Dr. Donald C. Griffin A. G. Professor of Physics B.S. Rollins College 1964 M.S. Purdue University 1966 Ph.D. Purdue University 1970

I have been a professor of physics at Rollins College since 1970. I received my Bachelor of Science from Rollins in 1964, and was awarded a Masters and a Ph.D. in theoretical atomic physics from Purdue University in 1966 and 1970, respectively. I have been a visiting staff member at Los Alamos National Laboratory, and Oak Ridge National Laboratory , a consultant to Livermore National Laboratory , a visiting fellow at the Joint Institute for Laboratory Astrophysics, and I am a fellow of the American Physical Society and the Institute of Physics.

I teach courses in mechanics, quantum mechanics, principles of physics, general physics, modern physics and physics for non-science majors. I perform research in theoretical atomic scattering theory in support of the U.S. effort to develop controlled nuclear fusion as an energy source. My research is carried out on a 26-processor computer cluster in my laboratory as well as the IBM SP RS/6000 massively parallel computer at the National Energy Research Supercomputer Center. It is supported by grants from the U.S. Department of Energy .

Publications from January 1, 2004 to present - Total number 170

1. Loch, S. D., Fontes, C. J., Colgan, J., Pindzola, M. S., Ballance, C. P., Griffin, D. C., O'Mullane, M.G., and Summers, H. P., "Collisional-Radiative Study of Lithium Plasmas,"  Physical Review E,  69, 066405 (2004).

2. Ballance, C. P. and Griffin, D. C., "Electron-impact excitation of neon: a pseudo-state convergence study," Journal of Physics B, 37, 2943 (2004).

3. Ballance, C. P., Griffin, D. C., Badnell, N. R., Loch, S. D., and Pindzola, M. S., "Continuum-Coupling in Electron-Atom Scattering," in Atomic Processes in Plasmas, edited by James S. Cohen, Stephane Mazevet, and David P. Kilcrease, American Institute of Physics, New York (2004).

4. Ballance, C. P., Griffin, D. C., Ludlow, J. A., and Pindzola, M. S., "Electron-impact ionization of metastable neon," Journal of Physics B, 37, 4779 (2004).

5. Loch, S. D., Witthoeft, M., Pindzola, M. S., Bray, I., Fursa, D. V., Fogle, M., Schuch, R., Glans, P., Ballance, C. P., and Griffin, D. C., "Influence of long-lived metastable levels on the electron-impact ionization of C²⁺, " Physical Review A, 71, 012716 (2005).

6. Berrington K. A., Ballance, C. P.,  Griffin, D. C., and Badnell, N. R., "The agreement of Breit-Pauli and Dirac R-matrix collision strengths for iron peak elements: an Fe¹⁴⁺ case study," Journal of Physics B, 38, 1667 (2005).   

7. Griffin, D. C., Ballance, C. P., Pindzola, M. S., Robicheaux, F., Loch, S. D., Ludlow, J. A., Witthoeft, M. C., Colgan, J., Fontes, C. J., and Schultz, D. R.,"The validity of classical trajectory and perturbative quantal methods for electron-impact ionization from excited states of H-like ions," Journal of Physics B 38, L199 (2005).

8. Pindzola, M. S., Robicheaux, F., Ludlow, J. A., Colgan, J., and Griffin, D. C., "Electron-impact excitation and ionization of H₂⁺ using a configuration-average distorted-wave approach," Physical Review A, 72 012716 (2005).

9. Loch, S. D., Ludlow, J. A., Pindzola, M. S., Whiteford, A. D., and Griffin, D. C., "Electron-impact ionization of atomic ions in the W isonuclear sequence," Physical Review A, 72, 052716 (2005).

10. Loch, S. D., Pindzola, M. S., Ballance, C. P., Griffin, D. C., "The effects of radiative cascades on the x-ray diagnostics lines of Fe¹⁶⁺," Journal of Physics B, 39 85 (2005).

11. Pindzola, M. S., Loch, S. D., Ballance C. P., and Griffin, D. C., "Electron-impact excitation cross sections for Fe¹⁶⁺ in the configuration-average distorted-wave approximation," Physical Review A, 73 012718 (2006). 

