Formation of small lanthanum-carbide ions from laser induced fragmentation of La@C-82

Lassesson, Andreas,1976Chalmers tekniska högskola,Chalmers University of Technology (author)

The fragmentation behavior of the endohedral metallofullerene La@C-82 was studied using gas phase time-of-flight mass spectrometry. The results were compared with the fragmentation of C-60. When the metallofullerene was excited by a 337 nm ns laser, small lanthanum-carbide fragments LaCn+, n=0-6, were detected. A simple statistical maximum entropy model was used to simulate the excitation energy dependence of the loss of the LaCn+ molecules as well as C-2 evaporation to form smaller metallofullerenes. By comparing experimental ion intensities with the model, the appearance energies of LaCn+, n=0-6, were found to lie above 65 eV. The lanthanum-carbide fragments ejected from La@C-82 decrease in size with increasing internal energy. The ejection of La+ and LaC2+ is preferred at the expense of larger fragments such as LaC4+ and metallofullerenes at the higher excitation. (C) 2003 American Institute of Physics.

NATURVETENSKAP Fysik Atom- och molekylfysik och optik hsv//swe
NATURAL SCIENCES Physical Sciences Atom and Molecular Physics and Optics hsv//eng
CARBON
ENERGIES
CLUSTERS
IONIZATION
MASS-SPECTROMETRY
ENDOHEDRAL FULLERENES
DISSOCIATION
METALLOFULLERENES
ELECTRONIC-STRUCTURE
C-60
ENDOHEDRAL FULLERENES; ELECTRONIC-STRUCTURE; MASS-SPECTROMETRY; C-60; CLUSTERS; CARBON; METALLOFULLERENES; IONIZATION; DISSOCIATION; ENERGIES

Gromov, Andrei,1959Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)(Swepub:gu)xgroan (author)
Mehlig, Kirsten,1964Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)(Swepub:gu)xmehki (author)
Taninaka, A.Nagoya University (author)
Shinohara, H.Nagoya University (author)
Campbell, Eleanor E B,1960Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)(Swepub:gu)xcamel (author)
Chalmers tekniska högskolaInstitutionen för fysik (GU) (creator_code:org_t)

In:Journal of Chemical Physics: AIP Publishing119:11, s. 5591-56001089-76900021-9606

By the author/editor: Lassesson, Andre ...; Gromov, Andrei, ...; Mehlig, Kirsten, ...; Taninaka, A.; Shinohara, H.; Campbell, Eleano ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Atom and Molecul ...

By the university: Chalmers University of Technology; University of Gothenburg

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.