Multiphoton ionization of C[sub 60]

Journal Article · Thu Mar 18 04:00:00 EST 1993 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100113a006· OSTI ID:6215222

Ding, D; Compton, R N; Haufler, R E; Klots, C E ^[1]

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1. Oak Ridge National Lab., TN (United States)

The multiphoton ionization photoelectron spectrum (MPI-PES) of C[sub 60] using pulsed lasers of nanosecond duration shows prompt electrons resulting from direct two-photon ionization, as well as a dominant low-energy delayed electron signal which follows an approximately thermal energy distribution with average energy [bar [epsilon]] = 0.30 [+-] 0.05 eV. The MPI-PES together with the mass spectrum at [lambda] = 193 nm suggests an important role of intersystem crossing from the singlet to triplet manifold of C[sub 60]. MPI at [lambda] = 193 nm is believed to result from such intersystem crossing followed by one-photon ionization of triplet C[sub 60]. Under this assumption, the photoionization cross section for C[sub 60] in the lowest triplet state is estimated to be (5.1 [+-] 2.0) [times] 10[sup [minus]17] cm[sup [minus]2]. 32 refs., 5 figs.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6215222
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 97:11; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400500* -- Photochemistry
BOSONS
CARBON
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ELEMENTARY PARTICLES
ELEMENTS
FULLERENES
IONIZATION
LASERS
MASS SPECTROSCOPY
MASSLESS PARTICLES
NONMETALS
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
PHOTONS
SPECTROSCOPY