Fragmentation mechanism of highly excited C70 cations in the extreme ultraviolet

Koichiro Mitsuke, Hideki Katayanagi, Junkei Kou, Takanori Mori, Yoshihiro Kubozono

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

The ion yield curves for C70-2n z+ (n = 1-8, z = 2 and 3) produced by photoionization of C70 were measured in the photon energy (hν) range of 25 - 150 eV. The appearance hv values were higher by ca. 34 eV than the thermochemical thresholds for dissociative ionization of C70 leading to C70-2nz+. Evaluation was made on the upper limits of the internal energies of the primary C70 z+ above which C70-2n+2 z+ fragments cannot escape from further dissociating into C70- 2n z++C 2. These critical internal energies agreed well with appearance internal energies of C70 z+ theoretically obtained corresponding to the threshold for the formation of C70-2n z+. The photofragmentation of the parent C70 z+ ions is considered to be governed by the mechanism of internal conversion of their electronically excited states, statistical redistribution of the excess energy among a number of vibrational modes, and sequential ejection of the C2 units.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages161-166
Number of pages6
Volume811
DOIs
Publication statusPublished - 2006
EventInternational Symposium on (e,2e), Double Photoionization and Related Topics and the 13th International Symposium on Polarization and Correlation in Electronic and Atomic Collisions - Buenos Aires, Argentina
Duration: Jul 28 2005Jul 30 2005

Other

OtherInternational Symposium on (e,2e), Double Photoionization and Related Topics and the 13th International Symposium on Polarization and Correlation in Electronic and Atomic Collisions
CountryArgentina
CityBuenos Aires
Period7/28/057/30/05

Fingerprint

internal energy
fragmentation
cations
thresholds
internal conversion
ejection
escape
photoionization
vibration mode
ions
fragments
ionization
energy
evaluation
photons
curves
excitation

Keywords

  • Binding energies
  • C
  • Fullerene ions
  • Photofragmentation
  • Reaction rate

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Mitsuke, K., Katayanagi, H., Kou, J., Mori, T., & Kubozono, Y. (2006). Fragmentation mechanism of highly excited C70 cations in the extreme ultraviolet. In AIP Conference Proceedings (Vol. 811, pp. 161-166) https://doi.org/10.1063/1.2165638

Fragmentation mechanism of highly excited C70 cations in the extreme ultraviolet. / Mitsuke, Koichiro; Katayanagi, Hideki; Kou, Junkei; Mori, Takanori; Kubozono, Yoshihiro.

AIP Conference Proceedings. Vol. 811 2006. p. 161-166.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Mitsuke, K, Katayanagi, H, Kou, J, Mori, T & Kubozono, Y 2006, Fragmentation mechanism of highly excited C70 cations in the extreme ultraviolet. in AIP Conference Proceedings. vol. 811, pp. 161-166, International Symposium on (e,2e), Double Photoionization and Related Topics and the 13th International Symposium on Polarization and Correlation in Electronic and Atomic Collisions, Buenos Aires, Argentina, 7/28/05. https://doi.org/10.1063/1.2165638
Mitsuke K, Katayanagi H, Kou J, Mori T, Kubozono Y. Fragmentation mechanism of highly excited C70 cations in the extreme ultraviolet. In AIP Conference Proceedings. Vol. 811. 2006. p. 161-166 https://doi.org/10.1063/1.2165638
Mitsuke, Koichiro ; Katayanagi, Hideki ; Kou, Junkei ; Mori, Takanori ; Kubozono, Yoshihiro. / Fragmentation mechanism of highly excited C70 cations in the extreme ultraviolet. AIP Conference Proceedings. Vol. 811 2006. pp. 161-166
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N2 - The ion yield curves for C70-2n z+ (n = 1-8, z = 2 and 3) produced by photoionization of C70 were measured in the photon energy (hν) range of 25 - 150 eV. The appearance hv values were higher by ca. 34 eV than the thermochemical thresholds for dissociative ionization of C70 leading to C70-2nz+. Evaluation was made on the upper limits of the internal energies of the primary C70 z+ above which C70-2n+2 z+ fragments cannot escape from further dissociating into C70- 2n z++C 2. These critical internal energies agreed well with appearance internal energies of C70 z+ theoretically obtained corresponding to the threshold for the formation of C70-2n z+. The photofragmentation of the parent C70 z+ ions is considered to be governed by the mechanism of internal conversion of their electronically excited states, statistical redistribution of the excess energy among a number of vibrational modes, and sequential ejection of the C2 units.

AB - The ion yield curves for C70-2n z+ (n = 1-8, z = 2 and 3) produced by photoionization of C70 were measured in the photon energy (hν) range of 25 - 150 eV. The appearance hv values were higher by ca. 34 eV than the thermochemical thresholds for dissociative ionization of C70 leading to C70-2nz+. Evaluation was made on the upper limits of the internal energies of the primary C70 z+ above which C70-2n+2 z+ fragments cannot escape from further dissociating into C70- 2n z++C 2. These critical internal energies agreed well with appearance internal energies of C70 z+ theoretically obtained corresponding to the threshold for the formation of C70-2n z+. The photofragmentation of the parent C70 z+ ions is considered to be governed by the mechanism of internal conversion of their electronically excited states, statistical redistribution of the excess energy among a number of vibrational modes, and sequential ejection of the C2 units.

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