Spectrum

Mid-IR optical constants spectrum of crystalline C6H6 ice at 130K

Title
Mid-IR optical constants spectrum of crystalline C6H6 ice at 130K
DOI
10.26302/SSHADE/EXPERIMENT_BS_20170830_001
Data reference
Schmitt, Bernard; Vinatier, Sandrine; Bernard, Jean-Michel (2015): Mid-IR transmission and optical constants spectra of crystalline C6H6 at 130K. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20170830_001
Publications
Comments
spectrum not displayed in a figure
Experiment type
laboratory measurement
Type
optical constants
Comments
These optical constants are a first guess and need more thorough iterative interface reflections/interferences correction and k,n determination
Instrument
Nicolet 800 – transmission Mid-IR
Sample holder
CsI window 2mm thick cooled by He cryostat in UHV chamber with 2 CsI windows 5mm thick
Standard medium
vacuum
Observation mode
spectrum
Spectral range type(s)
MIR
Valid spectral range(s)
Min - Max ($cm^{-1}$) Sampling ($cm^{-1}$) Resolution ($cm^{-1}$) Position accuracy ($cm^{-1}$) Absorption edge
#1 400.0 - 4200.0 0.482146 0.96 0.05
Scan number
100
Observation geometry
direct
Observation mode
fixed angles
Incidence angle
0.0°
Emergence angle
180.0°
Azimuth angle
0.0°
Phase angle
180.0°
Resolution illumination
15.0°
Resolution observation
20.0°
Illumination
Observation
Comments
possibly partly polarized beam by beamsplitter
Observation mode
single spot
Image size
8.0 x 8.0 $mm$
Experiment
Mid-IR transmission and optical constants spectra of crystalline C6H6 at 130K
Parent spectrum
Date begin
2015-10-06
Release date
2018-02-24 08:23:21 UTC+0000
Version (Date)
#1 (2017-11-17 17:16:56 UTC+0000, Updated: 2020-01-02 06:22:53 UTC+0000)
History
Date Mode Version Status Comments
2017-11-17 17:16:56 UTC+0000 first import #1 valid version 2015-10-06: new crystalline C6H6 optical constants spectrum 130K (MIR)
Analysis
Polyline baseline correction of the raw absorbance spectrum of a thin film of solid C2H6 (1.65 µm thickness) trying to correct the low frequency interference fringe and the sharp spectral variations of the reflection at the thin film interfaces seen in the strong fundamental bands below 1520 $cm^{-1}$. Then 'k' calculated from the absorption coefficient derived from this corrected absorbance spectrum and 'n' determined by substractive Kramers-Kronig algorithm constrained with a visible real refactive index n = 1.54 at 632.8 nm
Quality flag
4
Validator(s)