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Two-step melting of Na(41)(+).

Authors
Type
Published Article
Journal
The Journal of Chemical Physics
1089-7690
Publisher
American Institute of Physics
Publication Date
Volume
133
Issue
15
Pages
154501–154501
Identifiers
DOI: 10.1063/1.3493375
PMID: 20969397
Source
Medline
License
Unknown

Abstract

The heat capacity of the mass selected Na(41) (+) cluster has been measured using a differential nanocalorimetry method. A two-peak structure appears in the heat capacity curve of Na(41) (+), whereas Schmidt and co-workers [M. Schmidt, J. Donges, Th. Hippler, and H. Haberland, Phys. Rev. Lett. 90, 103401 (2003)] observed, within their experimental accuracy, a smooth caloric curve. They concluded from the absence of any structure that there is a second order melting transition in Na(41) (+) with no particular feature such as premelting. The observed difference with the latter results is attributed to the better accuracy of our method owing to its differential character. The two structures in the heat capacity are ascribed to melting and premelting of Na(41) (+). The peak at lower temperature is likely due to an anti-Mackay to Mackay solid-solid transition.

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