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The absolute total electron detachment, relative total, and partial ionization cross sections have been measured within this energy range together with the positive ion yields. The primary anionic beam projectile is produced in a pulsed hollow cathode discharge induced plasma, and its interactions with the neutral molecular target occur in a gas cell at a well-known constant pressure. For impact energies above 500\u00a0eV, high mass (m &amp;gt; 44 u) charged complexes have been detected. With the aid of a theoretical study using ab\u00a0initio methods, we propose a mechanism to infer the formation of these cationic species, which have been assigned to projectile\u2013target stable compounds (CO3+ and CO4+).<\/jats:p>","DOI":"10.1063\/5.0242954","type":"journal-article","created":{"date-parts":[[2025,2,3]],"date-time":"2025-02-03T11:22:26Z","timestamp":1738581746000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":1,"title":["Superoxide anion (O2\u2212) collisions with CO2 molecules in the energy range of 50\u2013950 eV"],"prefix":"10.1063","volume":"162","author":[{"given":"C.","family":"Guerra","sequence":"first","affiliation":[{"name":"Instituto de F\u00edsica Fundamental, Consejo Superior de Investigaciones Cient\u00edficas 1 , Serrano 113-bis, 28006 Madrid,","place":["Spain"]}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-2082-6891","authenticated-orcid":false,"given":"M.","family":"Leiferman","sequence":"additional","affiliation":[{"name":"Departamento de Qu\u00edmica, M\u00f3dulo 13, Universidad Aut\u00f3noma de Madrid 2 , 28049 Madrid,","place":["Spain"]}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4613-0372","authenticated-orcid":false,"given":"A. 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