon irradiation of standard bronze samples was performed to determine the muon capture probabilities for the elemental components from muonic X-ray spectra. Nondestructive elemental analysis of an ancient Chinese coin was also performed.

Observation of ion cyclotron emission owing to DD fusion product H ions in JT-60U

Sato, Shoichi*; Ichimura, Makoto*; Yamaguchi, Yusuke*; Katano, Makoto*; Imai, Yasutaka*; Murakami, Tatsuya*; Miyake, Yuichiro*; Yokoyama, Takuro*; Moriyama, Shinichi; Kobayashi, Takayuki; et al.

Plasma and Fusion Research (Internet), 5, p.S2067_1 - S2067_4, 2010/12

https://doi.org/10.1585/pfr.5.S2067

Ion cyclotron emissions (ICEs) due to deuterium-deuterium fusion-product (FP) ions on JT-60U are studied. ICE due to H-ions is identified from the difference of the toroidal wave number of 2nd ICE(D). The parameter dependence for the appearance of ICE(H) is investigated from the experimental conditions and also is studied by using "Escape Particle Orbit analysis Code (EPOC)".

Electrical resistivity measurements of single crystalline -Mn under high pressure

Miyake, Atsushi*; Kanemasa, Tsunehiro*; Yagi, Ryohei*; Kagayama, Tomoko*; Shimizu, Katsuya*; Haga, Yoshinori; Onuki, Yoshichika

Journal of Magnetism and Magnetic Materials, 310(2, Part1), p.e222 - e224, 2007/03

We have measured electrical resistivity of single crystalline -manganese (-Mn) under high pressure. -Mn shows an antiferromagnetic ordering at = 95 K and has four inequivalent crystal sites with different magnetic moments. With increasing pressure, shifts toward lower temperature. At higher pressure, the shape of anomaly at changes to a kink-like one, which may indicate different magnetic ordering from that at lower pressure. Such a difference between lower and higher pressure regions is considered to be caused by the four inequivalent magnetic moments in -Mn. At 1.9 GPa, the boundary of the ordered phases, we observe a sudden decrease of the residual resistivity and a peak of the A-coefficient of -term of the resistivity.

Investigation of muon atomic capture ratio between cupper and tin in bronze

Ninomiya, Kazuhiko; Nagatomo, Takashi*; Kubo, Kenya*; Kita, Makoto*; Shinohara, Atsushi*; Ito, Takashi; Strasser, P.*; Kawamura, Naritoshi*; Shimomura, Koichiro*; Miyake, Yasuhiro*; et al.

no journal, , 

We determined muon capture probability for cupper, tin and lead atoms in bronze from muonic X-ray measurement. We also performed muon irradiation for old Chinese coin and determined contents of this sample.

Investigation of initial state of captured muon by measuring muonic X-rays

Ninomiya, Kazuhiko; Kita, Makoto*; Ito, Takashi; Nagatomo, Takashi*; Kubo, Kenya*; Shinohara, Atsushi*; Strasser, P.*; Kawamura, Naritoshi*; Shimomura, Koichiro*; Miyake, Yasuhiro*; et al.

no journal, , 

Muonic atom is an atom like system that has one negatively charged muon instead of an electron. It is known that the initial state of captured muon is influenced by the outer electron structure of muon capturing molecule and some muon capture models have been proposed. To investigate the molecular effect in muonic atom formation, we performed muon irradiation for low pressure NO and NO gases and measured muonic X-rays emitted from muonic atoms. We found that the muon capture models are not reproduced our results.

Negative muon coulomb capture on nitrogen oxide molecules

Ninomiya, Kazuhiko; Ito, Takashi; Higemoto, Wataru; Kita, Makoto*; Shinohara, Atsushi*; Nagatomo, Takashi*; Kubo, Kenya*; Strasser, P.*; Kawamura, Naritoshi*; Shimomura, Koichiro*; et al.

no journal, , 

A muonic atom is an atomic system that contains one negatively charged muon (muon is one of elementally particles) instead of an electron. When a muon is injected in material, the muon is slowing down by collisions with atomic electrons, and then low energy muon is captured on the coulomb field of a nucleus. As a result, the muon forms an atomic orbit around the nucleus, that is, a muonic atom is formed. It is considered that a muon capture phenomenon proceeds through muon collision and replacement with loosely binding electron, however the intrinsic mechanism of muon capture have not been investigated yet. In this study, we examine the formation processes of muonic atoms for nitrogen oxide samples (NO, NO and NO) by measuring muon characteristic X-rays (muonic X-rays) emitted after formation of muonic atoms.

Pressure dependence of muonic X-ray structures for dinitrogen oxide gas samples

Ninomiya, Kazuhiko; Ito, Takashi; Higemoto, Wataru; Strasser, P.*; Kawamura, Naritoshi*; Shimomura, Koichiro*; Miyake, Yasuhiro*; Miura, Taichi*; Kita, Makoto*; Shinohara, Atsushi*; et al.

no journal, , 

A muonic atom is an atomic system that has one negatively charged muon instead of an electron. There are many studies related to the formation process of muonic atom by measuring muon characteristic X-rays. It is known that muon characteristic X-ray intensities are influenced by the density of the sample itself. However, most of previous studies did not consider this effect. In this study, we measured muon characteristic X-rays for dinitrogen mono-oxide with 0.1-1.0 atm. The same muonic X-ray intensities were obtained below 0.2 atm condition. This result means the density effect is neglectable below 0.2 atm for dinitrogen mono-oxide gas.