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Laser Desorption and Surface Scattering Studies


Weapons and Materials Research Directorate-FFP, Surface Science - FFP

RO# Location
AA.30.08.B3182 Aberdeen Proving Ground, MD 210055066


Name E-mail Phone
Sausa, Rosario C 410.306.0660


Laser-induced desorption and collision-induced dissociation (CID), resulting from supersonic molecular-beam molecule-surface scattering, can be used to examine chemical and dynamical processes that occur on solid surfaces. These processes are important in the identification of surface species for possible sensitive detection of energetic materials, and in understanding surface erosion and coating. The objective of this research is to study the surface scattering and laser-induced desorption of simple NOx or metal-containing compounds from Ag, Pt, or Fe surfaces. Laser-induced fluorescence, resonance-enhanced multiphoton ionization with time-of-flight mass spectrometry, or quadrupole mass spectrometry are used to (1) identify the scattered or desorbed species; (2) measure their rotational, vibrational, and transnational energy distributions; and (3) ascertain the mechanisms for laser desorption, CID, and epitaxial growth. Dedicated equipment includes an ultrahigh vacuum apparatus equipped for ion detection and laser-induced fluorescence; a data acquisition and analysis system; and several pulsed, ultraviolet-visible lasers.


Laser spectra; Laser-induced fluorescence; Mass spectra; Molecular collisions; Solid surfaces; Surface scattering;


Citizenship:  Open to U.S. citizens
Level:  Open to Postdoctoral applicants
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