K. Rajnak

9.0k total citations · 5 hit papers
33 papers, 7.8k citations indexed

About

K. Rajnak is a scholar working on Materials Chemistry, Atomic and Molecular Physics, and Optics and Inorganic Chemistry. According to data from OpenAlex, K. Rajnak has authored 33 papers receiving a total of 7.8k indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Materials Chemistry, 13 papers in Atomic and Molecular Physics, and Optics and 11 papers in Inorganic Chemistry. Recurrent topics in K. Rajnak's work include Luminescence Properties of Advanced Materials (15 papers), Lanthanide and Transition Metal Complexes (11 papers) and Advanced Chemical Physics Studies (11 papers). K. Rajnak is often cited by papers focused on Luminescence Properties of Advanced Materials (15 papers), Lanthanide and Transition Metal Complexes (11 papers) and Advanced Chemical Physics Studies (11 papers). K. Rajnak collaborates with scholars based in United States, France and Canada. K. Rajnak's co-authors include W. T. Carnall, P. R. Fields, G. L. Goodman, Rakesh Rana, B. G. Wybourne, Norman M. Edelstein, William F. Krupke, John G. Conway, John C. Morrison and Hannah Crosswhite and has published in prestigious journals such as The Journal of Chemical Physics, Physical review. B, Condensed matter and Inorganic Chemistry.

In The Last Decade

K. Rajnak

33 papers receiving 7.6k citations

Hit Papers

Electronic Energy Levels in the Trivalent Lanthanide Aquo... 1968 2026 1987 2006 1968 1968 1989 1968 1968 500 1000 1.5k 2.0k 2.5k
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Electronic Energy Levels in the Trivalent Lanthanide Aquo Ions. I. Pr3+, Nd3+, Pm3+, Sm3+, Dy3+, Ho3+, Er3+, and Tm3+
    1968 2.9k citations W. T. Carnall, P. R. Fields et al. The Journal of Chemical Physics profile →
  2. Spectral Intensities of the Trivalent Lanthanides and Actinides in Solution. II. Pm3+, Sm3+, Eu3+, Gd3+, Tb3+, Dy3+, and Ho3+
    1968 1.0k citations W. T. Carnall, P. R. Fields et al. The Journal of Chemical Physics profile →
  3. A systematic analysis of the spectra of the lanthanides doped into single crystal LaF3
    1989 997 citations W. T. Carnall, K. Rajnak et al. The Journal of Chemical Physics profile →
  4. Electronic Energy Levels of the Trivalent Lanthanide Aquo Ions. IV. Eu3+
    1968 737 citations W. T. Carnall, P. R. Fields et al. The Journal of Chemical Physics profile →
  5. Electronic Energy Levels of the Trivalent Lanthanide Aquo Ions. III. Tb3+
    1968 641 citations W. T. Carnall, P. R. Fields et al. The Journal of Chemical Physics profile →

Peers

K. Rajnak
W. T. Carnall United States
John B. Gruber United States
W. M. Yen United States
D J Newman United Kingdom
H. J. Guggenheim United States
R. Moncorgé France
Hans U. Güdel Switzerland
B. Jacquier France
Baldassare Di Bartolo United States
Enrico Cavalli Italy
W. T. Carnall United States
K. Rajnak
Citations per year, relative to K. Rajnak K. Rajnak (= 1×) peers W. T. Carnall

Countries citing papers authored by K. Rajnak

Since Specialization
Citations

This map shows the geographic impact of K. Rajnak'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 K. Rajnak with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites K. Rajnak more than expected).

Fields of papers citing papers by K. Rajnak

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by K. Rajnak. 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 K. Rajnak. The network helps show where K. Rajnak may publish in the future.

