FIR spectrum of an unirradiated area of the Mighei meteorite pellet

Spectrum

Title: FIR spectrum of an unirradiated area of the Mighei meteorite pellet

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Data

Unit: Range: Valid spectral range(s): 250.0 - 570.0 cm-1

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References

DOI

10.26302/SSHADE/EXPERIMENT_ZED_20230127_01

Data reference

Brunetto, Rosario; Lantz, Cateline (2022): FIR spectra of carbonaceous chondrites pellets irradiated by

H e^{+}

$He^+$ ions. SSHADE/DAYSY (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_ZED_20230127_01

Publications

Owner

Database

DAYSY

Experimentalists

Spectrum type

Experiment type: laboratory measurement
Type: normalized reflectance
Intensity unit: no unit
Reference position: 445.96 $cm^{-1}$

Instrument #1

Instrument: SMIS NEXUS 6700 - confocal reflexion Far-IR

Spectral parameters

Standard medium

vacuum

Observation mode

spectrum

Spectral range type(s)

FIR

Valid spectral range(s)

	Min - Max ( $cm^{-1}$ )	Sampling ( $cm^{-1}$ )	Resolution ( $cm^{-1}$ )	Position accuracy ( $cm^{-1}$ )	Absorption edge
#1	250.0 - 570.0		4.0	1.0

Angular parameters

Observation geometry: confocal
Observation mode: fixed angles
Incidence angle: 0.0°
Emergence angle: 0.0°
Azimuth angle: 180.0°
Phase angle: 0.0°

Spatial parameters

Observation mode: single spot
Objective type: x15
Image size: 300.0 x 300.0 ${\mu}m$
Comments: The resolution changes with the wavelength according to the Abbe's equation.

Sample

Name: Pellet of Mighei powder
Comments: Not irradiated area of the pellet

Spectrum history

Experiment

FIR spectra of carbonaceous chondrites pellets irradiated by

H e^{+}

$He^+$ ions

Date begin

2015-03-23

Release date

2023-05-25 13:55:43+0000 UTC

Version (Date)

#1 (2023-05-25 13:55:43+0000 UTC, Updated: 2023-05-25 13:55:43+0000 UTC)

History

Date	Mode	Version	Status	Comments
2023-02-08 15:28:31+0000 UTC	first import	#1	valid version	2022-05-29: First import

Spectrum analysis

Analysis

A baseline correction has been performed and then the spectrum has been normalized by adjusting the height of the maximum of the Si-O band to 1 and the band minimum (Christensen feature) to 0. Some reflectance features are present for wavenumber below 350 cm-1, they are due to non perfect compensation of athmospheric contribution.

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