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 TVT, 2001, Volume 39, Issue 1, Pages 26–34 (Mi tvt1849)

Plasma Investigations

Inelastic interaction of an electron with a $\mathrm{C}_{60}$ cluster

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

Institute of Thermophysics, Siberian Division of the Russian Academy of Sciences, Novosibirsk

Abstract: The method of intersecting beams of $\mathrm{C}_{60}$ fullerene clusters and of electrons is used to investigate the production of $\mathrm{C}_{60}^+$ and $\mathrm{C}_{60}^-$ ions and the radiation in the wavelength range from $300$ to $800$ nm for the electron energy $E_e$ ranging from zero to $100$ eV. The absolute values of the ionization and electron-attachment cross sections [$\sigma^+(E_e )$ and $\sigma^-(E_e)$, respectively] are determined. A maximum of $\sigma^+(E_e)$ of 0.53 nm$^2$ is observed at $E_e=52$ eV. For a $\mathrm{C}_{60}$ cluster excited by electron impact, "delayed" ($\sim­150 \mu$s) ionization initiated by collision with the surface and ionization due to thermionic emission (its characteristic time at $E_e=60$ eV is $6\mu$s) is observed. It is found that, for $E_e < 0.4$ eV, the formation of $\mathrm{C}_{60}^-$ is defined by the polarization capture of an $s$-electron ($\sigma^-\sim E^{-1}_e$), and a formula is suggested for determining $\sigma^-(E_e)$. In the region of $E_e$ from $1$ to $6$ eV, the cross section $\sigma^-(E_e)$ shows only slight variations about $\sigma^-(E_e)=0.36\pm 0.03$ nm$^2$. For $E_e>7.5$ eV, $\mathrm{C}_{60}^-$ ions proved to be unstable to electron autodetachment. In the region of intersection of $\mathrm{C}_{60}$ and electron beams, radiation of a quasicontinuous spectrum described by a modified Planck formula for the thermal emission of spherical particles of diameter $d\ll\lambda$ is recorded. For $E_e>47$ eV, the brightness temperature proved to be $3150\pm50$ K. It is found that this radiation is emitted predominantly by hot $\mathrm{C}_{60}^{+*}$ ions produced as a result of thermionic emission from $\mathrm{C}_{60}^*$. The rate of radiation loss of energy by a $\mathrm{C}_{60}^{+*}$ ion and the cross section for the formation of radiating $\mathrm{C}_{60}^{+*}$ ions are found to be, respectively, $5.5\times 105$ eV/s at $T=3150$ K and $2\times10^{-2}$ nm$^2$ at $E_e=60$ eV.

Full text: PDF file (1832 kB)

English version:
High Temperature, 2001, 39:1, 22–30

UDC: 539.19.541.5

Citation: A. A. Vostrikov, D. Yu. Dubov, A. A. Agarkov, “Inelastic interaction of an electron with a $\mathrm{C}_{60}$ cluster”, TVT, 39:1 (2001), 26–34; High Temperature, 39:1 (2001), 22–30

Citation in format AMSBIB
\Bibitem{VosDubAga01} \by A.~A.~Vostrikov, D.~Yu.~Dubov, A.~A.~Agarkov \paper Inelastic interaction of an electron with a $\mathrm{C}_{60}$ cluster \jour TVT \yr 2001 \vol 39 \issue 1 \pages 26--34 \mathnet{http://mi.mathnet.ru/tvt1849} \transl \jour High Temperature \yr 2001 \vol 39 \issue 1 \pages 22--30 \crossref{https://doi.org/10.1023/A:1004158127791} 

• http://mi.mathnet.ru/eng/tvt1849
• http://mi.mathnet.ru/eng/tvt/v39/i1/p26

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This publication is cited in the following articles:
1. G. N. Makarov, “Extreme processes in clusters impacting on a solid surface”, Phys. Usp., 49:2 (2006), 117–166
2. JETP Letters, 86:7 (2007), 454–457
3. G. N. Makarov, “Cluster temperature. Methods for its measurement and stabilization”, Phys. Usp., 51:4 (2008), 319–353
4. G. N. Makarov, “Experimental methods for determining the melting temperature and the heat of melting of clusters and nanoparticles”, Phys. Usp., 53:2 (2010), 179–198
5. G. N. Makarov, “Kinetic methods for measuring the temperature of clusters and nanoparticles in molecular beams”, Phys. Usp., 54:4 (2011), 351–370
6. Zeegers G.P., Guenthardt B.F., Zenobi R., “Target Plate Material Influence on Fullerene-C-60 Laser Desorption/Ionization Efficiency”, J. Am. Soc. Mass Spectrom., 27:4 (2016), 699–708