NIR Optical constants spectrum of the $2\nu$ mode of $^{12}CO$ (normalized to 100%) in solid solution in $\beta$-$N_2$ crystal at 38 K
- Title
- NIR Optical constants spectrum of the $2\nu$ mode of $^{12}CO$ (normalized to 100%) in solid solution in $\beta$-$N_2$ crystal at 38 K
- Data reference
- Quirico, Eric; Schmitt, Bernard (1992): NIR Optical constants spectra of the $2\nu$ mode of $^{12}CO$ in solid solution in $N2$ crystal at differents temperatures. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data.
- Publications
- Database
- Experimentalists
- Experiment type
- laboratory measurement
- Type
- optical constants
- Comments
- This spectrum is only valid for the $2\nu$ 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 ($cm^{-1}$) Sampling ($cm^{-1}$) Resolution ($cm^{-1}$) Position accuracy ($cm^{-1}$) Absorption edge #1 4230.0 - 4270.0 0.482131412701804 0.92 0.05 - Comments
- data only for the $2\nu$ mode of $^{12}CO$
- 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 ${\pm}$ 0.3 $mm$
- Comments
- circular spot located in center of a monocrystal
- Experiment
- NIR Optical constants spectra of the $2\nu$ mode of $^{12}CO$ in solid solution in $N2$ crystal at differents temperatures
- Date begin
- 1998-03-17
- Release date
- 2018-02-27 11:43:15 UTC+0000
- Version (Date)
- #1 (2018-02-27 11:43:15 UTC+0000, Updated: 2018-02-08 11:09:50 UTC+0000)
- History
-
Date Mode Version Status Comments 2017-11-17 17:16:56 UTC+0000 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 $2\nu$ mode (4230-4270cm-1) of diluted $^{12}CO$, normalized to a concentration of 1, is calculated by substracting the absorbance spectrum of pure $\beta$-$N_2$ from the absorbance spectrum of the $2\nu$ mode of $^{12}CO$ diluted in $\beta$-$N_2$ (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)