TY  - JOUR
AU  - Tigrine, Sarah
AU  - Carrasco, Nathalie
AU  - Božanić, Dušan K.
AU  - Garcia, Gustavo A.
AU  - Nahon, Laurent
PY  - 2018
UR  - http://stacks.iop.org/0004-637X/867/i=2/a=164?key=crossref.c825be4da3a1774b12c5ea80b3bc8340
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8066
AB  - Thanks to the Cassini-Huygens mission, it is now established that the first aerosols in Titan's upper atmosphere are found from an altitude of similar to 1200 km. Once they are formed and through their descent toward the surface, these nanoparticles are submitted to persistent far-ultraviolet (FUV) radiation that can reach lower atmospheric layers. Such an interaction has an impact, especially on the chemistry and charge budget of the atmospheric compounds. Models are useful to understand this photoprocessing, but they lack important input data such as the photoemission threshold or the absolute photoabsorption/emission cross sections of the aerosols. In order to quantify the photoemission processes, analogs of Titan's aerosols have been studied with the DESIRS FUV beamline at the synchrotron SOLEIL as isolated substrate-free nanoparticles. We present here the corresponding angle-resolved photoelectron spectroscopy data recorded at different FUV photon energies. The results show a very low photoionization threshold (6.0 +/- 0.1 eV similar to 207 nm) and very high absolute ionization cross sections (similar to 10(6) Mb), indicating that FUV photoemission from aerosols is an intense source of slow electrons that has to be taken into account in photochemical models of Titan's atmosphere.
T2  - The Astrophysical Journal
T1  - FUV Photoionization of Titan Atmospheric Aerosols
VL  - 867
IS  - 2
SP  - 164
DO  - 10.3847/1538-4357/aae4d8
ER  - 

@article{
author = "Tigrine, Sarah and Carrasco, Nathalie and Božanić, Dušan K. and Garcia, Gustavo A. and Nahon, Laurent",
year = "2018",
abstract = "Thanks to the Cassini-Huygens mission, it is now established that the first aerosols in Titan's upper atmosphere are found from an altitude of similar to 1200 km. Once they are formed and through their descent toward the surface, these nanoparticles are submitted to persistent far-ultraviolet (FUV) radiation that can reach lower atmospheric layers. Such an interaction has an impact, especially on the chemistry and charge budget of the atmospheric compounds. Models are useful to understand this photoprocessing, but they lack important input data such as the photoemission threshold or the absolute photoabsorption/emission cross sections of the aerosols. In order to quantify the photoemission processes, analogs of Titan's aerosols have been studied with the DESIRS FUV beamline at the synchrotron SOLEIL as isolated substrate-free nanoparticles. We present here the corresponding angle-resolved photoelectron spectroscopy data recorded at different FUV photon energies. The results show a very low photoionization threshold (6.0 +/- 0.1 eV similar to 207 nm) and very high absolute ionization cross sections (similar to 10(6) Mb), indicating that FUV photoemission from aerosols is an intense source of slow electrons that has to be taken into account in photochemical models of Titan's atmosphere.",
journal = "The Astrophysical Journal",
title = "FUV Photoionization of Titan Atmospheric Aerosols",
volume = "867",
number = "2",
pages = "164",
doi = "10.3847/1538-4357/aae4d8"
}

Tigrine, S., Carrasco, N., Božanić, D. K., Garcia, G. A.,& Nahon, L.. (2018). FUV Photoionization of Titan Atmospheric Aerosols. in The Astrophysical Journal, 867(2), 164.
https://doi.org/10.3847/1538-4357/aae4d8

Tigrine S, Carrasco N, Božanić DK, Garcia GA, Nahon L. FUV Photoionization of Titan Atmospheric Aerosols. in The Astrophysical Journal. 2018;867(2):164.
doi:10.3847/1538-4357/aae4d8 .

Tigrine, Sarah, Carrasco, Nathalie, Božanić, Dušan K., Garcia, Gustavo A., Nahon, Laurent, "FUV Photoionization of Titan Atmospheric Aerosols" in The Astrophysical Journal, 867, no. 2 (2018):164,
https://doi.org/10.3847/1538-4357/aae4d8 . .