Role of resonance states of muonic molecule in muon catalyzed fusion

Kenichi Okutsu; Takuma Yamashita; Yasushi Kino; Konan Miyashita; Kazuhiro Yasuda; Toshitaka Oka; Shinji Okada; Motoyasu Sato

doi:10.56646/jjapcp.9.0_011003

4th Japan-China Joint Workshop on Positron Science (JWPS2019)

Session ID : 011003

DOI https://doi.org/10.56646/jjapcp.9.0_011003

Conference information

Host: The organizing committee of JWPS2019

Name : 4th Japan-China Joint Workshop on Positron Science (JWPS2019)

Location : Nara, Japan

Date : October 28, 2019 - November 02, 2019

Theory and related experiments on physics and chemistry

Role of resonance states of muonic molecule in muon catalyzed fusion

Kenichi Okutsu, Takuma Yamashita, Yasushi Kino, Konan Miyashita, Kazuhiro Yasuda, Toshitaka Oka, Shinji Okada, Motoyasu Sato

Author information

Kenichi Okutsu
Department of Chemistry, Graduate School of Science, Tohoku University, 6–3 Aramaki Aza-Aoba, Aoba, Sendai, Miyagi 980–8578, Japan
Takuma Yamashita
Department of Chemistry, Graduate School of Science, Tohoku University, 6–3 Aramaki Aza-Aoba, Aoba, Sendai, Miyagi 980–8578, Japan
Institute for Excellence in Higher Education, Tohoku University, 41 Kawauchi, Aoba, Sendai, Miyagi 980–8576, Japan
Yasushi Kino
Department of Chemistry, Graduate School of Science, Tohoku University, 6–3 Aramaki Aza-Aoba, Aoba, Sendai, Miyagi 980–8578, Japan
Konan Miyashita
Department of Chemistry, Graduate School of Science, Tohoku University, 6–3 Aramaki Aza-Aoba, Aoba, Sendai, Miyagi 980–8578, Japan
Kazuhiro Yasuda
Department of Chemistry, Graduate School of Science, Tohoku University, 6–3 Aramaki Aza-Aoba, Aoba, Sendai, Miyagi 980–8578, Japan
Toshitaka Oka
Nuclear Science and Engineering Center, Japan Atomic Energy Agency, 2–4 Shirakara, Tokai-mura, Naka, Ibaraki 319–1195, Japan
Shinji Okada
Department of Innovative Energy Science and Engineering, Graduate School of Engineering, 1200 Matsumoto-cho, Chubu University, Kasugai, Aichi 487–8501, Japan
Motoyasu Sato
Department of Innovative Energy Science and Engineering, Graduate School of Engineering, 1200 Matsumoto-cho, Chubu University, Kasugai, Aichi 487–8501, Japan

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Abstract

Muon catalyzed fusion (μCF) is a cyclic reaction where a negatively charged muon itself acts like a catalyst of nuclear fusion between hydrogen isotopes. In the μCF reaction, muon transfer from deuteron to triton and muonic molecular formation are rate-limiting processes. In this work, we have investigated the role of resonance states of muonic molecule in the μCF which affects the muonic deuterium atom population. Solving simultaneous rate equations numerically by the fourth-order Runge-Kutta method, we determined the muonic molecular formation rate so that the number of fusion events reproduces a latest experimental result. It is revealed that the resonance states play a role to enhance the fusion rate by accelerating the de-excitation of the muonic atoms.

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