John R. Sabin
Professor of Physics and Chemistry

Quantum Theory Project
Department of Physics
University of Florida

VOICE: (352) 392-2263

EMAIL: sabin@qtp.ufl.edu

HOMEPAGE: http://www.qtp.ufl.edu/~sabin/

Research Interests

The characteristics of the deposition of energy in matter by swift,
massive particles is of interest in areas ranging from design of inertial
confinement fusion devices to radiation therapy. The understanding and prediction of the processes involved in such energy deposition provide the unifying theme of my research. The research program has three distinct but interrelated parts dealing with:

* stopping in atoms and molecules, with especial emphasis on
aggregation effects such as deviations from the Bragg rule, solid/gas
sample phase effects, and stopping in large molecules

* stopping in ultra-thin (several atomic layers) films as models for
imbedded layers, overlayers and interfaces and as intermediates between gas and solid targets

* trajectory dependent stopping if swift ions under channeling conditions in bulk targets, with emphasis on implantation profiles and exit energy/angle distributions.

Recent Publications

1. R. Cabrera-Trujillo, J.R. Sabin, Y. Ohrn, and E. Deumens, "Energy Loss Studies of Protons Colliding with Ethane: Preliminary Results," J. Elect. Spectros. 129, 303-308 (2003).

2. R. Chancey, L. Oddershede, F.E. Harris, and J.R. Sabin, "Fragmentation of Fullerenes," Phys. Rev. A 67, 043203 (7 pages) (2003). [also published in: Virtual Journal of Nanoscale Science and Technology 7/18, (2003).]

3. E.S. Kryachko and J.R. Sabin, "Quantum Chemical Study of the
Hydrogen-Bonded Patterns in the AT Base Pair of DNA: The Origins of
Tautomeric Mispairs, Base Flipping, and Watson-Crick ? Hoogsteen
Conversion," Int. J. Quantum Chem. 91, 695-710 (2003).

4. S. Peter Apell, J.R. Sabin, and J. Oddershede, "Molecular Shape and the Bragg Rule," Phys. Rev. A 66, 034701-(4 pages) (2002).

5. R. Cabrera-Trujillo, Y.Ohrn, E. Deumens, J.R. Sabin, and B.G. Lindsay, "Theoretical and Experimental Studies of the H+ - N2 System: Differential Cross Sections for Direct and Charge-Transfer Scattering at Kilo-Electron-Volt Energies," Phys. Rev. A 66, 042712-(7 pages) (2002).

6. R. Cabrera-Trujillo, J.R. Sabin, E. Deumens, and Y. Ohrn, "Stopping
Cross Section for N4+ -> H at low Projectile Velocity," Phys. Rev. A 66, 022706-(7 pages) (2002).

7. S.A. Malinovskaya, R. Cabrera-Trujillo, John R. Sabin, E. Deumens, and Y. Ohrn, "Dynamics of Proton-Acetylene Collisions at 30 eV," J. Chem. Phys., 117, 1103-1108 (2002).

8. R. Cabrera-Trujillo, Y. Ohrn, E. Deumens, and J.R. Sabin, "Trajectory and Molecular Binding Effects in Stopping Cross section for Hydrogen Beams on H2," J. Chem. Phys. 116, 2783-2793 (2002).

9. R. Cabrera-Trujillo, Y. Ohrn, J.R. Sabin, and E. Deumens, "Molecular Target and Projectile Angular Scattering Effects in Stopping Power and Charge Exchange at Low to Intermediate Projectile Energies," Phys. Rev. A 65, 024901-(4 pages) (2002).

10. S.P. Apell, J.R. Sabin, S.B. Trickey, and J. Oddershede, "Shape
Dependent Molecular Polarizabilities," Int. J. Quantum Chem. 86, 35-39 (2002).

.pdf files of these and earlier papers can be found at:
http://www.qtp.ufl.edu/~sabin/sblue17/pdf/