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The two molecular and atomic Auger transitions are examined and assigned. The contribution of atomic Auger transitions is lower in the deuterated molecule. In addition, to support the presence of the ultrafast dissociation mechanism in the dichloromethane molecule, a series of high-level ab initio quantum mechanical calculations were performed at multiconfigurational self-consistent field (MCSCF) and multireference configuration interaction (MRCI) levels of theory. Minimum energy pathways for the dissociation of the dichloromethane molecule have been calculated by taking into account the spin-orbit splitting between the singlet and triplet transitions in the Cl 2p edge.<\/jats:p>","DOI":"10.1063\/1.5030644","type":"journal-article","created":{"date-parts":[[2018,8,2]],"date-time":"2018-08-02T17:28:33Z","timestamp":1533230913000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":18,"title":["Atomic versus molecular Auger decay in CH2Cl2 and CD2Cl2 molecules"],"prefix":"10.1063","volume":"149","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7402-6594","authenticated-orcid":false,"given":"A. C. F.","family":"Santos","sequence":"first","affiliation":[{"name":"Instituto de F\u00edsica, Universidade Federal do Rio de Janeiro 1 , 21941-972 Rio de Janeiro, RJ, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"D. 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