Fragmentation in collisions of Na<sub>9</sub><sup>+</sup>clusters with Cs atoms

Hervieux, P. A.; Zarour, B.; Hanssen, J.; Politis, M. F.; Martín, Fernando

doi:10.1088/0953-4075/34/16/310

Cited by 22 publications

(15 citation statements)

References 37 publications

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“…In the case of neutral C 2 evaporation the formalism has already been presented in Ref. [65]. Here, we extend this formalism for the description of the C + 2 fission.…”

Section: Statistical Fragmentationmentioning

confidence: 94%

“…This method has been successfully used earlier to treat charge transfer collisions between metal clusters and atoms or ions [64][65][66][67]. We first calculate the total probability P CT (b,q) for removing exactly q electrons from the fullerene (by means of charge transfer to the C 6+ ion) as a function of the impact parameter b.…”

Section: A Charge Transfer and Electronic Excitationmentioning

confidence: 99%

“…In this work we use a statistical fragmentation model based on the Weisskopf theory [69]. It is a first-order time-dependent perturbation (and statistical) approach, initially proposed to study the decay phenomena in nuclear physics and successfully employed for the treatment of metal clusters [65][66][67]70] and small carbon clusters [71,72]. Using this method we obtain an analytical form for the evaluation of the fragmentation rate constants, which reduces the computational cost with respect to molecular dynamics simulation.…”

Section: Statistical Fragmentationmentioning

confidence: 99%

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Multiple electron capture, excitation, and fragmentation inC6+−C60collisions

et al. 2014

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We present experimental and theoretical results on single-and multiple-electron capture, and fragmentation, in C 6+ + C 60 collisions at velocities in the v col = 0.05 − 0.4 a.u. range. We use time-of-flight mass spectrometry and coincidence detection of charged fragments to separate pure target ionization from processes in which the C 60 target is both ionized and fragmented. The coincidence technique allows us to identify different types of fragmentation processes such as C q+ 60 → C q+ 58 + C 2 and C q+ 60 → C (q−1)+ 58 + C + 2 . A quasimolecular approach is employed to calculate charge transfer and target excitation cross sections. First-order time-dependent perturbation and statistical methods are used to treat the postcollisional processes: the calculated rate constants for C 2 and C + 2 emission from the excited and charged fullerene are then used to evaluate the fragmentation dynamics. We show that the target ionization cross section decreases with the induced target charge state and the impact energy. C 2 emission from C q+ 60 is found to dominate when q 2 while C + 2 emission dominates when q 5, in agreement with the present and previous experimental results.

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“…In the case of neutral C 2 evaporation the formalism has already been presented in Ref. [65]. Here, we extend this formalism for the description of the C + 2 fission.…”

Section: Statistical Fragmentationmentioning

confidence: 94%

Section: A Charge Transfer and Electronic Excitationmentioning

confidence: 99%

Section: Statistical Fragmentationmentioning

confidence: 99%

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Multiple electron capture, excitation, and fragmentation inC6+−C60collisions

et al. 2014

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“…As a consequence, rigorous attempts to confront theory and experiment at a quantitative level are very scarce. One of these attempts has been the study of CT in Na 9 Cs collisions [8][9][10][11][12], for which the theory [11] has provided absolute CT cross sections in good agreement with those deduced from experiment [8].…”

mentioning

confidence: 99%

“…Thus, a direct comparison between theory and experiment is possible only for the relative intensities of the cluster fragments (the observables). As the theoretical work on Na 9 Cs [12] has shown, this comparison is not straightforward. The latter work suggests that evaporation cross sections critically depend on the initial cluster temperature T and the experimental time-of-flight (TOF) window e .…”

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confidence: 99%

Charge Transfer and Dissociation in Collisions of Metal Clusters with Atoms

et al. 2002

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We present a combined theoretical and experimental study of charge transfer and dissociation in collisions of slow Li31(2+) clusters with Cs atoms. We provide a direct quantitative comparison between theory and experiment and show that good agreement is found only when the exact experimental time of flight and initial cluster temperature are taken into account in the theoretical modeling. We demonstrate the validity of the simple physical image that consists in explaining evaporation as resulting from a collisional energy deposit due to cluster electronic excitation during charge transfer.

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