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Title: Electron attenuation in free, neutral ethane clusters

The electron effective attenuation length (EAL) in free, neutral ethane clusters has been determined at 40 eV kinetic energy by combining carbon 1s x-ray photoelectron spectroscopy and theoretical lineshape modeling. More specifically, theory is employed to form model spectra on a grid in cluster size (N) and EAL (λ), allowing N and λ to be determined by optimizing the goodness-of-fit χ{sup 2}(N, λ) between model and observed spectra. Experimentally, the clusters were produced in an adiabatic-expansion setup using helium as the driving gas, spanning a range of 100–600 molecules in mean cluster size. The effective attenuation length was determined to be 8.4 ± 1.9 Å, in good agreement with an independent estimate of 10 Å formed on the basis of molecular electron-scattering data and Monte Carlo simulations. The aggregation state of the clusters as well as the cluster temperature and its importance to the derived EAL value are discussed in some depth.
Authors:
; ;  [1] ;  [2]
  1. Department of Chemistry, University of Bergen, NO-5007 Bergen (Norway)
  2. Department of Physics and Technology, University of Bergen, NO-5007 Bergen (Norway)
Publication Date:
OSTI Identifier:
22310747
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 141; Journal Issue: 16; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AGGLOMERATION; COMPUTERIZED SIMULATION; ELECTRONS; ETHANE; GRIDS; KINETIC ENERGY; MOLECULES; MONTE CARLO METHOD; SCATTERING; SPECTRA; X-RAY PHOTOELECTRON SPECTROSCOPY