Experiment
Title
NIR Optical constants spectrum of H2O Ih crystal and H2O liquid from 20 to 293 K
Type(s)
laboratory
Variable(s)
temperature
Instrument
Nicolet 800
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
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
Incidence angle(s)
0.0°
Emergence angle(s)
180.0°
Orientation to sample
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 $mm$
Spatial resolution
2.0 ${\pm}$ 0.5 $mm$
Comments
spot located in center of a monocrystal
Date begin - end
1997-02-14 - 1997-02-14
Publications
Comments
did not include the spectra of liquid water