Charge transfer and fragmentation in cluster-atom collisions

Knospe, O.; Jellinek, Julius; Saalmann, Ulf; Schmidt, R.

doi:10.1103/physreva.61.022715

Cited by 30 publications

(26 citation statements)

References 44 publications

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“…The spectra are fitted with appropriate parametrisations to obtain the particle yield in the unmeasured p T region. The spectral shapes have also been compared with predictions from the EPOS3 model [10], which describes the full evolution of heavy ion collisions and embeds the UrQMD model for the description of the hadronic phase. This model reproduces the spectral shapes reasonably well but over-predicts the yield for central Pb-Pb collisions.…”

Section: Analysis Methods and Resultsmentioning

confidence: 99%

Probing the hadronic phase with resonances of different lifetimes in Pb-Pb collisions with ALICE

Agrawal

2018

EPJ Web Conf.

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Abstract. The ALICE experiment has measured the production of a rich set of hadronic resonances, such as ρ(770) 0 , K * (892) 0 , φ(1020), Σ ± (1385), Λ(1520) and Ξ * 0 in pp, p-Pb and Pb-Pb collisions at various energies at the LHC. A comprehensive overview and the latest results are presented in this paper. Special focus is given to the role of hadronic resonances for the study of final-state effects in high-energy collisions. In particular, the measurement of resonance production in heavy-ion collisions has the capability to provide insight into the existence of a prolonged hadronic phase after hadronisation. The observation of the suppression of the production of Λ(1520) resonance in central PbPb collisions at √ s NN =2.76 TeV adds further support to the existence of such a dense hadronic phase, as already evidenced by the ratios K * (892) 0 /K and ρ(770) 0 /π.

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Section: Analysis Methods and Resultsmentioning

confidence: 99%

Probing the hadronic phase with resonances of different lifetimes in Pb-Pb collisions with ALICE

Agrawal

2018

EPJ Web Conf.

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“…II A, only the lowest ten correlate with the separated atom asymptote: Na͑3s͒ +Na͑3s͒ +Na͑3s͒ +Na͑3s͒ +Na + ͑fully disintegrated cluster in the ground state͒. 24 are at variance with the lowest-energy isomer structure ͑planar trapezoidal structure͒ found by Knospe et al 14 The first column of Table I gives the energy position of the states at the equilibrium geometry ͑D 2d ͒ of the ground state. A few characteristics of these states that are of relevance in the discussion of the fragmentation of Na 5 + after the collision with He are given in Table I.…”

Section: B Characteristics Of the States And Of The Fragmentation Chmentioning

confidence: 77%

Theoretical investigation of nonadiabatic and internal temperature effects on the collision-induced multifragmentation dynamics of Na5+ cluster ions

Sizun

Aguillon

Sidis

2005

The Journal of Chemical Physics

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In a continued effort to disentangle adiabatic, nonadiabatic, and internal temperature effects in the collision-induced multifragmentation of alkali-metal cluster ions at moderate energies, we report a theoretical study of this process for the Na5++He encounter in the 100 eV (center-of-mass) collision energy range. The investigation makes use of a diatomics-in-molecules based nonadiabatic molecular-dynamics (NAMD) method. All of the ten electronic 1A' molecular states of the cluster that can be formed by assembling ground-state monomers are considered explicitly. Cross sections for the corresponding 12 possible fragmentation channels are determined. As in the Na4++He case, we find that a few-channel characteristic of adiabatic fragmentation in the electronic ground state dominates. This owes primarily to the dominance of impulsive adiabatic mechanisms. Nonetheless, two significant nonadiabatic transitions take place: electronic excitation during the collision and electronic deexcitation in the postcollision stage. A large amount of the electronic excitation subsequently relaxes into the electronic ground state during the postcollision stage. This important intramolecular vibrational relaxation (IVR)-type mechanism enhances the population of channels characteristic of adiabatic fragmentation in the electronic ground state. The populations of the fragmentation channels are quite sensitive to the internal cluster temperature. This is discussed in terms of the conditions of occurrence of the fragmentation mechanisms and their competition. Comparisons with experimental results are presented and discussed.

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“…[8]. It has later been applied to various collision problems: ion-fullerene collisions [9], atom-sodium cluster collisions [10], charge transfer in atom-cluster collisions [11,12], the stopping power of protons or antiprotons in clusters [13,14] or insulators [15], the excitation and ionization of molecules such as ethylene due to proton collisions [16], or the interaction of protons or heavier ions with carbon nanostructures or graphitic sheets [17,18]. It may also be used to study laser-induced molecular or cluster dynamics in the high-field (but still not relativistic) regime; some examples are Refs.…”

Section: Introductionmentioning

confidence: 99%

Scattering of a proton with the Li4 cluster: Non-adiabatic molecular dynamics description based on time-dependent density-functional theory

et al. 2012

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We have employed non-adiabatic molecular dynamics based on time-dependent density-functional theory to characterize the scattering behaviour of a proton with the Li 4 cluster. This technique assumes a classical approximation for the nuclei, effectively coupled to the quantum electronic system. This time-dependent theoretical framework accounts, by construction, for possible charge transfer and ionization processes, as well as electronic excitations, which may play a role in the non-adiabatic regime. We have varied the in- forming a LiH molecule. This theoretical formalism proves to be a powerful, effective and predictive tool for the analysis of non-adiabatic processes at the nanoscale.

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Charge transfer and fragmentation in cluster-atom collisions

Cited by 30 publications

References 44 publications

Probing the hadronic phase with resonances of different lifetimes in Pb-Pb collisions with ALICE

Probing the hadronic phase with resonances of different lifetimes in Pb-Pb collisions with ALICE

Theoretical investigation of nonadiabatic and internal temperature effects on the collision-induced multifragmentation dynamics of Na5+ cluster ions

Scattering of a proton with the Li4 cluster: Non-adiabatic molecular dynamics description based on time-dependent density-functional theory

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