Laboratory for Astrophysics and Surface Physics (LASP-UVa)
Studying the interaction of energetic particles (ions, electrons and photons) with solid surfaces, with an emphasis on understanding the physical and chemical processes at play in our solar system and interstellar medium.Current Research
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Lunar Investigations: Surface & Exosphere
Maximizing the science derived from samples returned by the Apollo Program and lunar analog materials in preparation for future Artemis missions to the Moon.
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Understanding Asteroid Origins & Evolution
Investigating the physical and chemical effects of space weathering by solar-wind ions and micrometeorite bombardment through laboratory experiment and returned asteroid sample analysis.
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Mercury: Space Weathering and Exosphere Production
Quantifying sputtering desorption yields for exospheric constituents from the rough Hermean regolith and investigating compositional, chemical and optical change in sulfur- and carbon-rich magnesium silicates.
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Astrochemistry of the Icy Planets & ISM
Radiolysis and radiochemistry of condensed gas surfaces; measuring the binding energy of organic species to icy grains; & calculating the stability & chirality of magnesium nanosilicates
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KEVION Ion Irradiation Facility for Planetary Science
An ion accelerator for transformative research in studies of space weathering, radiolysis, radiosynthesis, sputtering, surface charging, radiation damage, instrument development and sample characterization.
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Nanoscale Materials Characterization Facility (NMCF)
Analysis of structure, composition, order, and defects with cutting-edge materials characterization tools, including: XPS, XRD, XRF, SEM/EDS, HR-TEM/EDS/EELS, optical imaging, AFM, FT-IR & Raman spectroscopies.
Recent Publications.....
K.B. Stelmach, C.A. Dukes, and R.T. Garrod, "A Search for Chirality in Hydrogenated Magnesium Nanosilicates: A DFT and TD-DFT Investigation," Journal of Physical Chemistry A, 128, 18, 3475–3494, (2024) https://doi.org/10.1021/acs.jpca.3c06521
D. Laczniak, M. Thompson, R. Christoffersen, C. Dukes, R. Morris, and L. Keller, “Investigating the role of incident ion flux in solar wind space weathering of carbon-rich asteroidal regolith via H+ and He+ irradiation of the Murchison meteorite" Icarus, Volume 410, 115883 (2024) https://doi.org/10.1016/j.icarus.2023.115883
C. Bu, L.S. Morrissey, B.C. Bostick, M.H. Burger, K. P. Bowen, S.N. Chillrud, D.L. Domingue, C.A. Dukes, D.S. Ebel, G.E. Harlow, P-M. Hillenbrand, D.A. Ivanov, R.M. Killen, J.M. Ross, D. Schury, O. J. Tucker, X. Urbain, R. Zhang, and D. W. Savin, “Absolute Doubly Differential Angular Sputtering Yields for 20 keV Kr+ on Polycrystalline Cu,” J. Appl. Phys. 21; 135 (3): 035302 (2024) https://doi.org/10.1063/5.0184417
Z. Sun, Z. Baraissov, C.A. Dukes, D. K. Dare, T. Oseroff, M. O. Thompson, D. A. Muller, M. U. Liepe, “Surface oxides, carbides, and impurities on RF superconducting Nb and Nb3Sn: A comprehensive analysis,” Supercond. Sci. Technol. 36 115030 (2023) DOI 10.1088/1361-6668/acff23
Affliliations
LASP Details
Our goal is to deduce the mechanisms leading to changes in remotely observed optical signatures (spectral reflectance or mass spectroscopy) by investigations of electronic excitation and how these excitations evolve and lead to the emission of light (luminescence), electrons, radiation, atoms and molecules (sputtering and photodesorption) and to radiation damage, chemical changes, surface charge or heat.