12. Ballance, C. P., Griffin, D. C., Loch, S. D., Boivin, R. F., and Pindzola, M. S., "Collisional-radiative calculations of He line emission in low-temperature plasmas," Physical Review A, 74 012719-1 (2006).  

13. Ballance, C. P. and Griffin, D. C., "Relativistic radiatively damped R-matrix calculation of the electron-impact excitation of W⁴⁶⁺," Journal of Physics B, 39 3617 (2006).

14. Loch, S. D., Colgan, J. Witthoeft M. C. Pindzola, M. S., Balance C. P., Mitnik D. M. Griffin, D. C., O'Mullane, M. G., Badnell, N. R., and Summers, H. P., "Generalized collisional-radiative model for light elements. A: Data for the Li isonuclear sequence," Atomic Data and Nuclear Data Tables 92 813 (2006).

15. Topcu, T., Pindzola, M. S., Ballance, C. P.,  Griffin, D. C., and Robicheaux, F., "Electron-impact ionization of highly excited hydrogenlike ions in a collinear s-wave model," Physical Review A, 74, 062708 (2006).

16. Griffin, D. C. and Pindzola, M. S., "Non-Perturbative Quantal Methods For Electron-Atom Scattering Processes," Advances in Atomic, Molecular and Optical Physics Vol. 54, Edited by  Paul R. Berman, Chun C. Lin and Ennio Arimondo, Academic Press, Amsterdam, Boston, Heidelberg, London, New York, Oxford, Paris, San Diego, San Franciso, Singapore, Sydney, and Tokyo (2007).

17. Ballance, C. P. and Griffin, D. C., "Electron-impact excitation of W⁴⁴⁺ and W⁴⁵⁺," Journal of Physics B, 40, 247 (2007).

18. Ballance, C. P., Griffin, D. C., Pindzola, M. S., and Loch, S. D., "Electron-impact ionization of argon using the R-matrix with pseudo-states method," Journal of Physics B, 40 F27 (2007).

19. Ballance, C. P.,  Griffin, D. C., Berrington, K. A., and Badnell, N. R., "Electron-impact excitation of neutral boron using the R-matrix with pseudostates method," Journal of Physics B, 40 1131 (2007).

20. Pindzola, M. S., Robicheaux, F., Loch, S. D., Berengut, J. C., Topcu, T., Colgan, J., Foster, M., Griffin, D. C., Ballance, C. P., Schultz, D. R., Minami, T., Badnell, N. R., Witthoeft, M. C., Plante, D. R., Mitnik, D. M., Ludlow, J. A., and Kleiman, U, "The time-dependent close-coupling method for atomic and molecular collision processes," Journal of Physics B, 40 R39 (2007).

21. Berengut, J. C., Loch S. D., Pindzola, M. S., Ballance, C. P., and Griffin, D. C., "Electron-impact ionization of the boron atom," Physical Review A, 76 042704 (2007).

22. Pindzola M S, Robicheaux, F., Loch, S. D. Berengut, J. C., Colgan J, Foster M, Griffin, D. C., Ballance, C. P., Badnell, N. R., Witthoeft, M. C., Schultz, D. R. and Minami, T., "Time-dependent close-coupling calculations of atomic and molecular collision processes" Journal of  Physics.: Conference. Series. 88 012012 (2007).

23. Ballance, C. P., Griffin, D. C., and McLaughlin B. M., "Electron-impact excitation of Fe⁴⁺: an intermediate-coupling R-matrix calculation," Journal of Physics B, 40 F327 (2007).

24. Griffin, D. C., Ballance C. P., Loch, S. D., and Pindzola, M. S., "Electron-impact excitation of Ar⁺: an improved determination of Ar impurity influx in tokamaks," Journal of Physics B, 40, 4537 (2007).

25. Loch, S.D., Pindzola, M.S., Ballance, C. P., Griffin, D.C., Colgan J, Badnell, N.R., O’Mullane, M.G.  and Summers, H.P., "Generalized collisional radiative model for light elements. Part B: Data for the Be isonuclear sequence,"  Atomic Data and Nuclear Data Tables, 94, 257 (2008).

26. Ballance, C. P. and Griffin D. C., "An R-matrix with pseudo states calculation of electron-impact excitation in Ar." Journal of Physics B 41, 065201 (2008).