{"title":"用三扇形质谱仪研究甲烷的亚稳双荷离子","authors":"M. Rabrenović, A.G. Brenton, J.H. Beynon","doi":"10.1016/0020-7381(83)85038-4","DOIUrl":null,"url":null,"abstract":"<div><p>A triple-sector mass spectrometer is described in which the ion beam traverses successively a magnetic sector and two electric sectors. The advantages of this arrangement in suppressing artifact peaks and in enabling fast and slow reactions of ions formed in the region between the magnetic sector and the first electric sector are described. The instrument is used to study the fragmentation of CH<sub>4</sub><sup>2+</sup> ions of low internal energy formed by charge stripping. It is shown that whilst unstable CH<sub>4</sub><sup>2+</sup> ions react to give CH<sub>2</sub><sup>2+</sup> and C<sup>2+</sup>, metastable CH<sub>4</sub><sup>2+</sup> ions give the charge separation reaction leading to CH<sub>3</sub><sup>+</sup> and H<sup>+</sup>. The lifetime of some CH<sub>4</sub><sup>2+</sup> ions formed by charge stripping of CH<sub>4</sub><sup>+·</sup> is several microseconds.</p></div>","PeriodicalId":13998,"journal":{"name":"International Journal of Mass Spectrometry and Ion Physics","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1983-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-7381(83)85038-4","citationCount":"45","resultStr":"{\"title\":\"Metastable doubly-charged ions of methane studied by means of a triple-sector mass spectrometer\",\"authors\":\"M. Rabrenović, A.G. Brenton, J.H. Beynon\",\"doi\":\"10.1016/0020-7381(83)85038-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>A triple-sector mass spectrometer is described in which the ion beam traverses successively a magnetic sector and two electric sectors. The advantages of this arrangement in suppressing artifact peaks and in enabling fast and slow reactions of ions formed in the region between the magnetic sector and the first electric sector are described. The instrument is used to study the fragmentation of CH<sub>4</sub><sup>2+</sup> ions of low internal energy formed by charge stripping. It is shown that whilst unstable CH<sub>4</sub><sup>2+</sup> ions react to give CH<sub>2</sub><sup>2+</sup> and C<sup>2+</sup>, metastable CH<sub>4</sub><sup>2+</sup> ions give the charge separation reaction leading to CH<sub>3</sub><sup>+</sup> and H<sup>+</sup>. The lifetime of some CH<sub>4</sub><sup>2+</sup> ions formed by charge stripping of CH<sub>4</sub><sup>+·</sup> is several microseconds.</p></div>\",\"PeriodicalId\":13998,\"journal\":{\"name\":\"International Journal of Mass Spectrometry and Ion Physics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1983-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0020-7381(83)85038-4\",\"citationCount\":\"45\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Mass Spectrometry and Ion Physics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0020738183850384\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Mass Spectrometry and Ion Physics","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0020738183850384","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Metastable doubly-charged ions of methane studied by means of a triple-sector mass spectrometer
A triple-sector mass spectrometer is described in which the ion beam traverses successively a magnetic sector and two electric sectors. The advantages of this arrangement in suppressing artifact peaks and in enabling fast and slow reactions of ions formed in the region between the magnetic sector and the first electric sector are described. The instrument is used to study the fragmentation of CH42+ ions of low internal energy formed by charge stripping. It is shown that whilst unstable CH42+ ions react to give CH22+ and C2+, metastable CH42+ ions give the charge separation reaction leading to CH3+ and H+. The lifetime of some CH42+ ions formed by charge stripping of CH4+· is several microseconds.
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