Experiment
Title
Near-IR Optical constants spectra of alpha and beta N2 ices at different temperatures
DOI
10.26302/SSHADE/EXPERIMENT_BS_20120925_001
Data reference
Quirico, Eric; Schmitt, Bernard; Grundy, Will (1992): Near-IR Optical constants spectra of alpha and beta N2 ices at different temperatures. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20120925_001
Type(s)
laboratory measurement
Description
Near-IR Optical constants spectra of alpha and beta N2 ices in the 33 K - 43 K range. A change of solid phases is observed at 35.6 K between alpha and beta phases
Variable(s)
temperature, sample phase
Number of spectra
6
Instrument
Nicolet 800 – transmission Near-IR
Sample holder
Cooper closed cell 10 mm thick 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 2000.0 - 5000.0 0.4821314 0.92 0.05
Comments
only overtone bands range measured except for spectrum at 36.5K (fundamental and overtone bands measured in 2 separate spectral ranges)
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
25.0°
Comments
crystals C axis possibly mostly perpendicular to beam axis
Illumination
Type of polarization
no
Observation
Type of polarization
no
Comments
possibly partly polarized beam by beamsplitter
Observation mode
single spot
Image size
2.5 x 2.5 $mm$
Spatial resolution
2.5 ${\pm}$ 0.5 $mm$
Comments
circular spot located in center of a monocrystal
Variable type(s)
  • temperature
  • sample phase
Date begin
1992-01-01

Versions

Release date
2018-01-31 23:51:01 UTC+0000
Version (Date)
#1 (2017-11-17 17:16:56 UTC+0000, Updated: 2019-11-02 09:18:03 UTC+0000)