Far-IR optical constants spectrum of H2O Ih at 133 K
- Title
- Far-IR optical constants spectrum of H2O Ih at 133 K
- DOI
- 10.26302/SSHADE/EXPERIMENT_BS_20130120_002
- Data reference
- Schmitt, Bernard; Trotta, Frederic (1995): Far-IR optical constants of crystalline H2O Ih at different temperatures between 34K and 133K. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20130120_002
- Publications
- Database
- Experimentalists
- Experiment type
- laboratory measurement
- Type
- optical constants
- Comments
- progressive deviation in n and k can occur above 400 cm-1 because Mid-IR spectrum not taken into account in KK analysis - weak unknown bands at 560 (broad), and 614 cm-1
- Instrument
- Nicolet 800 – transmission Far-IR
- Sample holder
- PE-HD window 2mm thick cooled by He cryostat in UHV chamber with 2 PE-HD windows 5mm thick
- Standard medium
- vacuum
- Observation mode
- spectrum
- Spectral range type(s)
- FIR
- Valid spectral range(s)
-
Min - Max ($cm^{-1}$) Sampling ($cm^{-1}$) Resolution ($cm^{-1}$) Position accuracy ($cm^{-1}$) Absorption edge #1 90.0 - 635.0 0.964469 1.84 0.05 - Scan number
- 100
Definition: incidence and emergence angles are positive with origin at nadir. Emergence angle in transmission is larger than 90° (=180°-i).
- 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
- Far-IR optical constants of crystalline H2O Ih at different temperatures between 34K and 133K
- Date begin
- 1995-11-12
- Release date
- 2018-01-31 23:51:01 UTC+0000
- Version (Date)
- #1 (2018-01-31 23:51:01 UTC+0000, Updated: 2020-04-29 07:16:27 UTC+0000)
- History
-
Date Mode Version Status Comments 2017-11-17 17:16:56 UTC+0000 first import #1 valid version 2013-01-20: new H2O Ih optical constants spectrum 133K (far-IR)
- Analysis
- Iterative inversion of n and k with full optical model of the film+substrate + Kramers-Kronig analysis over 100-650 cm-1 range (without using MIR data) and n(15800cm-1)= 1.31 (F. Trotta thesis 1996) - additional smoothing of k and n below 160cm-1 and extrapolation below 100 cm-1
- Quality flag
- 4
- Validator(s)