1. The Application of Ultraviolet/Visible Spectroscopy to the Study of Surface Astrochemistry
James W. Stubbing, Tara L. Salter, Wendy A. Brown, Skandar Taj and Martin R. S. McCoustra

2. Introduction Simulate conditions of the ISM
T ≈ 24 K
p ≤ 2.0 × mbar
Adsorb molecules onto surfaces
HOPG
Silica
Interstellar processing of ices
Thermal
Bombardment
Irradiation
Spectroscopically
RAIRS

3. New UV/vis Setup

4. Determine values of n and k
Why?
Determine values of n and k

5. How? Determined values of n and k iterate
Fit using Fresnel equations and Kramers-Kronig relation
Compare simulated spectrum to experiment
Measure reflectance
Model R’
Determined values of n and k
θ, ν, d R R’
θ, ν, d
θ, ν, d R
θ, ν, d
iterate