Photon Stimulated Desorption of MgS as a Potential Source of Sulfur in Mercury’s Exosphere - Data Files

Schaible, Micah J.; Sarantos, Menelaos; Anzures, Brendan A.; Parman, Stephen W.; Orlando, Thomas M.

Title:

Photon Stimulated Desorption of MgS as a Potential Source of Sulfur in Mercury’s Exosphere - Data Files

dc.contributor.author	Schaible, Micah J.
dc.contributor.author	Sarantos, Menelaos
dc.contributor.author	Anzures, Brendan A.
dc.contributor.author	Parman, Stephen W.
dc.contributor.author	Orlando, Thomas M.
dc.contributor.corporatename	Georgia Institute of Technology. School of Chemistry and Biochemistry
dc.date.accessioned	2020-07-14T11:56:34Z
dc.date.available	2020-07-14T11:56:34Z
dc.date.issued	2020-06-14
dc.description	Data related to the manuscript: Schaible, M. J., Sarantos, M., Anzures, B. A., Parman, S. W., & Orlando, T. M. (2020). Photon-stimulated desorption of MgS as a potential source of sulfur in Mercury's exosphere. Journal of Geophysical Research: Planets, 125, e2020JE006479. https://doi.org/10.1029/2020JE006479	en_US
dc.description.abstract	Mercury has a relatively high sulfur content on its surface, and a signal consistent with S+ was observed by the fast ion plasma spectrometer (FIPS) instrument on the MESSENGER spacecraft. To help confirm this assignment and to better constrain the sources of exospheric sulfur at Mercury, 193 nm photon stimulated desorption (PSD) of neutral sulfur atoms (S0) from MgS substrates was studied using resonance enhanced multiphoton ionization (REMPI) and time-of-flight (TOF) mass spectrometry. Though the PSD process is inherently non-thermal, the measured velocity distributions were fit using flux weighted Maxwellian distributions with translation energies ˂E> expressed as translational “temperatures” Tt = ˂E>/µkB. A bi-modal distribution consisting of both thermal (Tt = 300 K) and supra-thermal (Tt >1000 K) components in roughly a 2:1 ratio was found to best fit the data. The experimental PSD cross-section, ~4×10-22 cm2, and integrated velocity distributions were used to calculate the PSD source rate of S0 into the exosphere of Mercury. Exosphere simulations using the calculated rates demonstrate that PSD is likely a primary source to S0 in Mercury’s exosphere at low (<1000 km) altitudes.	en_US
dc.description.sponsorship	NASA Planetary Atmospheres Program #NNX14AH41G	en_US
dc.identifier.uri	http://hdl.handle.net/1853/63007
dc.publisher	Georgia Institute of Technology
dc.relation.issupplementto	https://doi.org/10.1029/2020JE006479
dc.subject	Mercury	en_US
dc.subject	Sulfur	en_US
dc.subject	Exosphere	en_US
dc.subject	Photon stimulated desorption	en_US
dc.title	Photon Stimulated Desorption of MgS as a Potential Source of Sulfur in Mercury’s Exosphere - Data Files	en_US
dc.title.alternative	Photon Stimulated Desorption of MgS as a Potential Source of Sulfur in Mercury’s Exosphere Dataset	en_US
dc.title.alternative	Photon Stimulated Desorption of MgS as a Potential Source of Sulfur in Mercury’s Exosphere Dataset	en_us
dc.type	Dataset	en_US
dspace.entity.type	Publication
local.contributor.author	Orlando, Thomas M.
local.contributor.corporatename	School of Chemistry and Biochemistry
local.contributor.corporatename	College of Sciences
relation.isAuthorOfPublication	fa8c3886-9348-4bc0-ba36-27aa4f9296f6
relation.isOrgUnitOfPublication	f1725b93-3ab8-4c47-a4c3-3596c03d6f1e
relation.isOrgUnitOfPublication	85042be6-2d68-4e07-b384-e1f908fae48a