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Journal Articles

Effect of ion irradiation on C$$_{60}$$ thin films

Narumi, Kazumasa; Xu, Y.; Miyashita, Kiyoshi*; Naramoto, Hiroshi

European Physical Journal D, 24(1-3), p.385 - 388, 2003/06

 Times Cited Count:4 Percentile:22.96(Optics)

The structural changes have been investigated in C$$_{60}$$ thin films irradiated with 7-MeV $$^{12}$$C$$^{2+}$$ ions using Raman spectroscopy. First, irradiated C$$_{60}$$ thin films show resistance to photopolymerization. The extent of the resistance increases with increasing fluence of ion irradiation. The effect is qualitatively explained by the fact that the photochemical reaction is suppressed by destructive collisions of the C$$_{60}$$ molecules with the energetic ions followed by lattice damage. Secondly, no intermediate fragments of a C$$_{60}$$ molecule generated by ion impact are observed, ${it i.e.}$, each C$$_{60}$$ molecule completely decomposes into its constituent atoms in a single catastrophic event upon energetic-ion impact. An effective cross section for decomposition of the C$$_{60}$$ molecule is derived from dependence of the peak-intensity ratio of ${it A}$$$_{g}$$(2) as $$sigma$$ = 5.1$$times$$10$$^{-15}$$ cm$$^{2}$$.

Journal Articles

Modification of C$$_{60}$$ thin films by ion 7-MeV $$^{12}$$C$$^{2+}$$ ion irradiation

Narumi, Kazumasa; Xu, Y.; Miyashita, Kiyoshi*; Naramoto, Hiroshi

JAERI-Review 2002-035, TIARA Annual Report 2001, p.176 - 178, 2002/11

no abstracts in English

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