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Simulation of keV clusters incident on gold targets

Childs, A. M. and Shapiro, M. H. and Tombrello, T. A. (1998) Simulation of keV clusters incident on gold targets. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 143 (3). pp. 298-305. ISSN 0168-583X. http://resolver.caltech.edu/CaltechAUTHORS:20141028-090424368

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Abstract

Using molecular dynamics (MD) simulations, Shapiro and Tombrello predicted that keV clusters containing a mixture of light and heavy atoms can eject a substantial fraction of their lighter atoms away from a target surface, a phenomenon they designate “splash”. Recently, experiments by Diehnelt et al. and Brunelle et al. have shown evidence of fluorine and deuterium splash in systems of (NaF)nNa+ and deuterated valine, respectively, incident on gold targets. Although direct yields cannot be compared due to unknown ionization efficiencies in the experiments, this paper describes further simulations which provide insight into the experimental systems. For the (NaF)_(n)Na^+ clusters, our results agree reasonably well with the observed trend in fluorine splash as a function of cluster energy but predict a different dependence on cluster size. For the valine system, we find the same dependence of the yield on cluster size as the experiment.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/S0168-583X(98)00368-1DOIArticle
http://www.sciencedirect.com/science/article/pii/S0168583X98003681PublisherArticle
Additional Information:© 1998 Elsevier B.V. Received 17 April 1998. We would like to thank the California Institute of Technology for supporting the Physics 11 program which allowed A.M. Childs to participate in this project. This work was supported in part by the National Science Foundation (Grants DMR97-30839 and DMR93-12468).
Funders:
Funding AgencyGrant Number
NSFDMR97-30839
NSFDMR93-12468
Classification Code:PACS: 31.13.Qg; 34.50.Dy; 36.40.Sx
Record Number:CaltechAUTHORS:20141028-090424368
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141028-090424368
Official Citation:Childs, A. M., Shapiro, M. H., & Tombrello, T. A. (1998). Simulation of keV clusters incident on gold targets. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 143(3), 298-305. doi: http://dx.doi.org/10.1016/S0168-583X(98)00368-1
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50911
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:28 Oct 2014 18:49
Last Modified:28 Oct 2014 18:49

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