Spectrum

NIR Optical constants spectrum of H2O Ih crystal at 120 K

Title
NIR Optical constants spectrum of H2O Ih crystal at 120 K
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.
Publications
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 0.482131412702 0.92 0.05
Scan number
500
Observation geometry
direct
Observation mode
fixed angles
Incidence angle
0.0°
Emergence angle
180.0°
Azimuth angle
0.0°
Phase angle
2.21237390821°
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 (2017-07-04 10:52:56 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)