Physics – Atomic and Molecular Clusters
Scientific paper
2011-01-05
J. Chem. Phys. 130, 244506 (2009)
Physics
Atomic and Molecular Clusters
Scientific paper
10.1063/1.3158359
In this paper, we study a two-dimensional model for the growth of molecular clusters in superfluid helium at low temperature. In the model, particles of diameter a follow random ballistic moves of length \delta = a-256a. Upon attachment on the cluster surface, particles allow one-step relaxation to the nearest twofold coordinated site. Average coordination numbers of particles show that in the presence of relaxation the screening for incoming particles modifies the microscopic structure of the cluster. These results are in qualitative agreement with experimental aggregation of methane in He droplets, in which large abundance of fully coordinated sites is observed. The average coordination number increases with \delta, showing that screening is relevant when relaxation is present. As the cluster size increases, the corresponding structure clusters changes from a compact to a fractal, typical of ballistic and diffusion limited models, respectively. A scaling ansatz describing the crossover between the two regimes is proposed.
Alves Sidiney G.
Ferreira Silvio C.
Vilesov Andrey F.
No associations
LandOfFree
Effects of the mean free path and relaxation in a model for the aggregation of particles in superfluid media does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Effects of the mean free path and relaxation in a model for the aggregation of particles in superfluid media, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effects of the mean free path and relaxation in a model for the aggregation of particles in superfluid media will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-398286