Electronic excitations in rare gas clusters: Decay and relaxation processes probed with fluorescence spectroscopic methods

1992 ◽  
Author(s):  
M. Joppien ◽  
F. Grotelüschen ◽  
M. Lengen ◽  
R. Müller ◽  
J. Wörmer ◽  
...  
1996 ◽  
Vol 03 (01) ◽  
pp. 457-461 ◽  
Author(s):  
SAROJ K. NAYAK ◽  
R. RAMASWAMY

We study the power spectrum of fluctuations in the potential energy of atoms in small rare-gas clusters. At temperatures when the cluster is in a liquid-like state the spectra have a “1/f” dependence over a wide range of frequency f. This behavior is distinctly different from both the solid phase of clusters or bulk liquid, and is indicative of long-range temporal correlations. The origins of this phenomenon is explored by studying the individual potential-energy distributions in pure and mixed rare-gas clusters, Xe55 and ArXe54, via molecular dynamics simulations. Substitution of atomic impurities acts as an effective probe of the dynamics, and we observe that long-lived memory effects have their origins in hierarchical relaxation processes arising in the motion of the atoms from the surface to the core and vice-versa.


1997 ◽  
Vol 108 ◽  
pp. 175-185 ◽  
Author(s):  
R. von Pietrowski ◽  
M. Lengen ◽  
L. Moussavizadeh ◽  
L. Museur ◽  
A. V. Kanaev ◽  
...  

1992 ◽  
Vol 96 (5) ◽  
pp. 3624-3627 ◽  
Author(s):  
Y. Ji ◽  
M. Foltin ◽  
C. H. Liao ◽  
T. D. Märk

1980 ◽  
Vol 59 (2) ◽  
pp. 575-580
Author(s):  
P. de Muyter ◽  
B. Djafari-Rouhani ◽  
J. Vénnik

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