Threshold photodetachment of cold C−60

✍ Scribed by Lai-Sheng Wang; J. Conceicao; Changming Jin; R.E. Smalley

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 600 KB
• Volume: 182
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(91)80094-e

✦ Synopsis

Threshold photodetachment of cold Cc0 has been investigated with a tunable dye laser from 2.55 to 2.80 eV. The cold Cc0 was produced through laser vaporization of a purified Ceu target with a specially designed nozzle. The threshold behavior of the detachment cross section as a function of energy was found to be well described by Wigner's threshold law plus a dominatmg polarization term. The electron affinity of C6,, was measured to be 2.650 & 0.050 eV. Two unique effects, which are characteristic of bulk materials, were observed in this nano-sized molecule, i.e. the thermionic emission and the inelastic electron-"phonon" scattering effects, with the former strongly dependent on the laser fluences and the later on both the internal temperature of C, and the photoelectron kinetic energy.