Few-electron highly charged muonic Ar atoms verified by electronic K xrays

Published

July 10, 2024

Author(s)

Takuma Okumura, Toshiyuki Azuma, Douglas Bennett, W. Bertrand (Randy) Doriese, Malcolm Durkin, Joseph Fowler, Johnathon Gard, Tadashi Hashimoto, Ryota Hayakawa, Yuto Ichinohe, Paul Indelicato, Tadaaki Isobe, Sohtaro Kanda, Daiji Kato, Miho Katsuragawa, Naritoshi Kawamura, Yasushi Kino, Nao Kominato, Yasuhiro Miyake, Kelsey Morgan, Hirofumi Noda, Galen O'Neil, Shinji Okada, Kenichi Okutsu, Nancy Paul, Carl D. Reintsema, Toshiki Sato, Dan Schmidt, Kouichiro Shimomura, Patrick Strasser, Daniel Swetz, Tadayuki Takahashi, Shinichiro Takeda, Soshi Takeshita, Motonobu Tampo, Hideyuki Tatsuno, Tong Xiao-Min, Joel Ullom, Shin Watanabe, Shinya Yamada, Takuma Yamashita

Abstract

Electronic K x rays emitted by muonic Ar atoms in the gas phase were observed using a superconducting transition-edge-sensor microcalorimeter. The high-precision energy spectra provided a clear signature of the presence of muonic atoms accompanied by a few electrons. H-like, He-like, and Li-like muonic Ar atoms were identified from K x rays and hyper-satellite K x rays. These electronic K x rays are emitted after the charge transfer process of the muonic Ar atoms by the collisions with surrounding Ar atoms. With the aid of theoretical simulations, we confirmed that the peak positions are consistent with the x-ray energies from highly charged Cl ions, and the intensities reflecting deexcitation dynamics were successfully understood by taking into account the interaction between the muon and bound electrons.

Citation

Physical Review Letters

Pub Type

Journals

Keywords

x-ray spectroscopy, muon, muonic atom, exotic atom, tes, microcalorimeter

Citation

Okumura, T. , Azuma, T. , Bennett, D. , Doriese, W. , Durkin, M. , Fowler, J. , Gard, J. , Hashimoto, T. , Hayakawa, R. , Ichinohe, Y. , Indelicato, P. , Isobe, T. , Kanda, S. , Kato, D. , Katsuragawa, M. , Kawamura, N. , Kino, Y. , Kominato, N. , Miyake, Y. , Morgan, K. , Noda, H. , O'Neil, G. , Okada, S. , Okutsu, K. , Paul, N. , Reintsema, C. , Sato, T. , Schmidt, D. , Shimomura, K. , Strasser, P. , Swetz, D. , Takahashi, T. , Takeda, S. , Takeshita, S. , Tampo, M. , Tatsuno, H. , Xiao-Min, T. , Ullom, J. , Watanabe, S. , Yamada, S. and Yamashita, T. (2024), Few-electron highly charged muonic Ar atoms verified by electronic K xrays, Physical Review Letters (Accessed August 13, 2024)