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Auger electron spectroscopy exploits the Auger\u2013Meitner effect, and although it is established as an analytic technique, the theoretical modeling of molecular Auger spectra from first principles remains challenging. Here, we use coupled-cluster theory and equation-of-motion coupled-cluster theory combined with two approaches to describe the decaying nature of core-ionized states: (i) Feshbach\u2013Fano resonance theory and (ii) the method of complex basis functions. The spectra computed with these two approaches are in excellent agreement with each other and also agree well with experimental Auger spectra of benzene. The Auger spectrum of benzene features two well-resolved peaks at Auger electron energies above 260\u00a0eV, which correspond to final states with two electrons removed from the 1e1g and 3e2g highest occupied molecular orbitals. At lower Auger electron energies, the spectrum is less well resolved, and the peaks comprise multiple final states of the benzene dication. In line with theoretical considerations, singlet decay channels contribute more to the total Auger intensity than the corresponding triplet decay channels.<\/jats:p>","DOI":"10.1063\/5.0138674","type":"journal-article","created":{"date-parts":[[2023,1,18]],"date-time":"2023-01-18T10:06:35Z","timestamp":1674036395000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":27,"title":["The Auger spectrum of benzene"],"prefix":"10.1063","volume":"158","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1174-5668","authenticated-orcid":false,"given":"Nayanthara K.","family":"Jayadev","sequence":"first","affiliation":[{"name":"Department of Chemistry, University of Southern California 1 , Los Angeles, California 90089, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8426-2582","authenticated-orcid":false,"given":"Anthuan","family":"Ferino-P\u00e9rez","sequence":"additional","affiliation":[{"name":"Department of Chemistry 2 , KU Leuven, B-3001 Leuven, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5670-8057","authenticated-orcid":false,"given":"Florian","family":"Matz","sequence":"additional","affiliation":[{"name":"Department of Chemistry 2 , KU Leuven, B-3001 Leuven, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6788-5016","authenticated-orcid":false,"given":"Anna I.","family":"Krylov","sequence":"additional","affiliation":[{"name":"Department of Chemistry, University of Southern California 1 , Los Angeles, California 90089, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5919-424X","authenticated-orcid":false,"given":"Thomas-C.","family":"Jagau","sequence":"additional","affiliation":[{"name":"Department of Chemistry 2 , KU Leuven, B-3001 Leuven, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"317","published-online":{"date-parts":[[2023,2,9]]},"reference":[{"key":"2024021113483769300_c1","volume-title":"X-Ray Spectroscopy: An Introduction","year":"2013"},{"key":"2024021113483769300_c2","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1016\/0167-5729(85)90003-2","article-title":"Surface core level spectroscopy of transition metals: A new tool for the determination of their surface structure","volume":"5","year":"1985","journal-title":"Surf. 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