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Absolute Cooling Rates of Freely Decaying Fullerenes

Sunden, A. E. K.; Goto, M.; Matsumoto, J.; Shiromaru, H.; Tanuma, H.; Azuma, T.; Andersen, J. U.; Canton, Sophie LU and Hansen, K. (2009) In Physical Review Letters 103(14).
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
103
issue
14
publisher
American Physical Society
external identifiers
  • wos:000270458800019
  • scopus:70349761466
ISSN
1079-7114
DOI
10.1103/PhysRevLett.103.143001
language
English
LU publication?
yes
id
64880a7a-cabf-44bb-ac7f-6a0989388663 (old id 1489362)
date added to LUP
2009-10-22 11:44:11
date last changed
2017-01-01 04:40:51
@article{64880a7a-cabf-44bb-ac7f-6a0989388663,
  abstract     = {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.},
  author       = {Sunden, A. E. K. and Goto, M. and Matsumoto, J. and Shiromaru, H. and Tanuma, H. and Azuma, T. and Andersen, J. U. and Canton, Sophie and Hansen, K.},
  issn         = {1079-7114},
  language     = {eng},
  number       = {14},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Absolute Cooling Rates of Freely Decaying Fullerenes},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.103.143001},
  volume       = {103},
  year         = {2009},
}