Spectrum

NIR Optical constants spectrum of the 2ν mode of 12CO (normalized to 100%) in solid solution in β-N2 crystal at 38 K

Title
NIR Optical constants spectrum of the 2ν mode of 12CO (normalized to 100%) in solid solution in β-N2 crystal at 38 K
DOI
10.26302/SSHADE/EXPERIMENT_BS_20130103_004
Data reference
Quirico, Eric; Schmitt, Bernard (1992): NIR Optical constants spectra of the 2ν mode of 12CO in solid solution in N2 crystal at differents temperatures. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20130103_004
Publications
Experiment type
laboratory measurement
Type
optical constants
Comments
This spectrum is only valid for the 2ν mode (4220-4270cm-1) and for CO:beta-N2 solid solutions with CO concentrations lower than 5%
Instrument
Nicolet 800 – transmission Near-IR
Sample holder
Copper closed cell 1 mm thick with Al2O3 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 (cm1) Sampling (cm1) Resolution (cm1) Position accuracy (cm1) Absorption edge
#1 4230.0 - 4270.0 0.482131412701804 0.92 0.05
Comments
data only for the 2ν mode of 12CO
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
2.0 x 2.0 mm
Resolutions
2.0 ± 0.3 mm
Comments
circular spot located in center of a monocrystal
Experiment
NIR Optical constants spectra of the 2ν mode of 12CO in solid solution in N2 crystal at differents temperatures
Date begin
1998-03-17
Release date
2018-02-27 11:43:15+0000 UTC
Version (Date)
#1 (2018-02-27 11:43:15+0000 UTC, Updated: 2018-02-08 11:09:50+0000 UTC)
History
Date Mode Version Status Comments
2017-11-17 17:16:56+0000 UTC first import #1 valid version 2013-01-04: new optical constants spectrum of the 2nu mode of 12CO in solid solution in beta-N2 at 38K (near-IR)
Analysis
The absorption coefficient of the 2ν mode (4230-4270cm-1) of diluted 12CO, normalized to a concentration of 1, is calculated by substracting the absorbance spectrum of pure β-N2 from the absorbance spectrum of the 2ν mode of 12CO diluted in β-N2 (from Quirico and Schmitt 1997b). The band is then fitted with a lorentzian shape. The imaginary part 'k' is then derived 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 of N2 (n = 1.23). See Quirico et al. 1999
Quality flag
4
Validator(s)