| THEORY OF THE HYPERFINE STRUCTURE OF FREE ATOMS. L Armstrong Jr | 307 | 1971 |
| Resonant multiphoton ionization via the Fano autoionization formalism L Armstrong Jr, BL Beers, S Feneuille Physical Review A 12 (5), 1903, 1975 | 161 | 1975 |
| Exact solution of a realistic model for two-photon ionization BL Beers, L Armstrong Jr Physical Review A 12 (6), 2447, 1975 | 157 | 1975 |
| Relativistic effects on transition probabilities in the Li and Be isoelectronic sequences L Armstrong Jr, WR Fielder, DL Lin Physical Review A 14 (3), 1114, 1976 | 129 | 1976 |
| Competing in the global higher education marketplace: Outsourcing, twinning, and franchising. L Armstrong New directions for higher education 2007 (140), 2007 | 96 | 2007 |
| A new game in town: Competitive higher education L Armstrong Information, Communication & Society 4 (4), 479-506, 2001 | 89 | 2001 |
| Barriers to innovation and change in higher education L Armstrong TIAA-CREF Institute, 2017-02, 2016 | 87 | 2016 |
| Interference between radiative emission and autoionization in the decay of excited states of atoms L Armstrong Jr, CE Theodosiou, MJ Wall Physical Review A 18 (6), 2538, 1978 | 86 | 1978 |
| Multiconfiguration Hartree-Fock calculation of photoionization cross sections of the rare gases JR Swanson, L Armstrong Jr Physical Review A 15 (2), 661, 1977 | 86 | 1977 |
| Comments on the effect of the ponderomotive potential in the above-threshold ionization processes L Pan, L Armstrong, JH Eberly JOSA B 3 (10), 1319-1322, 1986 | 85 | 1986 |
| Distance learning: An academic leader's perspective on a disruptive product L Armstrong Change: The Magazine of Higher Learning 32 (6), 20-27, 2000 | 84 | 2000 |
| Coursera and MITx: Sustaining or disruptive L Armstrong | 65 | 2012 |
| Relativistic effects in the many-electron atom L Armstrong Jr, S Feneuille Advances in Atomic and Molecular Physics 10, 1-52, 1974 | 65 | 1974 |
| Photoinization cross sections for atomic chlorine using an open-shell random-phase approximation AF Starace, L Armstrong Jr Physical Review A 13 (5), 1850, 1976 | 61 | 1976 |
| Model study of multiphoton ionisation in strong fields M Edwards, L Pan, L Armstrong Jr Journal of Physics B: Atomic and Molecular Physics 17 (15), L515, 1984 | 59 | 1984 |
| Group properties of hydrogenic radial functions L Armstrong Jr Physical Review A 3 (5), 1546, 1971 | 53 | 1971 |
| Model study of above threshold multiphoton ionisation in strong fields M Edwards, L Pan, L Armstrong Jr Journal of Physics B: Atomic and Molecular Physics 18 (10), 1927, 1985 | 52 | 1985 |
| Comment concerning the study of autoionizing states using parametric generation L Armstrong Jr, BL Beers Physical Review Letters 34 (20), 1290, 1975 | 44 | 1975 |
| Theoretical analysis of the phase shift measurement of lifetimes using monochromatic light L Armstrong Jr, S Feneuille Journal of Physics B: Atomic and Molecular Physics 8 (4), 546, 1975 | 44 | 1975 |
| Quasi-particles in atomic shell theory L Armstrong, BR Judd Proceedings of the Royal Society of London. A. Mathematical and Physical …, 1970 | 42 | 1970 |
Bala SundaramProfessor of Physics, University of Massachusetts - BostonVerified email at umb.edu
