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Ninomiya, Kazuhiko*; Ito, Takashi; Higemoto, Wataru; Kawamura, Naritoshi*; Strasser, P.*; Nagatomo, Takashi*; Shimomura, Koichiro*; Miyake, Yasuhiro*; Kita, Makoto*; Shinohara, Atsushi*; et al.
Journal of Radioanalytical and Nuclear Chemistry, 319(3), p.767 - 773, 2019/03
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
Times Cited Count:26 Percentile:60.58(Chemistry, Multidisciplinary)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.
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.
Ninomiya, Kazuhiko; Nagatomo, Takashi*; Kubo, Kenya*; Kita, Makoto*; Shinohara, Atsushi*; Ito, Takashi; Strasser, P.*; Kawamura, Naritoshi*; Shimomura, Koichiro*; Miyake, Yasuhiro*; et al.
no journal, ,
It is expected that muon irradiation and muonic X-ray detection emitted after formation of muonic atom can be applied to non-destructive elemental analysis. In this study, we performed muon irradiation for old Chinese bronze coin at MUSE in J-PARC and determined contents of this sample.
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.
Ninomiya, Kazuhiko; Ito, Takashi; Higemoto, Wataru; Kita, Makoto*; Shinohara, Atsushi*; Nagatomo, Takashi*; Kubo, Kenya*; Strasser, P.*; Kawamura, Naritoshi*; Shimomura, Koichiro*; 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 formation process of muonic atom is influenced by the structure of muon capturing molecule (molecular effect). In this study, we performed systematic muon irradiation for low pressure nitrogen oxide samples and discuss the molecular effect on muon capture phenomena.
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.
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. 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 emitted after formation of muonic atoms, and the muon capture probabilities for these samples were determined. In the previous muon capture model, muon capture probability for each atom in molecule muonic atom is strongly influenced by the number of localized electrons in the atom. However, in our work, the experimental results were not reproduced by the previous model. In this paper, we discuss what influences on the muon capture probability.
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.
Ninomiya, Kazuhiko; Ito, Takashi; Higemoto, Wataru; Strasser, P.*; Kawamura, Naritoshi*; Shimomura, Koichiro*; Miyake, Yasuhiro*; Miura, Taichi*; Kita, Makoto*; Shinohara, Atsushi*; et al.
no journal, ,
Muonic atom is an atomic system that has one negatively charged muon instead of an electron. Muonic atom is formed when a negative muon is stopped in matter. There are many studies of muonic atom formation by measuring muonic X-rays emitted after formation of muonic atom. From these studies, "molecular effect" on muonic atom formation becomes clear; different muonic X-ray structures are obtained from muon irradiations between allotropes. In addition, muonic X-ray intensity patterns are also influenced by density of muon irradiation sample (density effect). The quantitative examination of molecular and density effect is essential to investigate muonic atom formation process by measuring muonic X-rays. In this study, we investigated density effect of muonic X-ray structure for nitrogen oxide samples.
Ninomiya, Kazuhiko; Ito, Takashi; Higemoto, Wataru; Nagatomo, Takashi*; Strasser, P.*; Kawamura, Naritoshi*; Shimomura, Koichiro*; Miyake, Yasuhiro*; Miura, Taichi; Kita, Makoto*; et al.
no journal, ,
We have been studying on the formation process of muonic atom by measuring muonic X-rays. It is known that muonic X-ray intensities are changed by the state of muon capturing atom. These intensities also influenced by the density of the sample itself. There are many studies to investigate muonic atom formation by measuring muonic X-ray intensities, however, the pressure dependence of muonic X-ray intensities have not been examined well. In this study, we investigate the pressure dependence of muonic X-ray intensities for NO, NO and NO samples below 1 bar pressure conditions.