- Title
- Ion irradiation ($He^+$) of an Tagish Lake meteorite pellet probed by NIR spectroscopy
- Data reference
- Lantz, Cateline (2015): Ion irradiation ($He^+$) of an Tagish Lake meteorite pellet probed by NIR spectroscopy. SSHADE/DAYSY (OSUG Data Center). Dataset/Spectral Data.
- Publications
- Database(s)
- Experimentalists
- Type(s)
- laboratory measurement
- Description
- NIR spectra of Tagish Lake meteorite pellet, before and after ion irradiation at different doses.
- Number of spectra
- 5
- Variable type(s)
-
- irradiation dose
- Comments
- We irradiated one pellet of Tagish Lake meteorite on the IRMA platforme (CSNSM, Orsay), using $He^+$ ions at 40 keV. The sample was mounted vertically and ion irradiation was performed at normal incidence. The pellet was irradiated at progressively increased fluences: $5.10^{15}, 1.10^{16}, 3.10^{16} and 6.10^{16} ions.cm{-2}$. The whole pellet surface is irradiated at each step except a corona of 500 μm thick on the pellet edge that was hidden by the sample holder.
- Laboratory
- Institut d'Astrophysique Spatiale (IAS)
- Instrument
- Bruker Tensor - reflection Near-IR
- Sample holder
- The sample is mounted on a vertical holder in the vacuum chamber of INGMAR setup (IrradiatioN de Glaces et Météorites Analysées par Réflectance VIS-IR, IAS-CSNSM/Orsay)
- 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 4011.40844562 - 11756.5316351 16.0 1.0
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
- bidirectional
- Observation mode
- fixed angles
- Incidence angle
- 20.0°
- Emergence angle
- 15.0°
- Phase angle
- 15.0°
- Observation mode
- single spot
- Spatial resolution
- 3000.0 ${\pm}$ 1000.0 ${\mu}m$
- Comments
- The collecting spot size is 3–4 mm, larger than the pellet heterogeneity, and thus representative of all constituents of the meteorite (matrix and chondrules).
- Date begin - end
- 2015-03-05 - 2015-03-11
Versions
- Release date
- 2018-12-02 18:40:34 UTC+0000
- Version (Date)
- #1 (2018-12-02 18:36:19 UTC+0000, Updated: 2018-12-02 20:51:38 UTC+0000)