Co-authorship network of co-authors of K. Rajnak

This figure shows the co-authorship network connecting the top 25 collaborators of K. Rajnak. A scholar is included among the top collaborators of K. Rajnak 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 K. Rajnak. K. Rajnak is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Rajnak, K., et al.. (1984). Uranium five (U v), the ^1S_0 level, and a parametric analysis of the 5ƒ^2 configuration. Journal of the Optical Society of America B. 1(1). 45–45. 31 indexed citations
2.
3.
Rajnak, K., et al.. (1984). Analysis of the optical spectrum of Np(BD4)4 diluted in Zr(BD4)4 and the magnetic properties of Np(BH4)4 and Np(BH3CH3)4. The Journal of Chemical Physics. 80(12). 5951–5962. 18 indexed citations
4.
Delamoye, P., K. Rajnak, M. Genet, & Norman M. Edelstein. (1983). Parametric analysis of the energy levels ofU4+inD2dand limitingD2sites in incommensurate ThBr4. Physical review. B, Condensed matter. 28(9). 4923–4930. 37 indexed citations
5.
Carnall, W. T. & K. Rajnak. (1975). Electronic energy level and intensity correlations in the spectra of the trivalent actinide aquo ions. II. Cm3+. The Journal of Chemical Physics. 63(8). 3510–3514. 48 indexed citations
6.
Morrison, John C., et al.. (1970). EVALUATION OF EFFECTIVE OPERATORS FOR CONFIGURATIONINTERACTION. Le Journal de Physique Colloques. 31(C4). C4–167. 5 indexed citations
7.
Carnall, W. T., P. R. Fields, & K. Rajnak. (1968). Electronic Energy Levels of the Trivalent Lanthanide Aquo Ions. III. Tb3+. The Journal of Chemical Physics. 49(10). 4447–4449. 641 indexed citations breakdown →
8.
Carnall, W. T., P. R. Fields, & K. Rajnak. (1968). Electronic Energy Levels of the Trivalent Lanthanide Aquo Ions. IV. Eu3+. The Journal of Chemical Physics. 49(10). 4450–4455. 737 indexed citations breakdown →
9.
Carnall, W. T., P. R. Fields, & K. Rajnak. (1968). ELECTRONIC ENERGY LEVELS IN THE TRIVALENT LANTHANIDE AQUO IONS. I. Pr$sup 3+$, Nd$sup 3+$, Pm$sup 3+$, Sm$sup 3+$, Dy$sup 3+$, Ho$sup 3+$, Er$sup 3+$, AND Tm$sup 3$ .. OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information). 24 indexed citations
10.
Carnall, W. T., P. R. Fields, & K. Rajnak. (1968). Electronic Energy Levels in the Trivalent Lanthanide Aquo Ions. I. Pr3+, Nd3+, Pm3+, Sm3+, Dy3+, Ho3+, Er3+, and Tm3+. The Journal of Chemical Physics. 49(10). 4424–4442. 2942 indexed citations breakdown →
11.
Carnall, W. T., P. R. Fields, & K. Rajnak. (1968). Electronic Energy Levels of the Trivalent Lanthanide Aquo Ions. II. Gd3+. The Journal of Chemical Physics. 49(10). 4443–4446. 272 indexed citations
12.
Carnall, W. T., P. R. Fields, & K. Rajnak. (1968). Spectral Intensities of the Trivalent Lanthanides and Actinides in Solution. II. Pm3+, Sm3+, Eu3+, Gd3+, Tb3+, Dy3+, and Ho3+. The Journal of Chemical Physics. 49(10). 4412–4423. 1037 indexed citations breakdown →
13.
Rajnak, K. & William F. Krupke. (1967). Energy Levels of Ho3+ in LaCl3. The Journal of Chemical Physics. 46(9). 3532–3542. 65 indexed citations
14.
Conway, John G. & K. Rajnak. (1966). Energy Levels of Pu3+ in Lanthanum Trichloride. The Journal of Chemical Physics. 44(1). 348–354. 20 indexed citations
15.
Rajnak, K.. (1965). Configuration Interaction in the 4f^3 Configuration of Pr iii*. Journal of the Optical Society of America. 55(2). 126–126. 39 indexed citations
16.
Rajnak, K.. (1965). Configuration-Interaction Effects on the ``Free-Ion'' Energy Levels of Nd3+ and Er3+. The Journal of Chemical Physics. 43(3). 847–855. 90 indexed citations
17.
Rajnak, K. & B. G. Wybourne. (1964). Configuration Interaction in Crystal Field Theory. The Journal of Chemical Physics. 41(2). 565–569. 99 indexed citations
18.
Rajnak, K. & B. G. Wybourne. (1964). Electrostatically Correlated Spin-Orbit Interactions inlN-Type Configurations. Physical Review. 134(3A). A596–A600. 51 indexed citations
19.
Rajnak, K. & B. G. Wybourne. (1963). Configuration Interaction Effects inlNConfigurations. Physical Review. 132(1). 280–290. 265 indexed citations
20.
Rajnak, K.. (1962). Approximate Excited Eigenfunctions for Pr3+ and Tm3+. The Journal of Chemical Physics. 37(10). 2440–2444. 63 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.

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2026