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Proceedings Paper

Dynamics of anisotropic Coulomb explosion of C60 under an intense laser field
Author(s): Junkei Kou; Vasilii Zhakhovskii; Shuji Sakabe; Katsunobu Nishihara; Seiji Shimuzu; Sakae Kawato; Masaki Hashida; Keisuke Shimuzu; Sergei V. Bulanov; Yasukazu Izawa; Yoshiaki Kato; Nobuaki Nakashima
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Paper Abstract

C60 vapor was irradiated with an intense femtosecond laser pulse. Multiply charged carbon ions, up to C4+, were detected in the time-of-flight spectra. We have measured both energy and angular distributions with respect to the laser polarization direction for ions with different charge number. The kinetic energy of ions are distributed above 1 keV. The angular distribution measurement shows that the highly charged ions of C3+ and C4+ are mostly distributed in the direction parallel to the laser polarization, and the C+ ions are slightly distributed in the direction perpendicular to it. These observations clearly indicate that an anisotropic explosion takes place. The average energy of ions with the different charge number is found to be proportional to the square of the charge number, while the maximum energy is proportional to the charge number. Classical molecular dynamics simulations have been successfully carried out reproducing not only the energy spectra but also the angular distributions of ions. The simulations suggest that the most crucial process for the anisotropic Coulomb explosion of C60 is not the electron impact ionization, but the cascade hopping of electrons.

Paper Details

Date Published: 11 January 2000
PDF: 12 pages
Proc. SPIE 3886, High-Power Lasers in Energy Engineering, (11 January 2000); doi: 10.1117/12.375149
Show Author Affiliations
Junkei Kou, Institute of Laser Engineering/Osaka Univ. (Japan)
Vasilii Zhakhovskii, Institute of Laser Engineering/Osaka Univ. (Japan)
Shuji Sakabe, Faculty of Engineering and Institute of Laser Engineering/Osaka Univ. (Japan)
Katsunobu Nishihara, Institute of Laser Engineering/Osaka Univ. (Japan)
Seiji Shimuzu, Osaka City Univ. (Japan)
Sakae Kawato, Institute of Laser Engineering/Osaka Univ. (Japan)
Masaki Hashida, Institute for Laser Technology (Japan)
Keisuke Shimuzu, Institute of Laser Engineering/Osaka Univ. (Japan)
Sergei V. Bulanov, General Physics Institute (Russia)
Yasukazu Izawa, Institute of Laser Engineering/Osaka Univ. (Japan)
Yoshiaki Kato, Japan Atomic Energy Research Institute (Japan)
Nobuaki Nakashima, Osaka City Univ. (Japan)

Published in SPIE Proceedings Vol. 3886:
High-Power Lasers in Energy Engineering
Kunioki Mima; Gerald L. Kulcinski; William J. Hogan, Editor(s)

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