Kinetic-Energy-Release Distributions and Barrier Heights for C₂⁺ Emission from Multiply Charged C₆₀ and C₇₀ Fullerenes

Abstract

We present experimental kinetic-energy-release distributions in the asymmetric fission processes C60q+ → C58 (q-1)+ + C2+ and C70q+ → C68 (q-1)+ + C2+ for highly excited mother ions in charge states q=4-8. We find that the distributions for C70q+ are considerably narrower and peak at lower energies than for C60q+ in the corresponding charge state when q>4. Further, semiempirical values for C2+ fission barrier heights were extracted for q=4-6 by means of a statistical approach and the measured intensity ratios between fission and C2 evaporation.

Department(s)

Physics

Keywords and Phrases

Fission Reactions; Fullerenes; Kinetic Energy; Asymmetric Fissions; Barrier Heights; C70 Fullerenes; Charge States; Fission Barriers; Intensity Ratios; Lower Energies; Multiply Charged; Semiempirical Values; Statistical Approaches; Image Segmentation

International Standard Serial Number (ISSN)

1050-2947

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2008 American Physical Society (APS), All rights reserved.

Publication Date

01 Oct 2008

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