{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:59:05Z","timestamp":1760147945282,"version":"build-2065373602"},"reference-count":38,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2023,3,16]],"date-time":"2023-03-16T00:00:00Z","timestamp":1678924800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"DSC Grant MNiSzW","award":["Nr 7150\/E-338\/M\/2018","POWR.03.05.00-00-Z309\/17-00","UID\/04559\/2020","UI\/BD\/151000\/2021"],"award-info":[{"award-number":["Nr 7150\/E-338\/M\/2018","POWR.03.05.00-00-Z309\/17-00","UID\/04559\/2020","UI\/BD\/151000\/2021"]}]},{"name":"JIPhD program","award":["Nr 7150\/E-338\/M\/2018","POWR.03.05.00-00-Z309\/17-00","UID\/04559\/2020","UI\/BD\/151000\/2021"],"award-info":[{"award-number":["Nr 7150\/E-338\/M\/2018","POWR.03.05.00-00-Z309\/17-00","UID\/04559\/2020","UI\/BD\/151000\/2021"]}]},{"name":"Kosciuszko Foundation","award":["Nr 7150\/E-338\/M\/2018","POWR.03.05.00-00-Z309\/17-00","UID\/04559\/2020","UI\/BD\/151000\/2021"],"award-info":[{"award-number":["Nr 7150\/E-338\/M\/2018","POWR.03.05.00-00-Z309\/17-00","UID\/04559\/2020","UI\/BD\/151000\/2021"]}]},{"DOI":"10.13039\/501100001871","name":"FCT","doi-asserted-by":"publisher","award":["Nr 7150\/E-338\/M\/2018","POWR.03.05.00-00-Z309\/17-00","UID\/04559\/2020","UI\/BD\/151000\/2021"],"award-info":[{"award-number":["Nr 7150\/E-338\/M\/2018","POWR.03.05.00-00-Z309\/17-00","UID\/04559\/2020","UI\/BD\/151000\/2021"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Atoms"],"abstract":"<jats:p>We report measurements of hypersatellite radiation of argon ions in the electron energy region of 5200 eV to 7500 eV. Here, we observed a strong enhancement of this hypersatellite K\u03b1h production. Trielectronic recombination (TR) is discussed as a possible channel for K\u03b1h production leading to this enhancement where main TR resonances are expected to occur. Data analysis was mainly based on the extracted intensity ratio of hypersatellite K\u03b1h to K\u03b1 lines (K\u03b1h\/K\u03b1). In addition, the collisional excitation and the collisional ionisation of the K-shell ions were modeled as main background processes of the K\u03b1 X-ray production. The K\u03b1h\/K\u03b1 intensity ratio shows a significant rise around 6500 eV electron energy by a factor of about two above the background level. This observation is compared with calculations of the expected electron energies for the resonant K\u03b1h emission due to the KK TR process. The observed rise as a function of the electron collision energy, which occurs in the vicinity of the predicted TR resonances, is significantly stronger and energetically much wider than the results of theoretical calculations for the TR process. However, the experimental evidence of this process is not definitive.<\/jats:p>","DOI":"10.3390\/atoms11030058","type":"journal-article","created":{"date-parts":[[2023,3,16]],"date-time":"2023-03-16T03:50:45Z","timestamp":1678938645000},"page":"58","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Hypersatellite K\u03b1 Production in Trapped Ar Ions at KK Trielectronic Recombination Energies"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8257-7801","authenticated-orcid":false,"given":"Weronika","family":"Biela-Nowaczyk","sequence":"first","affiliation":[{"name":"GSI Helmholtzzentrum f\u00fcr Schwerionenforschung GmbH, 64291 Darmstadt, Germany"},{"name":"Institute of Physics, Jagiellonian University, 31-007 Krakow, Poland"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5257-6728","authenticated-orcid":false,"given":"Pedro","family":"Amaro","sequence":"additional","affiliation":[{"name":"Laboratory of Instrumentation, Biomedical Engineering and Radiation Physics (LIBPhys-UNL), Department of Physics, NOVA School of Science and Technology, NOVA University, 2829-516 Caparica, Portugal"}]},{"given":"Filipe","family":"Grilo","sequence":"additional","affiliation":[{"name":"Laboratory of Instrumentation, Biomedical Engineering and Radiation Physics (LIBPhys-UNL), Department of Physics, NOVA School of Science and Technology, NOVA University, 2829-516 Caparica, Portugal"}]},{"given":"David","family":"La Mantia","sequence":"additional","affiliation":[{"name":"Department of Physics, Western Michigan University, Kalamazoo, MI 49008, USA"}]},{"given":"John","family":"Tanis","sequence":"additional","affiliation":[{"name":"Department of Physics, Western Michigan University, Kalamazoo, MI 49008, USA"}]},{"given":"Andrzej","family":"Warczak","sequence":"additional","affiliation":[{"name":"Institute of Physics, Jagiellonian University, 31-007 Krakow, Poland"}]}],"member":"1968","published-online":{"date-parts":[[2023,3,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1558","DOI":"10.1126\/science.1084373","article-title":"Laboratory simulation of charge exchange-produced X-ray emission from comets","volume":"300","author":"Beiersdorfer","year":"2003","journal-title":"Science"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"3812","DOI":"10.1103\/PhysRevA.46.3812","article-title":"Measurement of level-specific dielectronic-recombination cross sections of heliumlike Fe xxv","volume":"46","author":"Beiersdorfer","year":"1992","journal-title":"Phys. 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