{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,3]],"date-time":"2025-12-03T17:34:00Z","timestamp":1764783240574,"version":"3.41.2"},"reference-count":52,"publisher":"AIP Publishing","issue":"19","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2010,11,21]]},"abstract":"<jats:p>By means of Fabry\u2013P\u00e9rot Fourier transform microwave spectroscopy, the rotational spectrum of protonated sulfur dioxide in two distinct isomeric forms, a cis- and a trans-geometry, is reported. The search for both isomers was based on theoretical structures obtained at the CCSD(T)\/cc-pwCVQZ level of theory corrected for zero-point vibrational effects. At a similarly high level of theory, the cis-isomer is calculated to be the global minimum on the potential energy surface, but the trans-isomer is predicted to lie only a few kcal\/mol higher in energy. A total of seven lines, including a- and b-type transitions, has been observed for both isomers, and precise rotational constants have been derived. Because sulfur dioxide, SO2, is a widespread and very abundant astronomical species, and because it possesses a large proton affinity, HOSO+ is an excellent candidate for radioastronomical detection.<\/jats:p>","DOI":"10.1063\/1.3491510","type":"journal-article","created":{"date-parts":[[2010,11,19]],"date-time":"2010-11-19T14:33:35Z","timestamp":1290177215000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":22,"title":["Laboratory detection of protonated SO2 in two isomeric forms"],"prefix":"10.1063","volume":"133","author":[{"given":"Valerio","family":"Lattanzi","sequence":"first","affiliation":[{"name":"Harvard-Smithsonian Center for Astrophysics 1 , 60 Garden Street, Cambridge, Massachusetts 02138, USA and School of Engineering and Applied Science, , Cambridge, Massachusetts 02138, USA"},{"name":"Harvard University 1 , 60 Garden Street, Cambridge, Massachusetts 02138, USA and School of Engineering and Applied Science, , Cambridge, Massachusetts 02138, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patrick","family":"Thaddeus","sequence":"additional","affiliation":[{"name":"Harvard-Smithsonian Center for Astrophysics 1 , 60 Garden Street, Cambridge, Massachusetts 02138, USA and School of Engineering and Applied Science, , Cambridge, Massachusetts 02138, USA"},{"name":"Harvard University 1 , 60 Garden Street, Cambridge, Massachusetts 02138, USA and School of Engineering and Applied Science, , Cambridge, Massachusetts 02138, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael C.","family":"McCarthy","sequence":"additional","affiliation":[{"name":"Harvard-Smithsonian Center for Astrophysics 1 , 60 Garden Street, Cambridge, Massachusetts 02138, USA and School of Engineering and Applied Science, , Cambridge, Massachusetts 02138, USA"},{"name":"Harvard University 1 , 60 Garden Street, Cambridge, Massachusetts 02138, USA and School of Engineering and Applied Science, , Cambridge, Massachusetts 02138, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sven","family":"Thorwirth","sequence":"additional","affiliation":[{"name":"Universit\u00e4t zu K\u00f6ln 2 I. 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