Negative muon capture ratios for nitrogen oxide molecules

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

https://doi.org/10.1007/s10967-018-6366-3

Nondestructive elemental depth-profiling analysis by muonic X-ray measurement

Ninomiya, Kazuhiko*; Kubo, Kenya*; Nagatomo, Takashi*; Higemoto, Wataru; Ito, Takashi; Kawamura, Naritoshi*; Strasser, P.*; Shimomura, Koichiro*; Miyake, Yasuhiro*; Suzuki, Takao*; et al.

Analytical Chemistry, 87(9), p.4597 - 4600, 2015/05

https://doi.org/10.1021/acs.analchem.5b01169

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.

Precision measurement of the electric quadrupole moment of Al and determination of the effective proton charge in the sd-shell

De Rydt, M.*; Neyens, G.*; Asahi, Koichiro*; Balabanski, D. L.*; Daugas, J. M.*; Depuydt, M.*; Gaudefroy, L.*; Grvy, S.*; Hasama, Yuka*; Ichikawa, Yuichi*; et al.

Physics Letters B, 678(4), p.344 - 349, 2009/07

https://doi.org/10.1016/j.physletb.2009.06.043

no abstracts in English

Simultaneous generation of UV harmonics and protons from a thin-foil target with a high-intensity laser

Sagisaka, Akito; Daido, Hiroyuki; Pirozhkov, A. S.; Ma, J.-L.; Yogo, Akifumi; Ogura, Koichi; Orimo, Satoshi; Mori, Michiaki; Nishiuchi, Mamiko; Kawachi, Tetsuya; et al.

IEEE Transactions on Plasma Science, 36(4), p.1812 - 1816, 2008/08

https://doi.org/10.1109/TPS.2008.2000897

We observe UV harmonics and protons with a thin-foil target irradiated with a high-intensity Ti:sapphire laser. The laser intensity dependency of UV harmonics and proton signal is measured by varying the distance between the target surface and the best focus of the laser beam. In the case of appropriate condition for proton generation with a maximum energy of 2.7 MeV, the weak broad spectrum in the UV region is generated. The UV harmonics up to fourth-order are generated as the target is moved away from the best focus position. In this condition the maximum energy of protons is reduced to 1 MeV.

Laser-driven proton acceleration from a near-critical density target

Yogo, Akifumi; Daido, Hiroyuki; Bulanov, S. V.; Esirkepov, T. Z.; Nemoto, Koshichi*; Oishi, Yuji*; Nayuki, Takuya*; Fujii, Takashi*; Ogura, Koichi; Orimo, Satoshi; et al.

Journal of Physics; Conference Series, 112, p.042034_1 - 042034_4, 2008/00

https://doi.org/10.1088/1742-6596/112/4/042034

In this work, we present a new method to enhance the proton generation by a 10-contrast laser. High-energy protons up to 3.8 MeV are observed with 7.5-m-thick insulator (Polyimide) target irradiated by a laser pulse having energy of 0.8 J and an intensity of 10-W/cm. Using two time-of-flight (TOF) spectrometers simultaneously in different directions, we measure the direction dependency of proton-energy spectra. As a result, we find that high-energy component of proton beam is shifted away from the target normal toward the laser-propagation direction, when the laser is focused with 45 incident angle. The TOF measurements over 130 laser shots confirm that the generation of the high-energy protons, which are steered away from the target normal, depends strongly on the laser-focusing condition.

Electric quadrupole moment measurement using a new RF-application system

Nagae, Daisuke; Takemuara, Makoto*; Ueno, Hideki*; Kameda, Daisuke*; Asahi, Koichiro*; Yoshimi, Akihiro*; Sugimoto, Takashi*; Nagatomo, Takashi*; Kobayashi, Yoshio*; Uchida, Makoto*; et al.

no journal, , 

An electric quadrupole moment ( moment) is sensitive to collective aspects of nuclear structure. In the -moment measurement for unstable nuclei, we employ the -detected nuclear-quadrupole resonance method. In this method, we need to supply resonance frequencies, where denotes the nuclear spin. We have developed a new RF-application system to induced all of the transitions. The application of the frequencies may be pursued in two different ways; the sequential RF pulse method and the mixed-wave RF pulse method. We confirmed the reversal of polarization for the both methods, from measurements of -ray asymmetry change for polarized B. Using this system, the moments of Al have been measured to be mb and mb by the sequential RF pulse method.

Generation of high-energy proton and electromagnetic waves with a high-intensity laser

Sagisaka, Akito; Daido, Hiroyuki; Pirozhkov, A. S.; Ma, J.-L.; Yogo, Akifumi; Ogura, Koichi; Orimo, Satoshi; Mori, Michiaki; Nishiuchi, Mamiko; Kawachi, Tetsuya; et al.

no journal, , 

High-intensity laser and thin-foil interactions produce high energy ions, electrons, X-ray, high-order harmonics, and THz radiation. High-energy protons driven by the high-intensity laser is paid attention as a compact ion source for medical application. The simultaneous generation of the protons and THz or harmonics will provide us high-density plasma diagnostic or unique pump-probe techniques. We use a Ti:sapphire laser system (JLITE-X) in JAEA for THz radiation. The laser beam is focused by an off-axis parabolic mirror at the 5 m thick Ti target. We observe simultaneously both the high-energy proton and THz radiation by changing the duration of ASE preceding the main pulse. We use a Ti:sapphire laser system in CRIEPI for harmonic generation. The laser beam is focused by an off-axis parabolic mirror at the 7.5 m thick polyimide target surface. The high-energy protons and UV harmonics are observed at the target is moved away from the best focus.

Development of elemental analysis by measuring muonic X-rays

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.

Negative muon initial state captured in nitrogen oxide

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.