Kinetic-energy release and fragment distribution of exploding, highly charged<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi></mml:mrow><mml:mrow><mml:mn>60</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>molecules

Tomita, S.; Lebius, H.; Brénac, A.; Chandezon, F.; Huber, B. A.

doi:10.1103/physreva.65.053201

Cited by 25 publications

(5 citation statements)

References 37 publications

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“…The KER of an ion pair is obtained after differentiation of the distribution of the time difference between two fragments ( 51 , 52 ). SIMION simulations of the TOF spectrometer show that the ion transmission is 100% for cations with a kinetic energy up to 10 eV ( 53 ). From the relative velocity of the two fragments, one can estimate the time required to run a given distance.…”

Section: Methodsmentioning

confidence: 99%

Timing of charge migration in betaine by impact of fast atomic ions

et al. 2021

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The way molecules break after ion bombardment is intimately related to the early electron dynamics generated in the system, in particular, charge (or electron) migration. We exploit the natural positive-negative charge splitting in the zwitterionic molecule betaine to selectively induce double electron removal from its negatively charged side by impact of fast O 6+ ions. The loss of two electrons in this localized region of the molecular skeleton triggers a competition between direct Coulomb explosion and charge migration that is examined to obtain temporal information from ion-ion coincident measurements and nonadiabatic molecular dynamics calculations. We find a charge migration time, from one end of the molecule to the other, of approximately 20 to 40 femtoseconds. This migration time is longer than that observed in molecules irradiated by ultrashort light pulses and is the consequence of charge migration being driven by adiabatic nuclear dynamics in the ground state of the molecular dication.

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Section: Methodsmentioning

confidence: 99%

Timing of charge migration in betaine by impact of fast atomic ions

et al. 2021

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“…In HCI-molecule collisions, the electric field generated by the projectile is very high (typically ∼1 V Å −1 ). Previous studies on large molecules reported that some fraction of the large amount of potential energy of the highly charged projectile ions is used to release the electrons from the target molecules, rendering the molecular ion unstable and leading to fragmentation [47][48][49][50]. The initial charge state of the projectile ion and electron-capture cross-section are correlated, with the higher charge state having a larger cross-section than the lower charge state.…”

Section: Introductionmentioning

confidence: 99%

Contribution of different electron-capture mechanisms in the fragmentation of CO 2 3 +

Kumar,

Kalam Azad Siddiki,

Mukherjee

et al. 2024

New J. Phys.

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We present recoil ion - projectile ion coincidence study on the three body fragmentation of CO23+ ion into C+ + O+ + O+ fragments upon impact withAr3+, Ar6+ and Ar8+ projectile ions having the same velocity of vp = 0.49 a.u. (atomic units) using recoil ion momentum imaging technique. The kinetic energyrelease (KER) distributions are presented and effect of different electron-capture associated processes such as pure capture, electron capture followed by target ionization or projectile auto-ionization is discussed based on the analysis of KER corresponding to different final projectile charge state post collision. As the capture stabilization increased the relative yields in the KER distribution are found to decrease in the high KER side for low charged Ar3+ impact, while an increase is observed for Ar6+ and Ar8+ impacts. We discussed the interplay between electron-capture, projectile auto-ionization and target ionization for the dominance of particular process. We also observed a low-KER feature around 15 eV which was observed for electronand proton impacts, which was not yet observed for highly charged ion impacts

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“…There exists a vast amount of data on charge separation processes of cations, and some examples include multiply charged cations of CS 2 [5], CO 2 [6,7], Cl 2 O [8], CH 3 I [9], hydrated metal ions [10], fullerene ions [11][12][13], and argon clusters [14]. To our knowledge only two KER measurements have been made for dianions, IrBr 6 2− [15] and Cr(SCN) 4 2− [16].…”

Section: Introductionmentioning

confidence: 99%