Initial quantum levels of captured muons in CO, CO2, and COS

Yoshida, Go; Ninomiya, Kazuhiko; Inagaki, Michio; Higemoto, Wataru; Strasser, P.; Kawamura, N.; Shimomura, K.; Miyake, Yasuhiro; Miura, Taichi; Kubo, K.; Shinohara, Atsushi

doi:10.1007/s10967-019-06470-4

Cited by 7 publications

(3 citation statements)

References 34 publications

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“…The Fermi-Teller law also has several versions of modifications [32,33]. In real experiments, the probability of muon capture is also influenced by the chemical environment in which the atom is located [17,34]. However, no theories describe this influence.…”

Section: Theory and Simulation Modelmentioning

confidence: 99%

Feasibility study of a coded aperture imaging technique for position-sensitive muonic X-ray atomic ratio reconstruction

Lin,

Pan,

Wang

et al. 2023

J. Inst.

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A position-sensitive multi-compound inspection methodology using Muonic X-ray Emission Spectroscopic (μ-XES) element analysis is proposed due to the ability of the coded aperture imaging technique to maintain the relative intensity of X-rays. This methodology can simultaneously obtain the atomic ratio of different regions of the sample under study. Therefore, the mis-judgements of material compositions caused by averaging results can be reduced. The atomic ratio reconstruction quality is mainly related to X-ray counts (Nx ), atomic ratios of materials (AT ), size and placement of sample blocks. In this work, several different sample blocks made of light elements were designed by GEANT4 Monte Carlo (MC) simulations to study the influences of Nx , AT , size and placement of sample on atomic ratio reconstruction quality. In the inspection of multiple sample blocks, this methodology successfully distinguished the material compositions from different regions by reconstructing the atomic ratios of C/N and O/N. Moreover, this methodology can clearly image element blocks larger than 2 × 2 mm2.

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Section: Theory and Simulation Modelmentioning

confidence: 99%

Feasibility study of a coded aperture imaging technique for position-sensitive muonic X-ray atomic ratio reconstruction

Lin,

Pan,

Wang

et al. 2023

J. Inst.

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“…Several studies have investigated the formation process of muonic atoms, and the muon capture probability for each atom in a material has been measured. These studies indicated that the muon capture probability is affected by the chemical environment, such as the molecular structure [15][16][17][18][19][20][21][22][23]. This known as the chemical effect [22].…”

Section: Introductionmentioning

confidence: 99%

Chemical effect on muonic atom formation through muon transfer reaction in benzene and cyclohexane samples

et al. 2021

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To investigate the chemical effect on the muon capture process through a muon transfer reaction from a muonic hydrogen atom, the formation rate of muonic carbon atoms is measured for benzene and cyclohexane molecules in liquid samples. The muon transfer rate to carbon atoms of the benzene molecule is higher than that to the carbon atoms of the cyclohexane molecule. Such a deviation has never been observed among those molecules for gas samples. This may be because the transfers occur from the excited states of muonic hydrogen atoms in the liquid system, whereas in the gas system, all the transfers occur from the 1s (ground) state of muon hydrogen atoms. The muonic hydrogen atoms in the excited states have a larger radius than those in the 1s state and are therefore considered to be affected by the steric hindrance of the molecular structure. This indicates that the excited states of muonic hydrogen atoms contribute significantly to the chemical effects on the muon transfer reaction.

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“…However, previous works largely performed qualitative analyses due to a lack of understanding of the muonic atom formation process and difficulty in obtaining good quality data from low-intensity muon beams. In recent years, fundamental research on muonic atom formation has been performed using an intense muon beam source in the Japan Proton Accelerator Research Complex (J-PARC) [27][28][29][30][31] . The use of such intense muon beam sources has made elemental analysis using muonic X-rays increasingly possible and significant progress has been made in applying this method to various samples, such as archeological artifacts, extraterrestrial materials, etc.…”

Section: Introductionmentioning

confidence: 99%

Non-destructive, position-selective, and multi-elemental analysis method involving negative muons

Ninomiya

2019

J. Nucl. Radiochem. Sci.

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Elemental analysis is of fundamental importance in several scientific domains. Many elemental analysis methods have been developed till date, with particular importance having been given to non-destructive analysis methods. In this paper, we review a novel non-destructive, position-selective, and multi-elemental analysis method for bulk material that utilizes a new type of probe, a negative muon. When a muon is stopped by an atom in a material, muonic X-rays are emitted. Due to the large mass of a muon, the energy of muonic X-rays is very high, and the "X-ray fluorescence analysis" method using a muon can solve the problem of self-absorption in an ordinary method using an electron. Two studies involving quantitative and depth-profiling analysis of archeological artifacts by this method are reviewed in this work. We also discuss the scope for future research using this method.

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Initial quantum levels of captured muons in CO, CO2, and COS

Cited by 7 publications

References 34 publications

Feasibility study of a coded aperture imaging technique for position-sensitive muonic X-ray atomic ratio reconstruction

Feasibility study of a coded aperture imaging technique for position-sensitive muonic X-ray atomic ratio reconstruction

Chemical effect on muonic atom formation through muon transfer reaction in benzene and cyclohexane samples

Non-destructive, position-selective, and multi-elemental analysis method involving negative muons

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