Electron impact ionization of C60 revisited: corrected absolute cross section functions

Foltin, V.; Foltin, M.; Matt, S.; Scheier, P.; Becker, K.; Deutsch, Hans‐Peter; Märk, T.D.

doi:10.1016/s0009-2614(98)00401-1

Cited by 44 publications

(23 citation statements)

References 27 publications

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“…Absolute total cross section for the removal of one electron from C 60 following the impact of an electron with the energy displayed on the axis. The experimental data (filled squares) are from [9,10]. The solid curve with crosses is the result of density functional theory calculations done within local-density approximation and reported in [14].…”

Section: Numerical Resultsmentioning

confidence: 99%

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Mapping the electron–electron interaction in gas phase C₆₀

Kidun¹,

Berakdar²

2006

Philosophical Magazine

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We present a theory for studying the details of the screened electron-electron interaction in fullerenes by means of the coincident electron emission upon charged particle impact. The cross sections for this process are expressed in terms of the screened electron-electron interaction and evaluated within the random-phase approximation. We performed full quantum mechanical calculations for the cross sections and obtained fair agreement with available experiments. Furthermore, we present theoretical angular and energy-resolved cross sections to underline the wealth of information that can be gained by future experiments.

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Section: Numerical Resultsmentioning

confidence: 99%

“…Currently, only integrated cross sections for the process of figure 1 have been measured [9,10], i.e. these experiments do not resolve the momenta and the spins 1,2 of the particles in the final state, but they do resolve the projectile energy and the target charge states.…”

mentioning

confidence: 99%

Mapping the electron–electron interaction in gas phase C₆₀

Kidun¹,

Berakdar²

2006

Philosophical Magazine

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“…The height of the well is determined such that the experimental value of the electron affinity of C + 60 and the number of valence electrons are correctly reproduced. A model cluster potential as derived from density functional theory (DFT) within the local density approximation [16] is [13,14]. The solid curve with crosses is the result of DFT calculations [15] whereas the dotted curve shows the present theory without RPAE.…”

Section: Resultsmentioning

confidence: 99%

“…In a series of experiments [13,14] the probability for the removal of one electron from the valence band of the carbon fullerenes (C 60 ) has been measured by bombarding it with electrons. Density functional calculations (DFT) with the local density approximation (without RPA) as well as Hartree-Fock calculations failed to reproduce the excitation probability as a function of the excitation energy [15][16][17].…”

Section: Excitations In Finite Systems: Role Of the Electron-electronmentioning

confidence: 99%

Correlation Spectroscopy of Nano‐size Materials

Kidun

Fominykh

Berakdar

2004

Correlation Spectroscopy of Surfaces, Thin Films, and Nanostructures

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“…We compare them with available experimental data [4] together with the calculation of work [5], where the bare Coulomb interaction was taken into account and the ðe; 2eÞ total cross section was calculated in the plane wave Born approximation, and with the semi-empirical model calculation [6] (see Fig. 1b).…”

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confidence: 99%

Excitation spectra of free fullerene clusters

Kidun¹,

Berakdar²

2002

Surface Science

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In this work we study the single electron emission from fullerene clusters upon the impact of low-energy electrons. The calculations of the quantum ground states of the fullerene are performed within the Hartree-Fock and the jellium shell model. The interaction between the incoming projectile and knocked out electrons is described on the basis of random phase approximation with exchange, which leads to the concept of screening of the inter-electronic interaction. We compare the results of the calculations with available experimental data for the ionization of C 60 by electron impact and show that neglect of polarization leads to results at variance with experimental finding. Ó 2002 Elsevier Science B.V. All rights reserved.Keywords: Jellium models; Many body and quasi-particle theories; Electron density, excitation spectra calculations; Electron bombardment; Electron emission; Electron-solid interactionsThe aim of this work is the investigation of the single ionization of the fullerene cluster from its (single-particle) ground state j/ 2j i upon the impact of an electron with wave vector k 0 . In the final channel two electrons recede from the residual cluster to emerge with asymptotic momenta k 1 and k 2 . The transition amplitude for such a reaction is given byE 0 is the total kinetic energy of the two electrons and P ¼ G 0 þ G 0 V P is the total Green operator of the projectile-cluster system with the total potential V. The interaction between the projectile and the knocked-out electron is designated by V 12 . Here we report on the calculation of the first-order term of Eq.(1) as well as of the next terms due to the electron-hole excitations. In the presence of the external electron with momentum k 0 the self-consistent cluster potential changes. Taking into account the polarization of the electronic cloud, we write the amplitude of the process as a sum of two terms. The ''direct'' one corresponds to the excitation of the cluster's electron labeled by index ''2'' from the jth bound state / 2j to the continuum state with the asymptotic momentum k 2 . The second ''correlation'' term describes correction, which appears from electron-hole excitations. Thus, in the random phase approximation with exchange (RPAE) the matrix element reads

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Electron impact ionization of C60 revisited: corrected absolute cross section functions

Cited by 44 publications

References 27 publications

Mapping the electron–electron interaction in gas phase C₆₀

Mapping the electron–electron interaction in gas phase C₆₀

Correlation Spectroscopy of Nano‐size Materials

Excitation spectra of free fullerene clusters

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Electron impact ionization of C60 revisited: corrected absolute cross section functions

Cited by 44 publications

References 27 publications

Mapping the electron–electron interaction in gas phase C60

Mapping the electron–electron interaction in gas phase C60

Correlation Spectroscopy of Nano‐size Materials

Excitation spectra of free fullerene clusters

Contact Info

Product

Resources

About

Mapping the electron–electron interaction in gas phase C₆₀

Mapping the electron–electron interaction in gas phase C₆₀