Near-IR optical constants spectrum of crystalline CO2 ice at 179 K completed with 28K data
- Title
- Near-IR optical constants spectrum of crystalline CO2 ice at 179 K completed with 28K data
- DOI
- 10.26302/SSHADE/EXPERIMENT_BS_20130215_001
- Data reference
- Quirico, Eric; Schmitt, Bernard (2004): Near-IR optical constants of crystalline CO2 ice at 179 K completed with 28K data. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20130215_001
- Publications
- Database
- Experimentalists
- Experiment type
- laboratory measurement
- Type
- optical constants
- Comments
- composite k spectrum at 2 different temperatures (179K and 28K) and n spectrum at 15K. Waiting higher temperature thin film data!
- Instrument
- Nicolet 800 – transmission Near-IR
- Standard medium
- vacuum
- Observation mode
- spectrum
- Spectral range type(s)
- NIR
- Valid spectral range(s)
-
Min - Max ($cm^{-1}$) Sampling ($cm^{-1}$) Resolution ($cm^{-1}$) Position accuracy ($cm^{-1}$) Absorption edge #1 1850.0 - 8500.0 0.4821314 0.92 0.05
Illumination
Observation
- Comments
- possibly partly polarized beam by beamsplitter
- Observation mode
- single spot
- Image size
- 2.5 x 2.5 $mm$
- Experiment
- Near-IR optical constants of crystalline CO2 ice at 179 K completed with 28K data
- Date begin
- 2006-01-26
- Release date
- 2018-01-31 23:51:01 UTC+0000
- Version (Date)
- #1 (2018-01-31 23:51:01 UTC+0000, Updated: 2020-01-03 10:11:21 UTC+0000)
- History
-
Date Mode Version Status Comments 2017-11-17 17:16:56 UTC+0000 first import #1 valid version 2013-02-15: new CO2 optical constants spectrum at 179K (NIR)
- Analysis
- The imaginary part 'k' of the optical constants is derived from the absorption coefficients of Quirico et al. 1997a (Fig. 6). k values < $1~10^{-4}$ come from a thick crystal (1 cm) at 179 K. k > $1~10^{-4}$ (i.e. top of major bands < 5100 $cm^{-1}$) are derived from thin films at 28 K, but only small band shifts (< 4 $cm^{-1}$) relative to 179K are observed. Very weak k values < $3~10^{-8}$ between weak bands (above 5500 $cm^{-1}$) are interpolated. The real part 'n' come from mid-IR data at 15K extrapolated to the near-IR and visible (with n = 1.43 @ 15800 $cm^{-1}$)]
- Quality flag
- 3
- Validator(s)