https://doi.org/10.1140/epjd/e2007-00123-8
Energy distributions of clusters cooled by thermal radiation
1
Niels Bohr Institute, Ørsted Laboratory, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
2
Department of Physics, Göteborg University, 412 96 Göteborg, Sweden
Corresponding author: a klavs@physics.gu.se
Received:
21
September
2006
Revised:
3
November
2006
Published online:
24
May
2007
Particles that cool radiatively in vacuum reach a limiting energy distribution, defined by the low energy dielectric function, the heat capacity and time. We find that in a finite time, both mean temperature and the width of the distribution converge to powerlaws in time, and that the ratio of the two reach a constant value which depends on the heat capacity and the photon absorption cross section. Further, both the photon emission rate and the ratio of width to mean energy of the distribution show surprising similarities with the analogous results for cooling by particle evaporation.
PACS: 36.40.-c – Atomic and molecular clusters / 61.46.Bc – Clusters / 61.46.Df – Nanoparticles
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007
