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MO: Molekülphysik
MO 1: Posters Monday: Clusters, Fullerenes and Nanotubes
MO 1.24: Poster
Montag, 2. April 2001, 12:30–15:00, AT3
Kinetics of formation and relaxation of hot C60+* — •Anatoli Vostrikov1,2, Dmitri Dubov1,2, and Alexei Agarkov1 — 1Institute of Thermophysics, Novosibirsk 630090, Russia — 2Novosibirsk State University, Novosibirsk 630090, Russia
The radiation of fullerene molecules from the intersection area of the C60 beam with an electron beam with an energy of Ee, eV ≤100 was studied previously [1]. It was found that ionized highly excited ions C60+* make the main contribution to the radiation [2]. In this work the kinetics of the C60+* formation and its radiative cooling were studied. Hot C60+* ions are formed upon the thermal emission of an electron. The characteristic time of the thermal electron emission is 6 µs, the formation cross-section of radiative ions C60+* is 2×10−2 nm2 at Ee = 60 eV. The radiation intensity and the temperature of C60+* as functions of the energy Ee were measured. The rate of the radiation loss of the ion energy (5.5×105 eV/s) was determined at a temperature of 3150 K. For the heat model of radiation at the wavelength λ = 540 nm, this corresponds to the emissivity ε = 1.1×10−2.
[1] A.A.Vostrikov, D.Yu.Dubov, A.A.Agarkov, JETP Lett. 63, 963 (1996).
[2] A.A.Agarkov, V.A. Galichin, S.V.Drozdov, D.Yu.Dubov, A.A.Vostrikov, Eur.Phys.D, 9, 331(1999)