Averaged Raman spectrum of Murchison pellet n°2 irradiated (He^+, fluence 3 10^16 ions.cm^-2) | DAYSY

Spectrum

Averaged Raman spectrum of Murchison pellet n°2 irradiated ( $He^+$ , fluence $3~10^{16}$ ions. $cm^{-2}$ )

Title: Averaged Raman spectrum of Murchison pellet n°2 irradiated ( $He^+$ , fluence $3~10^{16}$ ions. $cm^{-2}$ )

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Data

Unit: Range: Valid spectral range(s): 902.0 - 1798.0 cm-1

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References

DOI

10.26302/SSHADE/EXPERIMENT_RB_20130101_002

Data reference

Brunetto, Rosario (2013): Ion irradiation (

H e^{+}

$He^+$ ,

A r^{+}

$Ar^+$ ) of a Murchison meteorite pellets probed by Raman spectroscopy. SSHADE/DAYSY (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_RB_20130101_002

Publications

Lantz et al., 2015, Astron. Astrophys., 577, A41

Owner

Database

DAYSY

Experimentalists

Rosario Brunetto

Spectrum type

Experiment type: laboratory measurement
Type: Raman scattering intensity
Intensity unit: AU
Comments: Thickness of the meteorite pellet is large enough (>200 µm) to avoid contribution of KBr to the spectra.

Instrument #1

Instrument: Thermo DXR - Raman
Sample holder: samples mounted horizontally on X-Y stage of microscope

Spectral parameters

Standard medium

vacuum

Observation mode

spectrum

Spectral range type(s)

MIR

Excitation wavelength

532 nm

Valid spectral range(s)

	Min - Max ( $cm^{-1}$ )	Sampling ( $cm^{-1}$ )	Resolution ( $cm^{-1}$ )	Position accuracy ( $cm^{-1}$ )	Absorption edge
#1	902.0 - 1798.0	0.964	4.0	1.0

Comments

Raman shift with respect to laser at 532 nm

Angular parameters

Comments: Confocal measurement with a x50 objective at long working distance

Spatial parameters

Observation mode: averaged
Spots number: 50
Objective type: x50
Image size: 1.0 x 1.0 ${\mu}m$
Comments: We recorded Raman maps of the different areas (virgin and irradiated) on the pellets to better cope with surface heterogeneity issues

Sample

Name

Pellet of Murchison powder (n°2)

Comments

Area D, irradiated with

3 10^{16}

$3~10^{16}$

H e^{+}

$He^+$

c m^{- 2}

$cm^{-2}$

Primary constituent(s)

matrix Murchison

Spectrum history

Experiment

Ion irradiation (

H e^{+}

$He^+$ ,

A r^{+}

$Ar^+$ ) of a Murchison meteorite pellets probed by Raman spectroscopy

Date begin

2013-12-31

Release date

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

Version (Date)

#1 (2018-01-31 23:51:01+0000 UTC, Updated: 2018-09-27 16:05:43+0000 UTC)

History

Date	Mode	Version	Status	Comments
2017-07-26 11:45:30+0000 UTC	first import	#1	valid version	2017-07-26: First import

Spectrum analysis

Analysis: Selected spectrum of the $3~10^{16}$ $He^+$ . $cm^{-2}$ irradiated area, showing the most disordered (most irradiated) polyaromatic carbon (large D and G bands), thus representative of the irradiated layer (see Lantz et al., 2015, for details).
Quality flag: 4

Averaged Raman spectrum of Murchison pellet n°2 irradiated (He+He^+, fluence 3 10163~10^{16} ions.cm−2cm^{-2})

Averaged Raman spectrum of Murchison pellet n°2 irradiated ( $He^+$ , fluence $3~10^{16}$ ions. $cm^{-2}$ )