De-excitation dynamics of muonic atoms revealed by high precision spectroscopy of electronic K x rays using a superconducting transition-edge sensor microcalorimeter

Published

July 27, 2021

Author(s)

Douglas Bennett, W.Bertrand (Randy) Doriese, Malcolm Durkin, Joseph Fowler, Johnathon Gard, Gene C. Hilton, Kelsey Morgan, Galen O'Neil, Carl D. Reintsema, Dan Schmidt, Daniel Swetz, Joel Ullom, Toshiyuki Azuma, Pietro Caradonna, I-Huan Chiu, Tadashi Hashimoto, Ryota Hayakawa, Yuto Ichinohe, Paul Indelicato, TadaAki Isobe, Sohtaro Kanda, Daiji Kato, Miho Katsuragawa, Naritoshi Kawamura, Yasushi Kino, Kenya Kubo, Kairi Mine, Yasuhiro Miyake, Kazuhiko Ninomiya, Hirofumi Noda, Shinji Okada, Takuma Okumura, Kenichi Okutsu, Takahito Osawa, Nancy Paul, Kouichiro Shimomura, Patrick Strasser, Hirotaka Suda, Tadayuki Takahashi, Shinichiro Takeda, Soshi Takeshita, Motonobu Tampo, Hideyuki Tatsuno, XiaoMin Tong, Yasuhiro Ueno, Shin Watanabe, Shinya Yamada

Abstract

We observed electronic K x rays emitted from muonic iron atoms using a superconducting transition-edge-type sensor microcalorimeter. The energy resolution of 5.2 eV in FWHM allowed us to observe the asymmetric broad profile of the electronic characteristic Kα and Kβ x rays together with the hypersatellite Khα x rays around 6 keV. This signature reflects the time-dependent screening of the nuclear charge by the negative muon and the L-shell electrons, accompanied by electron side-feeding. Assisted by a simulation, this data clearly reveals the electronic K- and L-shell hole production and their temporal evolution during the muon cascade process.

Citation

Physical Review Letters

Pub Type

Journals

Download Paper

https://doi.org/10.1103/PhysRevLett.127.053001

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Keywords

x-ray, muonic, exotic atom

Citation

Bennett, D. , Doriese, W. , Durkin, M. , Fowler, J. , Gard, J. , Hilton, G. , Morgan, K. , O'Neil, G. , Reintsema, C. , Schmidt, D. , Swetz, D. , Ullom, J. , Azuma, T. , Caradonna, P. , Chiu, I. , Hashimoto, T. , Hayakawa, R. , Ichinohe, Y. , Indelicato, P. , Isobe, T. , Kanda, S. , Kato, D. , Katsuragawa, M. , Kawamura, N. , Kino, Y. , Kubo, K. , Mine, K. , Miyake, Y. , Ninomiya, K. , Noda, H. , Okada, S. , Okumura, T. , Okutsu, K. , Osawa, T. , Paul, N. , Shimomura, K. , Strasser, P. , Suda, H. , Takahashi, T. , Takeda, S. , Takeshita, S. , Tampo, M. , Tatsuno, H. , Tong, X. , Ueno, Y. , Watanabe, S. and Yamada, S. (2021), De-excitation dynamics of muonic atoms revealed by high precision spectroscopy of electronic K x rays using a superconducting transition-edge sensor microcalorimeter, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.127.053001, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=931870 (Accessed October 9, 2025)