MIR optical constants spectrum of crystalline C2H4 at 15K

Spectrum

Title: MIR optical constants spectrum of crystalline C2H4 at 15K

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Data

Unit: Range: Valid spectral range(s): 535.0 - 4700.0 cm-1

X Axis

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Y Axis

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References

Data reference

Trotta, Frederic; Schmitt, Bernard (1993): MIR optical constants of crystalline C2H4 at 15K. SSHADE/GhoSST (OSUG Data Center). Dataset/Spectral Data.

Publications

Trotta, 1996, 1 - 220

Owner

Database

GhoSST

Experimentalists

Spectrum type

Experiment type: laboratory measurement
Type: optical constants

Instrument #1

Instrument: Nicolet 800 – transmission Mid-IR
Sample holder: CsI window 2mm thick cooled by He cryostat in UHV chamber with 2 CsI windows 5mm thick

Spectral parameters

Standard medium

vacuum

Observation mode

spectrum

Spectral range type(s)

MIR

Valid spectral range(s)

	Min - Max ( $cm^{-1}$ )	Sampling ( $cm^{-1}$ )	Resolution ( $cm^{-1}$ )	Position accuracy ( $cm^{-1}$ )	Absorption edge
#1	535.0 - 4700.0	0.482150704812809	0.96	0.05

Scan number

100

Angular parameters

Definition: incidence and emergence angles are positive with origin at nadir. Emergence angle in transmission is larger than 90° (=180°-i).

Observation geometry: direct
Observation mode: fixed angles
Incidence angle: 0.0°
Emergence angle: 180.0°
Azimuth angle: 0.0°
Phase angle: 2.21237390820801°
Resolution illumination: 15.0°
Resolution observation: 20.0°

Polarization parameters

Illumination

Type of polarization: no

Observation

Type of polarization: no
Comments: possibly partly polarized beam by beamsplitter

Spatial parameters

Observation mode: single spot
Image size: 8.0 x 8.0 $mm$
Resolutions: 8.0 ${\pm}$ 1.0 $mm$

Sample

Name: C2H4 crystalline - dep 15K

Spectrum history

Experiment

MIR optical constants of crystalline C2H4 at 15K

Date begin

1995-12-27

Release date

2018-01-31 23:51:01+0000 UTC

Version (Date)

#1 (2018-01-31 23:51:01+0000 UTC)

History

Date	Mode	Version	Status	Comments
2017-11-17 17:16:56+0000 UTC	first import	#1	valid version	2013-02-05: new crystalline C2H4 optical constants spectrum 15K (MIR)

Spectrum analysis

Analysis

Iterative inversion of n and k with full optical model of the film+substrate + Kramers-Kronig analysis over 530-4700cm-1 range and n(15800cm-1, CH4)= 1.36 (F. Trotta thesis 1996) - k is set to 0 and n is smoothed outside C2H4 bands to reduce noise and the CO2 residual gas band (2310-2380cm-1) is removed by interpolation]

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