Du är här

Absolute Cooling Rates of Freely Decaying Fullerenes

Författare:
  • A. E. K. Sunden
  • M. Goto
  • J. Matsumoto
  • H. Shiromaru
  • H. Tanuma
  • T. Azuma
  • J. U. Andersen
  • Sophie Canton
  • K. Hansen
Publiceringsår: 2009
Språk: Engelska
Publikation/Tidskrift/Serie: Physical Review Letters
Volym: 103
Nummer: 14
Dokumenttyp: Artikel
Förlag: American Physical Society

Sammanfattning

The cooling rates of C-60(-) have been measured in an electrostatic storage ring between several hundred mu s and several tens of ms with one-photon laser excitation. The absolute energy scale is established by the photon energy, and the cooling time interval is derived from the nonexponential decay of the ensemble of hot molecules. The energy decreases due to the combined action of depletion and thermal emission of IR photons with a total energy loss rate that varies inversely proportional to time, 0.9 eV/t. The radiative component decreases from a few hundred eV/s at submillisecond time scales to several tens of eV/s at 20 ms and confirms that the crossover from depletion to predominantly radiative cooling occurs around 5 ms. The method is applicable to any large molecule or cluster which decays spontaneously, irrespective of the specific decay channel.

Disputation

Nyckelord

  • Chemistry

Övrigt

Published
Yes
  • ISSN: 0031-9007

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen

LERU logo U21 logo