Experimental electron-detachment cross sections for collisions of 
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 with 
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 molecules in the energy range 50–7000 eV

Mendes, Mónica; Guerra, C.; Lozano, A.; Rojo, D. de la Peña; Oller, J.C.; Limão-Vieira, P.; Garcı́a, Gustavo

doi:10.1103/physreva.99.062709

Cited by 7 publications

(17 citation statements)

References 48 publications

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“…As to the authors' knowledge, no previous experimental or theoretical TEDCS data have been reported in the literature. If we compare these results with our recent measurements for O 2 − collisions with N 2 [17], we see that the average magnitude of the TEDCS in the common energy range (50-1000 eV) is in concordance with their respective molecular masses, i.e., 3-4 times higher for benzene than for nitrogen. In addition, the energy dependence of the TEDCSs shows some similarities for both molecular targets.…”

Section: Total Electron Detachment Cross Sectionssupporting

confidence: 71%

“…For N 2 , a prominent local maximum is shown around 200 eV (see Ref. [17]), while for benzene, two local maxima at 40 and 400 eV and a minimum around 320 eV are discernible. In contrast with nitrogen, these features are not well defined for benzene, and their respective magnitudes follow the flat tendency of the TEDCS if we consider their total uncertainty limits.…”

Section: Total Electron Detachment Cross Sectionsmentioning

confidence: 94%

“…The experimental setup used in this study was already described in detail in refs. [16,17]. Here, just a brief description with some improvements and modifications will be given.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…By tuning the extractive pulses, we could select the area of the primary beam which was really generating the positive ion fragments being mass-analysed (see refs. [16,17] for details).…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…Notwithstanding, we report on absolute total electron detachment cross sections for such collision processes in the impact energy range of 200-900 eV. Measurements were obtained with a beam attenuation technique which has been previously described [16,17]. The total uncertainty limits of these results are within 6 and 10%.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Total Electron Detachment and Induced Cationic Fragmentation Cross Sections for Superoxide Anion (O2−) Collisions with Benzene (C6H6) Molecules

Guerra

Kumar

Aguilar-Galindo

et al. 2022

IJMS

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In this study, novel experimental total electron detachment cross sections for O2− collisions with benzene molecules are reported for the impact energy range (10–1000 eV), as measured with a transmission beam apparatus. By analysing the positively charged species produced during the collision events, relative total ionisation cross sections were derived in the incident energy range of 160–900 eV. Relative partial ionisation cross sections for fragments with m/z ≤ 78 u were also given in this energy range. We also confirmed that heavier compounds (m/z > 78 u) formed for impact energies between 550 and 800 eV. In order to further our knowledge about the collision dynamics governing the fragmentation of such heavier molecular compounds, we performed molecular dynamics calculations within the framework of the Density Functional Theory (DFT). These results demonstrated that the fragmentation of these heavier compounds strongly supports the experimental evidence of m/z = 39–42, 50, 60 (u) cations formation, which contributed to the broad local maximum in the total ionisation observed from 550 to 800 eV. This work reveals the reactivity induced by molecular anions colliding with hydrocarbons at high energies, processes that can take place in the interstellar medium under various local conditions.

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Section: Total Electron Detachment Cross Sectionssupporting

confidence: 71%

Section: Total Electron Detachment Cross Sectionsmentioning

confidence: 94%

“…The experimental setup used in this study was already described in detail in refs. [16,17]. Here, just a brief description with some improvements and modifications will be given.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…By tuning the extractive pulses, we could select the area of the primary beam which was really generating the positive ion fragments being mass-analysed (see refs. [16,17] for details).…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Total Electron Detachment and Induced Cationic Fragmentation Cross Sections for Superoxide Anion (O2−) Collisions with Benzene (C6H6) Molecules

Guerra

Kumar

Aguilar-Galindo

et al. 2022

IJMS

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show abstract

Electron loss of CH− and CH2− induced by interactions with N2 and O2 at keV energies

Lira

Martinez

Escalante

et al. 2021

International Journal of Mass Spectrometry

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Unexpected benzene oxidation in collisions with superoxide anions

Guerra

Kumar

Aguilar-Galindo

et al. 2021

Sci Rep

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Superoxide anions colliding with benzene molecules at impact energies from 200 to 900 eV are reported for the first time to form massive complexes. With the aid of quantum chemistry calculations, we propose a mechanism in which a sudden double ionization of benzene and the subsequent electrostatic attraction between the dication and the anion form a stable covalently bonded C6H6O2+ molecule, that evolves towards the formation of benzene-diol conformers. These findings lend support to a model presenting a new high energy anion-driven chemistry as an alternative way to form complex molecules.

show abstract

Experimental electron-detachment cross sections for collisions of O2− with N2 molecules in the energy range 50–7000 eV

Cited by 7 publications

References 48 publications

Total Electron Detachment and Induced Cationic Fragmentation Cross Sections for Superoxide Anion (O2−) Collisions with Benzene (C6H6) Molecules

Total Electron Detachment and Induced Cationic Fragmentation Cross Sections for Superoxide Anion (O2−) Collisions with Benzene (C6H6) Molecules

Electron loss of CH− and CH2− induced by interactions with N2 and O2 at keV energies

Unexpected benzene oxidation in collisions with superoxide anions

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