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Comparative study of 3.4 micron band features from carbon dust analogues obtained in pulsed plasmas

Published online by Cambridge University Press:  12 October 2020

Ioana Cristina Gerber ,
Alina Chiper ,
Valentin Pohoata Open the ORCID record for Valentin Pohoata [Opens in a new window] ,
Ilarion Mihaila  and
Ionut Topala Open the ORCID record for Ionut Topala [Opens in a new window]
Ioana Cristina Gerber
Affiliation:
Faculty of Physics, Iasi Plasma Advanced Research Center (IPARC), Alexandru Ioan Cuza University of Iasi, Bd. Carol I No. 11, Iasi, 700506, Romania email: [email protected]
Alina Chiper
Affiliation:
Faculty of Physics, Iasi Plasma Advanced Research Center (IPARC), Alexandru Ioan Cuza University of Iasi, Bd. Carol I No. 11, Iasi, 700506, Romania email: [email protected]
Valentin Pohoata
Affiliation:
Faculty of Physics, Iasi Plasma Advanced Research Center (IPARC), Alexandru Ioan Cuza University of Iasi, Bd. Carol I No. 11, Iasi, 700506, Romania email: [email protected]
Ilarion Mihaila
Affiliation:
Integrated Center of Environmental Science Studies in the North-Eastern Development Region (CERNESIM), Alexandru Ioan Cuza University of Iasi, Bd. Carol I No. 11, Iasi, 700506, Romania
Ionut Topala
Affiliation:
Faculty of Physics, Iasi Plasma Advanced Research Center (IPARC), Alexandru Ioan Cuza University of Iasi, Bd. Carol I No. 11, Iasi, 700506, Romania email: [email protected]
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Abstract

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Syntheses of carbon dust analogues are key experiments in laboratory astrophysics, as an approach to study some chemical and topological features of interplanetary and interstellar carbon dust. We report a comparative experimental study for carbon dust analogues obtained in (1) an atmospheric pressure dielectric barrier discharge (DBD), fed with helium – saturated hydrocarbons gas mixtures, (2) a low pressure radio frequency (RF) discharge and (3) a pulsed laser deposition (PLD) experiment with a Nd:YAG laser and a graphite target. The aliphatic –C–H stretching band, known as the 3.4 micron feature, as well as the CH2/CH3 ratio, the H/C ratio value and the physical appearance at microscopic scale, show a variability that is influenced by the synthesis method and the experimental parameters of each specific technique.

Keywords

infrared: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S350: Laboratory Astrophysics: From Observations to Interpretation , April 2019 , pp. 237 - 240
Copyright
© International Astronomical Union 2020

References

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