Phys. Rev. Lett. 89, 203401 (2002) [4 pages]Caloric Curves of Small Fragmenting ClustersReceived 26 October 2001; published 29 October 2002 The kinetic energy release distribution of neutral atoms emitted from photoexcited clusters Srn+ with n=4–15, has been obtained by time-of-flight velocity dispersion. The deduced temperature is plotted as a function of the excitation energy. For small sizes n<7 a general increase is observed. For cluster sizes larger than n=9, the deduced caloric curves first increase, and then show evidence of a plateau regime as excitation energy increases. This limiting temperature in neutral atom ejection is consistent with a bound cluster-vapor phase transition in a microcanonical system. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.203401
DOI:
10.1103/PhysRevLett.89.203401
PACS:
36.40.Ei, 36.40.Qv, 64.70.–p
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.