Phillip R. Certain

2.6k total citations
51 papers, 2.2k citations indexed

About

Phillip R. Certain is a scholar working on Atomic and Molecular Physics, and Optics, Statistical and Nonlinear Physics and Spectroscopy. According to data from OpenAlex, Phillip R. Certain has authored 51 papers receiving a total of 2.2k indexed citations (citations by other indexed papers that have themselves been cited), including 35 papers in Atomic and Molecular Physics, and Optics, 10 papers in Statistical and Nonlinear Physics and 10 papers in Spectroscopy. Recurrent topics in Phillip R. Certain's work include Advanced Chemical Physics Studies (23 papers), Atomic and Molecular Physics (12 papers) and Cold Atom Physics and Bose-Einstein Condensates (9 papers). Phillip R. Certain is often cited by papers focused on Advanced Chemical Physics Studies (23 papers), Atomic and Molecular Physics (12 papers) and Cold Atom Physics and Bose-Einstein Condensates (9 papers). Phillip R. Certain collaborates with scholars based in United States, Israel and United Kingdom. Phillip R. Certain's co-authors include Nimrod Moiseyev, A S Dickinson, Joseph M. Norbeck, Frank Weinhold, K. T. Tang, Jean M. Standard, Joseph O. Hirschfelder, Shmuel Friedland, Erich Steiner and P. J. Kuntz and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Physical Review Letters and The Journal of Chemical Physics.

In The Last Decade

Phillip R. Certain

50 papers receiving 2.0k citations

Peers

Phillip R. Certain

AMPO

SPECT

SNP

PTC

F. Coester United States

Walter R. Thorson Canada

Jacek Karwowski Poland

Saul T. Epstein United States

James Lill United States

John G. Zabolitzky Germany

H. W. Galbraith United States

Frederick R. W. McCourt Canada

Harris J. Silverstone United States

J. Sucher United States

F. Coester United States

Phillip R. Certain

2.2k ×1.1

AMPO

396 ×0.8

SPECT

193 ×0.6

SNP

145 ×0.8

193 ×1.5

PTC

Citations per year, relative to Phillip R. Certain Phillip R. Certain (= 1×) peers F. Coester

Countries citing papers authored by Phillip R. Certain

Since Specialization

Citations

This map shows the geographic impact of Phillip R. Certain's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Phillip R. Certain with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Phillip R. Certain more than expected).

Fields of papers citing papers by Phillip R. Certain

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Phillip R. Certain. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Phillip R. Certain. The network helps show where Phillip R. Certain may publish in the future.

Co-authorship network of co-authors of Phillip R. Certain

This figure shows the co-authorship network connecting the top 25 collaborators of Phillip R. Certain. A scholar is included among the top collaborators of Phillip R. Certain based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Phillip R. Certain. Phillip R. Certain is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Hirschfelder, Joseph O. & Phillip R. Certain. (2009). Summary of exchange perturbation calculations for H2 at large separations. International Journal of Quantum Chemistry. 2(S2). 125–135.

Certain, Phillip R. & Nimrod Moiseyev. (1987). Highly excited vibrational states by adiabatic vs self-consistent-field methods. The Journal of Chemical Physics. 86(4). 2146–2151. 10 indexed citations

Colbert, Daniel T., et al.. (1986). Non-dilatation-analytic potential. Physical review. A, General physics. 33(5). 3560–3562. 5 indexed citations

Certain, Phillip R., et al.. (1985). Natural orbital analysis of vibration-rotation wave functions. The Journal of Physical Chemistry. 89(21). 4464–4472. 11 indexed citations

Hancock, Gene C., et al.. (1982). Near Hartree–Fock calculation of the H+H2 potential energy surface. The Journal of Chemical Physics. 76(6). 3119–3122. 4 indexed citations

Moiseyev, Nimrod, et al.. (1981). Polar representation of complex-rotated resonance wave functions. The Journal of Physical Chemistry. 85(16). 2354–2359. 2 indexed citations

Moiseyev, Nimrod & Phillip R. Certain. (1978). On the angular correlation of electrons in configuration interaction wavefunctions. Chemical Physics Letters. 55(3). 451–453. 3 indexed citations

Moiseyev, Nimrod, Phillip R. Certain, & Frank Weinhold. (1978). Complex‐coordinate studies of helium autoionizing resonances. International Journal of Quantum Chemistry. 14(6). 727–736. 51 indexed citations

Certain, Phillip R., et al.. (1977). Hyperfine Structure in the Infrared Spectrum of HD. Physical Review Letters. 38(15). 824–826. 19 indexed citations

10.

Certain, Phillip R., et al.. (1975). Perturbation theory for short-range atomic interactions. II. The radius of convergence. The Journal of Chemical Physics. 62(6). 2406–2410. 3 indexed citations

11.

Certain, Phillip R., et al.. (1975). Perturbation theory for short-range atomic interactions. I. Numerical results. The Journal of Chemical Physics. 62(4). 1402–1408. 2 indexed citations

12.

Certain, Phillip R. & R. Claude Woods. (1973). On the dipole moment of CO+. The Journal of Chemical Physics. 58(12). 5837–5838. 14 indexed citations

13.

Epstein, Saul T. & Phillip R. Certain. (1973). Comment: ``On a modified Rayleigh-Schrödinger perturbation expansion''. The Journal of Chemical Physics. 58(6). 2670–2671. 2 indexed citations

14.

Certain, Phillip R., et al.. (1973). On the long-range hyperfine shift in HeH. Journal of Physics B Atomic and Molecular Physics. 6(3). L39–L41. 3 indexed citations

15.

Certain, Phillip R. & Joseph O. Hirschfelder. (1970). New Partitioning Perturbation Theory. III. Applications to Electron Exchange. The Journal of Chemical Physics. 52(12). 5992–5999. 22 indexed citations

16.

Certain, Phillip R., Joseph O. Hirschfelder, & Saul T. Epstein. (1969). Application of exchange perturbation theories to the delta-function model of H+2. Chemical Physics Letters. 4(6). 401–404. 7 indexed citations

17.

Certain, Phillip R.. (1968). One-Dimensional Model for Exchange Forces. The Journal of Chemical Physics. 49(1). 35–38. 19 indexed citations

18.

Certain, Phillip R., Joseph O. Hirschfelder, W Kołos, & L. Wolniewicz. (1968). Exchange and Coulomb Energy of H2 Determined by Various Perturbation Methods. The Journal of Chemical Physics. 49(1). 24–34. 58 indexed citations

19.

Brown, W. Byers & Phillip R. Certain. (1967). A SINGLE VARIABLE VARIATIONAL APPROXIMATION FOR A PERTURBED SCHRÖDINGER EQUATION. Proceedings of the National Academy of Sciences. 57(5). 1206–1212. 3 indexed citations

20.

Certain, Phillip R., et al.. (1964). 13C-H coupling constants and maximum overlap orbitals in some three-membered heterocyclic compounds. Theoretical Chemistry Accounts. 2(4). 324–331. 21 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact