Laser spectroscopy of the O2+molecular ion using a fast ion beam: Fine structure and predissociation lifetimes in theb4Σg-state

Carré, Michel; Druetta, M.; Gaillard, M.L.; Bukow, H.H.; Horani, M.; Roche, A. L.; Velghe, M.

doi:10.1080/00268978000102411

Cited by 48 publications

(9 citation statements)

References 42 publications

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“…Pure molecular hydrogen is ionized in a standard rf-gas discharge source (80 MHz) typically operated at 30 W with an H 2 pressure of 1 Pa. Beams of singly charged ions extracted from this gas discharge ion source are accelerated to energies between 20 and 150 keV with a resolution ( E/E) of 0.01. The accelerator system was described in detail elsewhere [11]. A first magnetic sector field is used to separate protons from H + 2 , H + 3 , hydrogen cluster ions, and other ions originating from impurities in the source.…”

Section: Methodsmentioning

confidence: 99%

20–150-keV proton-impact-induced ionization of uracil: Fragmentation ratios and branching ratios for electron capture and direct ionization

et al. 2010

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Fragmentation ratios and branching ratios are measured for ionization and dissociative ionization for 20-150 keV (0.9-2.4v 0 ) proton collisions with gas-phase uracil molecules. Through event-by-event determination of the postcollision projectile charge, it is possible for such a key biomolecule to distinguish between electron capture (EC) by the incident proton and direct ionization (DI) without projectile neutralization. While the same fragment ion groups are observed in the mass spectra for both processes, EC induces dissociation with greater efficiency than DI in the impact energy range of 35-150 keV (1.2-2.4v 0 ). In this range EC is also less abundant than DI with a branching ratio for EC/total ionization of <50%. Moreover, whereas fragmentation ratios do not change with energy in the case of EC, DI mass spectra show a tendency for increased fragmentation at lower impact energies.

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Section: Methodsmentioning

confidence: 99%

20–150-keV proton-impact-induced ionization of uracil: Fragmentation ratios and branching ratios for electron capture and direct ionization

et al. 2010

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“…Beams of singly charged ions are accelerated to energies between 20 and 150 keV with a resolution ⌬E / E of 0.01. The accelerator system is described in detail by Carré et al [22]. A magnetic sector field is used to separate protons from other ions such as H 2 + ,H 3 + , and ions originating from impurities in the source.…”

Section: Methodsmentioning

confidence: 99%

Ionization of water by (20–150)-keV protons: Separation of direct-ionization and electron-capture processes

et al. 2004

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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“…It consists basically of five parts (from left to right): first, a proton ion source based on a standard rf discharge burning in H 2 [17]. Second, the ion accelerator allowing us to produce 20-150 keV protons with an energy resolution DE͞E of 0.01 [17]. Third, a sector-field type magnetic mass selector for purification of the projectile ion beam.…”

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confidence: 99%

Total, Partial, and Electron-Capture Cross Sections for Ionization of Water Vapor by 20–150 keV Protons

Gobet

Farizon

et al. 2001

Phys. Rev. Lett.

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Laser spectroscopy of the O₂⁺molecular ion using a fast ion beam: Fine structure and predissociation lifetimes in theb⁴Σ_g^-state

Cited by 48 publications

References 42 publications

20–150-keV proton-impact-induced ionization of uracil: Fragmentation ratios and branching ratios for electron capture and direct ionization

20–150-keV proton-impact-induced ionization of uracil: Fragmentation ratios and branching ratios for electron capture and direct ionization

Ionization of water by (20–150)-keV protons: Separation of direct-ionization and electron-capture processes

Total, Partial, and Electron-Capture Cross Sections for Ionization of Water Vapor by 20–150 keV Protons

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