Document Type
Article
Publication Date
2012
Publication Source
Review of Scientific Instruments
Abstract
Helium dropletbeam methods have emerged as a versatile technique that can be used to assemble a wide variety of atomic and molecular clusters. We have developed a method to measure the binding energies of clusters assembled in helium droplets by determining the minimum droplet sizes required to assemble and detect selected clusters in the spectrum of the dopeddropletbeam. The differences in the droplet sizes required between the various multimers are then used to estimate the incremental binding energies. We have applied this method to measure the binding energies of cyclic waterclusters from the dimer to the tetramer. We obtain measured values of D0 that are in agreement with theoretical estimates to within ∼20%. Our results suggest that this threshold-based approach should be generally applicable using either mass spectrometry or optical spectroscopy techniques for detection, provided that the clusters selected for study are at least as strongly bound as those of water, and that a peak in the overall spectrum of the beam corresponding only to the cluster chosen (at least in the vicinity of the threshold) can be located.
Inclusive pages
073109-1 to 073109-5
ISBN/ISSN
0034-6748
Document Version
Published Version
Copyright
Copyright © 2012, American Institute of Physics
Publisher
American Institute of Physics
Volume
83
Peer Reviewed
yes
eCommons Citation
Lewis, William K.; Harruff-Miller, Barbara A.; Gord, Michael A.; Gord, Joseph R.; Guliants, Elena A.; and Bunker, Christopher E., "A Threshold-Based Approach to Calorimetry in Helium Droplets: Measurement of Binding Energies of Water Clusters" (2012). Electrical and Computer Engineering Faculty Publications. 152.
https://ecommons.udayton.edu/ece_fac_pub/152
Included in
Computer Engineering Commons, Electrical and Electronics Commons, Electromagnetics and Photonics Commons, Optics Commons, Other Electrical and Computer Engineering Commons, Systems and Communications Commons
Comments
This document is provided for download in compliance with the publisher's policy on self-archiving. Permission documentation is on file.