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Dr. William Simpson

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Courses::Research Projects::Papers and Publications::Professional Associations::Personal Pursuits


Contact Information

Title:

Part-Time Faculty

Office:

SQU 434

Office 
Hours:

Dr. Simpson is off campus this semester.

E-mail:

wsimpson@csus.edu
simpsow@arc.losrios.edu

Phone:

(916) 278-7237 or (916) 484-8115

 

(916) 278-6518  (msg. only)

Mailing
Address:

Physics Department
CSU Sacramento
6000 J Street
Sacramento, CA 95819-6041

Courses ::


Research Projects/Interests ::

General Research Interests -- Experimental Surface Science
I am interested in the interactions of low-energy electrons and ions with the surfaces of crystalline and amorphous solids. I have studied the damage that they induce in a surface and how they can be used as tools to study surface chemistry and structure.
  • Radiation Damage in Crystalline and Amorphous Materials
  • Electron and Ion Spectoscopies
  • Modeling of Ion-Surface Interactions
Current Project -- Ion-Surface Interaction Simulator (ISIS)
A computer simulation of the processes that occur during the collision of low-energy ions with a solid surface.

Upcoming Project -- Enhanced Radiolysis of Water at a Water-Oxide Interface
Working in conjunction with researchers at U.C. Riverside and Los Alamos National Laboratory, I will be investigating how the radiation-induced decomposition of water is enhanced when oxides are present. This has direct application to nuclear weapons aging and nuclear waste storage and clean-up.

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Papers and Publications ::
Review Articles
 "Fundamental Studies of Halogen Reactions with III-V Semiconductor Surfaces," W.C. Simpson and J.A. Yarmoff, Annual Reviews of Physical Chemistry, 47, 527-554 (1996).
Photoelectron Spectroscopy & Halogen Surface Chemistry
 "Reactions of I2 and Cl2 with In- and As-Terminated InAs(001)," W.K. Wang, W.C. Simpson and J.A. Yarmoff, Phys. Rev. B. 61, 2164-2172 (2000).

 "Passivation versus Etching: Adsorption of I2 on InAs(001)," W.K. Wang, W.C. Simpson and J.A. Yarmoff, Phys. Rev. Lett. 81, 1465-1468 (1998).

 "Remote Inductive Effects in the Si 2p Spectra of Halogenated Silicon," W.C. Simpson, J.A. Yarmoff, W.-H. Hung and F.R. McFeely, Surf. Sci. 355, L283-L288 (1996).

 "The Temperature Dependence of the Cl2/GaAs(110) Surface Product Distribution," W.C. Simpson, W.M. Tong, C.B. Weare, D.K. Shuh and J.A. Yarmoff, J. Chem. Phys. 104, 320-325 (1996).
Energetic Processes in Water Ice
 "Production of O2 on Icy Satellites by Electronic Excitation of Low-Temperature Water Ice," M.T. Sieger, W.C. Simpson and T.M. Orlando, Nature 394, 554-556 (1998).

 "Dissociative Electron Attachment in Nanoscale Ice Films: Thickness and Charge Trapping Effects," W.C. Simpson, T.M. Orlando, L. Parenteau, K. Nagesha and L. Sanche, J. Chem. Phys. 108, 5027-5034 (1998).

 "Dissociative Electron Attachment in Nanoscale Ice Films: Temperature and Morphology Effects," W.C. Simpson, M.T. Sieger, T.M. Orlando, L. Parenteau, K. Nagesha and L. Sanche, J. Chem. Phys. 107, 8668-8677 (1997).

 "Electron Stimulated Desorption of D- (H-) from Condensed D2O (H2O) Films," W.C. Simpson, L. Parenteau, R.S. Smith, L. Sanche and T.M. Orlando, Surf. Sci. 390, 86-91 (1997).

 "Dissociative Electron Attachment Resonances in Nanoscale Water Films," W.C. Simpson, M.T. Sieger, G.A. Kimmel, L. Parenteau, L. Sanche and T.M. Orlando, Radiation Research 148, 491-492 (1997).
Ion-Surface Interactions
 "Ion-Surface Interactions in the Electron-Stimulated Desorption of Cl+ from Cl2/Si(111)-7x7," W.C. Simpson and J.A. Yarmoff, Phys. Rev. B 52, 2038-2046 (1995).
Surface Geometric Structure
 "Bonding Geometries of F and Cl on Si(100)-2x1," W.C. Simpson and J.A. Yarmoff, Surf. Sci. 359, 135-146 (1996).
Surface Electronic Structure
 "The Electron Stimulated Desorption of D+ from D2O ice: Surface Structure and Electronic Excitations," M.T. Sieger, W.C. Simpson and T.M. Orlando, Phys. Rev. B 56, 4925-4938 (1997).

 "Electronic Structure of GaF3 Films Grown on GaAs via Exposure to XeF2," P.R. Varekamp, W.C. Simpson, D.K. Shuh, T.D. Durbin, V. Chakarian and J.A. Yarmoff, Phys. Rev. B 50, 14267-14267 (1994).
Radiation Damage on Oxide Surfaces
 "Photon and Electron-Stimulated Desorption of O+ from Zirconia," W.C. Simpson, W.K. Wang, J.A. Yarmoff and T.M. Orlando, Surf. Sci. 423, 225-231 (1999).

(complete list ...)

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Professional Associations ::

  • American Association of Physics Teachers
  • American Vacuum Society

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Personal Pursuits ::

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last updated: 08/08/2004
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