MIR spectrum of an irradiated area of the Murchison meteorite chip at 4 keV

Spectrum

Title: MIR spectrum of an irradiated area of the Murchison meteorite chip at 4 keV

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Data

Unit: Range: Valid spectral range(s): 800.0 - 1250.0 cm-1

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References

DOI

10.26302/SSHADE/EXPERIMENT_ZED_20240701_01

Data reference

Lantz, Cateline (2022): MIR spectra of carbonaceous chondrites irradiated by

H e^{+}

$He^+$ ions. SSHADE/DAYSY (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_ZED_20240701_01

Publications

Lantz et al., 2024, Planet. Sci. J., 0, 1 - 35

Owner

Database

DAYSY

Experimentalists

Cateline Lantz

Spectrum type

Experiment type: laboratory measurement
Type: normalized reflectance
Intensity unit: no unit
Reference position: 948.8059 $cm^{-1}$

Instrument #1

Instrument: SMIS Cary 670 - confocal reflection Mid-IR

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	800.0 - 1250.0		4.0	1.0

Angular parameters

Definition: incidence and emergence angles are positive with origin at nadir, and vary in same direction. Azimuth origin (increasing clockwise) is for i = e (opposition geometry).

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

Comments: numerical aperture of 0.62

Spatial parameters

Observation mode: averaged
Objective type: x15
Image size: 13000.0 x 13000.0 ${\mu}m$
Comments: The resolution changes with the wavelength according to the Abbe's equation.

Sample

Name: Murchison chip
Comments: Area of the pellet irradiated by $He^+$ ions at 20 keV and a total fluence of $6.10^{16} ions.cm{-2}$

Spectrum history

Experiment

MIR spectra of carbonaceous chondrites irradiated by

H e^{+}

$He^+$ ions

Date begin

2024-01-01

Release date

2025-01-22 17:12:11+0000 UTC

Version (Date)

#1 (2025-01-22 17:12:11+0000 UTC, Updated: 2025-01-28 12:51:29+0000 UTC)

History

Date	Mode	Version	Status	Comments
2024-12-17 15:12:56+0000 UTC	first import	#1	valid version	2024-07-01: 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.

Quality flag

Validator(s)

Cateline Lantz