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Both are intermediates in combustion processes and play a role in the removal of nitrogen oxides from exhaust gases. The rovibronic structure of the first band in the TPES of HNCO+ was analyzed within the framework of an orbital ionization model, and the resolved structure of the origin band was assigned to \u0394K subbands. An ionization energy of 11.602 \u00b1 0.005 eV was determined and the vibrational structure of the cationic ground state was analyzed by a Franck-Condon fit. Low lying electronically excited states of HNCO+ were also observed. In a second series of experiments, the NCO radical was generated by flash pyrolysis from chlorine isocyanate. The ionization energy to the X+\u20083\u03a3\u2212 ground state was determined to be 11.76 \u00b1 0.02 eV, while for the a+\u20081\u0394 state, a value of 12.93 \u00b1 0.02 eV was obtained. Vibrational structure was observed for both states, and bands were assigned by Franck-Condon simulations.<\/jats:p>","DOI":"10.1063\/1.4920951","type":"journal-article","created":{"date-parts":[[2015,5,13]],"date-time":"2015-05-13T17:41:47Z","timestamp":1431538907000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":13,"title":["Threshold photoelectron spectroscopy of unstable N-containing compounds: Resolution of \u0394K subbands in HNCO+ and vibrational resolution in NCO+"],"prefix":"10.1063","volume":"142","author":[{"given":"Fabian","family":"Holzmeier","sequence":"first","affiliation":[{"name":"University of W\u00fcrzburg 1 Institute of Physical and Theoretical Chemistry, , Am Hubland, D-97074 W\u00fcrzburg, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Melanie","family":"Lang","sequence":"additional","affiliation":[{"name":"University of W\u00fcrzburg 1 Institute of Physical and Theoretical Chemistry, , Am Hubland, D-97074 W\u00fcrzburg, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ingo","family":"Fischer","sequence":"additional","affiliation":[{"name":"University of W\u00fcrzburg 1 Institute of Physical and Theoretical Chemistry, , Am Hubland, D-97074 W\u00fcrzburg, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaofeng","family":"Tang","sequence":"additional","affiliation":[{"name":"l\u2019Orme des Merisiers 2 Synchrotron SOLEIL, , Saint Aubin BP 48, F-91192 Gif sur Yvette Cedex, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Barbara","family":"Cunha de Miranda","sequence":"additional","affiliation":[{"name":"UMR 8000 CNRS and Universit\u00e9 Paris-Sud 11 3 Laboratoire de Chimie-Physique, , F-91405 Orsay Cedex, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Claire","family":"Romanzin","sequence":"additional","affiliation":[{"name":"UMR 8000 CNRS and Universit\u00e9 Paris-Sud 11 3 Laboratoire de Chimie-Physique, , F-91405 Orsay Cedex, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6816-4664","authenticated-orcid":false,"given":"Christian","family":"Alcaraz","sequence":"additional","affiliation":[{"name":"UMR 8000 CNRS and Universit\u00e9 Paris-Sud 11 3 Laboratoire de Chimie-Physique, , F-91405 Orsay Cedex, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patrick","family":"Hemberger","sequence":"additional","affiliation":[{"name":"Paul Scherrer Institute (PSI) 4 Molecular Dynamics Group, , CH-5232 Villigen, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"317","published-online":{"date-parts":[[2015,5,13]]},"reference":[{"key":"2023062609354946000_c1","doi-asserted-by":"publisher","first-page":"3572","DOI":"10.1002\/anie.200905335","volume":"49","year":"2010","journal-title":"Angew. 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