Spectrum

NIR Optical constants spectrum of beta-N2 crystal at 43 K

Title
NIR Optical constants spectrum of beta-N2 crystal at 43 K
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
Publications
Experiment type
laboratory measurement
Type
optical constants
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 4550.0 - 4850.0 0.482131412701804 0.92
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 $mm$
Resolutions
2.5 ${\pm}$ 0.5 $mm$
Comments
circular spot located in center of a monocrystal
Experiment
Near-IR Optical constants spectra of alpha and beta N2 ices at different temperatures
Date begin
1998-03-17
Release date
2018-01-31 23:51:01 UTC+0000
Version (Date)
#1 (2018-01-31 23:51:01 UTC+0000, Updated: 2019-11-02 09:18:03 UTC+0000)
History
Date Mode Version Status Comments
2017-11-17 17:16:56 UTC+0000 first import #1 valid version new beta-N2 optical constants spectrum at 43K (near-IR)
Analysis
The imaginary part 'k' of the overtone optical constants are derived from the absorption coefficient 'alpha' of Grundy et al. 1993. in the limit of small k values (k < 1e-2), i.e., with k = alpha/(4*pi*nu). The real part 'n' values is constant and equal to the visible value (n = 1.23)
Quality flag
3
Validator(s)