Electron-induced radiation from C60 fullerene in the gas phase

Vostrikov, A. A.; Dubov, D. Yu.; Agarkov, A. A.

doi:10.1134/1.567136

Cited by 21 publications

(12 citation statements)

References 12 publications

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“…Thermal radiation from clusters must therefore be expected to be heavily influenced by finite size effects. The subject was first investigated during the eighties and nineties, on clusters composed of carbon and of niobium, produced with both broad size and excitation energy distributions [9][10][11][12][13][14][15][16]. In these experiments, where emitted photons were detected directly, spectra resembling black-body radiation within the measured visible spectral range were observed.…”

Section: Introductionmentioning

confidence: 99%

Radiative cooling of size-selected gas phase clusters

Ferrari

Janssens

Lievens

et al. 2019

International Reviews in Physical Chemistry

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Predicted almost forty years ago, the radiation from thermally populated excited electronic states has recently been recognized as an important cooling mechanism in free molecules and clusters. It has presently been observed from both inorganic clusters and carbon-based molecules in molecular beams and ion storage devices. Experiments have demonstrated that many of these systems radiate at rates approaching microsecond time scales, and often with a distinct dependence on the precise number of atoms in the system. The radiation acts as a strongly stabilizing factor against both unimolecular decay and thermal electron emission. In astrophysical context, radiative cooling provides a mechanism to dissipate internal energy in star-forming processes, and stabilizes molecules selectively in the circumstellar medium. The consequences of an active radiative cooling channel for nanoparticle production will likewise favor special sizes in nonequilibrium formation processes. In this review, the radiative cooling of clusters is presented and illustrated with examples of experiments performed on small carbon, metal, and semiconductor clusters, and on PAH molecules. The experimental and theoretical techniques used are discussed, together with the consequences of radiative cooling on size-to-size stability patterns of clusters.

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Section: Introductionmentioning

confidence: 99%

Radiative cooling of size-selected gas phase clusters

Ferrari

Janssens

Lievens

et al. 2019

International Reviews in Physical Chemistry

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“…The intermediate situation, where both unimolecular decays and thermal radiation occur and compete, has been described and used on a number of occasions, in single pass molecular beam devices [18][19][20][21][22][23][24][25] and also to an increasing extent in storage rings and ion trap experiments, see e.g. Refs.…”

Section: Introductionmentioning

confidence: 99%

Influence of thermal radiation on hot cluster decay rates and abundances

Hansen

Ferrari

2019

Chinese Journal of Chemical Physics

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The influence of radiative cooling on the unimolecular decay rates of free, hot clusters and molecules with unspecified excitation energies is quantified. Two different regimes, defined by the magnitude of the energy of the photons emitted, are identified and the boundary between them is given. The boundary is determined in terms of the photon emission rate constants and thermal properties of the particles. Also the abundance spectra are calculated for the continuous cooling case, corresponding to small photon energies. The two regimes correspond to continuous cooling and single photon quenching of the unimolecular decay. The radiative effect can be parametrized by a redefinition of the time each individual cluster has available to undergo evaporation, expressed by an effective radiative time constant.

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“…The results of [6][7][8] and this work indicate that the way of excitation does not influence the emission spectra of the clusters. We established that the emission is associated mainly with charged clusters of C + 60 .…”

Section: Introductionmentioning

confidence: 53%

“…As for strongly bound clusters (such as clusters of refractory substances), their radiative cooling occurs with a continuous black-body-like spectrum observed for clusters of (Nb) n [6] (n ≈ 260, radiative temperature is up to 3200 K), and for C 60 [7,8]. In [7], C 60 clusters were evaporated from the solid phase into vacuum by laser radiation, and the thermal emission spectrum in the region of 360-750 nm was observed.…”

Section: Introductionmentioning

confidence: 99%

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Radiative cooling of C60 and C60+ in a beam

Vostrikov

Dubov

Agarkov

et al. 1999

The European Physical Journal D

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We observed a continuous emission spectrum of C * 60 and C + * 60 clusters induced by electron impact for wavelengths 300 to 800 nm (the monochromator's resolution was ∆λ = 3.2 nm). The emission spectrum was described by a modified Planck's formula for the black-body-like radiation. The radiative temperature of clusters, T , (up to 3100 K) and the integral intensity of emission depend on the electron energy Ee in a beam. The intensity of emission from C + 60 is higher than that from a neutral cluster. The emissivity coefficient has been found to be ε(C + * 60 ) = 7.6 × 10 −3 .PACS. 34.80.Gs Molecular excitation and ionization by electron impact -61.48.+c Fullerenes and fullerene-related materials -78.60.-b Other luminescence and radiative recombination

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Electron-induced radiation from C60 fullerene in the gas phase

Cited by 21 publications

References 12 publications

Radiative cooling of size-selected gas phase clusters

Radiative cooling of size-selected gas phase clusters

Influence of thermal radiation on hot cluster decay rates and abundances

Radiative cooling of C60 and C60+ in a beam

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