NIR Optical constants spectrum of H2O Ih crystal at 180 K
- Title
- NIR Optical constants spectrum of H2O Ih crystal at 180 K
- DOI
- 10.26302/SSHADE/EXPERIMENT_BS_20120924_011
- Data reference
- Grundy, Will; Schmitt, Bernard (1997): NIR Optical constants spectrum of H2O Ih crystal and H2O liquid from 20 to 293 K. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20120924_011
- Publications
- Database
- Experimentalists
- Experiment type
- laboratory measurement
- Type
- optical constants
- Instrument
- Nicolet 800 – transmission Near-IR
- Sample holder
- Cooper closed cell of variable thickness (0.1, 0.3, 1, 10 mm) with MgF2 windows cooled by He cryostat in UHV chamber with 2 KBr windows
- 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 3600.0 - 10500.0 0.482131412701804 0.92 0.05 - Scan number
- 500
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
- 2.21237390820801°
- Comments
- IR beam perpendicular to C axis of H2O monocrystals
Illumination
- Type of polarization
- no
Observation
- Type of polarization
- no
- Comments
- possibly partly polarized beam by beamsplitter
- Observation mode
- single spot
- Image size
- 2.0 x 2.0 $mm$
- Resolutions
- 2.0 ${\pm}$ 0.5 $mm$
- Comments
- spot located in center of a monocrystal
- Name
- H2O crystalline ice
- Changes
- Change to Ih crystal phase
- Experiment
- NIR Optical constants spectrum of H2O Ih crystal and H2O liquid from 20 to 293 K
- Date begin
- 1998-09-28
- Release date
- 2018-01-31 23:51:01 UTC+0000
- Version (Date)
- #1 (2018-01-31 23:51:01 UTC+0000, Updated: 2018-05-01 14:11:31 UTC+0000)
- History
-
Date Mode Version Status Comments 2017-07-04 10:52:56 UTC+0000 first import #1 valid version 2012-09-24: new H2O Ih optical constants spectrum (near-IR)
- Analysis
- The imaginary part 'k' of the optical constants are derived from the absorption coefficient 'alpha' of Grundy et al. 1998. in the limit of small k values (k < 1e-2), i.e., with k = alpha/(4*pi*nu). The real part 'n' values are from Warren 1984, assuming they are temperature independent in this range (> 3650 cm-1, < 2.7 µm)
- Quality flag
- 4
- Validator(s)