{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,13]],"date-time":"2025-10-13T09:05:49Z","timestamp":1760346349844,"version":"3.41.2"},"reference-count":38,"publisher":"AIP Publishing","issue":"11","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2013,9,21]]},"abstract":"<jats:p>We present negative ion formation from collisions of neutral potassium atoms with D-ribose (C5H10O5), the sugar unit in the DNA\/RNA molecule. From the negative ion time-of-flight (TOF) mass spectra, OH\u2212 is the main fragment detected in the collision range 50\u2013100 eV accounting on average for 50% of the total anion yield. Prominence is also given to the rich fragmentation pattern observed with special attention to O\u2212 (16 m\/z) formation. These results are in sharp contrast to dissociative electron attachment experiments. The TOF mass spectra assignments show that these channels are also observed, albeit with a much lower relative intensity. Branching ratios of the most abundant fragment anions as a function of the collision energy are obtained, allowing to establish a rationale on the collision dynamics.<\/jats:p>","DOI":"10.1063\/1.4820949","type":"journal-article","created":{"date-parts":[[2013,9,17]],"date-time":"2013-09-17T22:13:38Z","timestamp":1379456018000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":18,"title":["Dynamic of negative ions in potassium-D-ribose collisions"],"prefix":"10.1063","volume":"139","author":[{"given":"D.","family":"Almeida","sequence":"first","affiliation":[{"name":"Universidade Nova de Lisboa 1 Laborat\u00f3rio de Colis\u00f5es At\u00f3micas e Moleculares, CEFITEC, Departamento de F\u00edsica, Faculdade de Ci\u00eancias e Tecnologia, , 2829-516 Caparica, Portugal"}]},{"given":"F.","family":"Ferreira da Silva","sequence":"additional","affiliation":[{"name":"Universidade Nova de Lisboa 1 Laborat\u00f3rio de Colis\u00f5es At\u00f3micas e Moleculares, CEFITEC, Departamento de F\u00edsica, Faculdade de Ci\u00eancias e Tecnologia, , 2829-516 Caparica, Portugal"}]},{"given":"G.","family":"Garc\u00eda","sequence":"additional","affiliation":[{"name":"Consejo Superior de Investigaciones Cient\u00edficas 2 Instituto de F\u00edsica Fundamental, , Serrano 113-bis, 28006 Madrid, Spain"},{"name":"University of Wollongong 3 Centre for Medical Radiation Physics, , NSW 2522, Australia"}]},{"given":"P.","family":"Lim\u00e3o-Vieira","sequence":"additional","affiliation":[{"name":"Universidade Nova de Lisboa 1 Laborat\u00f3rio de Colis\u00f5es At\u00f3micas e Moleculares, CEFITEC, Departamento de F\u00edsica, Faculdade de Ci\u00eancias e Tecnologia, , 2829-516 Caparica, Portugal"},{"name":"The Open University 4 Centre for Earth, Planetary, Space and Astronomical Research, Department of Physical Sciences, , Walton Hall MK7 6AA, United Kingdom"}]}],"member":"317","published-online":{"date-parts":[[2013,9,17]]},"reference":[{"key":"2023062608060448400_c1","doi-asserted-by":"publisher","first-page":"1658","DOI":"10.1126\/science.287.5458.1658","volume":"287","year":"2000","journal-title":"Science"},{"key":"2023062608060448400_c2","doi-asserted-by":"publisher","first-page":"068101","DOI":"10.1103\/PhysRevLett.93.068101","volume":"93","year":"2004","journal-title":"Phys. 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