{"paper":{"title":"Few-electron highly charged muonic Ar atoms verified by electronic $K$ x rays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"C. D. Reintsema, D. A. Bennett, D. Kato, D. R. Schmidt, D. S. Swetz, G. C. O'Neil, H. Noda, H. Tatsuno, J. D. Gard, J. N. Ullom, J. W. Fowler, K. M. Morgan, K. Okutsu, K. Shimomura, K. T\\H{o}k\\'esi, M. Katsuragawa, M. S. Durkin, M. Tampo, N. Kawamura, N. Kominato, N. Paul, P. Indelicato, P. Strasser, R. Hayakawa, S. Kanda, S. Okada, S. Takeda, S. Takeshita, S. Watanabe, S. Yamada, T. Azuma, T. Hashimoto, T. Isobe, T. Okumura, T. Sato, T. Takahashi, T. Yamashita, W. B. Doriese, X. M. Tong, Y. Ichinohe, Y. Kino, Y. Miyake, Y. Toyama","submitted_at":"2024-07-10T18:14:45Z","abstract_excerpt":"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, which have never been observed before. One-, two-, and three-electron bound, i.e., H-like, He-like, and Li-like, muonic Ar atoms were identified from electronic $K$ x rays and hyper-satellite $K$ x rays. These $K$ x rays are emitted after the charge transfer process by the collisions with surrounding Ar atoms. With the aid of th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.07977","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2407.07977/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}