John H. Letcher

457 total citations
18 papers, 370 citations indexed

About

John H. Letcher is a scholar working on Atomic and Molecular Physics, and Optics, Spectroscopy and Radiology, Nuclear Medicine and Imaging. According to data from OpenAlex, John H. Letcher has authored 18 papers receiving a total of 370 indexed citations (citations by other indexed papers that have themselves been cited), including 8 papers in Atomic and Molecular Physics, and Optics, 5 papers in Spectroscopy and 4 papers in Radiology, Nuclear Medicine and Imaging. Recurrent topics in John H. Letcher's work include Advanced Chemical Physics Studies (8 papers), Atmospheric Ozone and Climate (4 papers) and Inorganic Fluorides and Related Compounds (3 papers). John H. Letcher is often cited by papers focused on Advanced Chemical Physics Studies (8 papers), Atmospheric Ozone and Climate (4 papers) and Inorganic Fluorides and Related Compounds (3 papers). John H. Letcher collaborates with scholars based in United States. John H. Letcher's co-authors include John R. Van Wazer, Mark L. Unland, Paul W. Schmidt, T. H. Dunning, Thom H. Dunning, N. W. Winter, Jean G. Riess and Ilyas Absar and has published in prestigious journals such as Journal of the American Chemical Society, The Journal of Chemical Physics and Journal of Applied Physics.

In The Last Decade

John H. Letcher

17 papers receiving 326 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
John H. Letcher United States	10	128	122	106	85	79	18	370
T. D. Coyle United States	15	92 0.7×	141 1.2×	215 2.0×	246 2.9×	104 1.3×	33	544
L. M. Sverdlov Russia	5	225 1.8×	216 1.8×	111 1.0×	41 0.5×	100 1.3×	36	491
S. Dobos Hungary	13	128 1.0×	110 0.9×	108 1.0×	91 1.1×	212 2.7×	47	462
E. P. Krainov	3	194 1.5×	190 1.6×	103 1.0×	37 0.4×	93 1.2×	4	439
Joseph Howard United Kingdom	12	151 1.2×	116 1.0×	36 0.3×	93 1.1×	170 2.2×	41	337
R. D. Ellison United States	10	50 0.4×	76 0.6×	57 0.5×	141 1.7×	117 1.5×	18	303
Andrea Pieretti Italy	11	109 0.9×	81 0.7×	131 1.2×	71 0.8×	121 1.5×	21	413
C. C. Stephenson United States	12	91 0.7×	46 0.4×	67 0.6×	57 0.7×	316 4.0×	17	400
Joe F. Lemons United States	8	53 0.4×	81 0.7×	32 0.3×	92 1.1×	136 1.7×	9	300
Cedric L. Chernick United States	15	171 1.3×	60 0.5×	78 0.7×	358 4.2×	128 1.6×	28	566

Countries citing papers authored by John H. Letcher

Since Specialization

Citations

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

Fields of papers citing papers by John H. Letcher

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John H. Letcher. 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 John H. Letcher. The network helps show where John H. Letcher may publish in the future.

Co-authorship network of co-authors of John H. Letcher

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

All Works

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18 of 18 papers shown

Letcher, John H., Ilyas Absar, & John R. Van Wazer. (2009). Use of localized orbitals to circumvent convergence difficulties in lcao-mo-scf calculations. International Journal of Quantum Chemistry. 6(S6). 451–452.

Letcher, John H.. (1992). An imaging device that uses the wavelet transformation as the image reconstruction algorithm. International Journal of Imaging Systems and Technology. 4(2). 98–108. 3 indexed citations

Letcher, John H.. (1989). Computer-assisted design of surface coils used in magnetic resonance imaging. I. The calculation of the magnetic field. Magnetic Resonance Imaging. 7(6). 581–583. 9 indexed citations

Letcher, John H., et al.. (1989). Computer-assisted design of surface coils used in magnetic resonance imaging. III. The design and construction of two long twin axial antennae for imaging of the whole human spine. Magnetic Resonance Imaging. 7(6). 591–597. 1 indexed citations

Letcher, John H.. (1989). The use of wiener deconvolution (an optimal filter) in nuclear magnetic resonance imaging. International Journal of Imaging Systems and Technology. 1(1). 109–112. 3 indexed citations

Unland, Mark L., John H. Letcher, Ilyas Absar, & John R. Van Wazer. (1971). The electronic structure of difluoromethane: ab initio studies in several basis sets and semiempirical calculations. Journal of the Chemical Society A Inorganic Physical Theoretical. 1328–1328. 2 indexed citations

Letcher, John H.. (1971). Localized Orbitals. II. Expanded Basis Sets. The Journal of Chemical Physics. 54(7). 3215–3221. 5 indexed citations

Unland, Mark L., John H. Letcher, & John R. Van Wazer. (1969). Characterization of Ground-State Wavefunctions by Measured Electronic Properties. III. A Gaussian Basis Self-Consistent-Field Calculation for Nitrogen Trifluoride. The Journal of Chemical Physics. 50(8). 3214–3219. 13 indexed citations

Letcher, John H., Mark L. Unland, & John R. Van Wazer. (1969). Ketene in a Gaussian Basis: LCAO–MO–SCF Wavefunction, One-Electron Properties, and Electron-Density Maps. The Journal of Chemical Physics. 50(5). 2185–2195. 15 indexed citations

10.

Unland, Mark L., John R. Van Wazer, & John H. Letcher. (1969). Ab initio calculation of the barrier to internal rotation in propylene using a Guassian basis self-consistent field wave function. Journal of the American Chemical Society. 91(5). 1045–1052. 21 indexed citations

11.

Unland, Mark L. & John H. Letcher. (1968). Characterization of Ground-State Wavefunctions by Measured Electronic Properties. I. 119Sn Mössbauer Isomer Shifts. The Journal of Chemical Physics. 49(6). 2706–2712. 13 indexed citations

12.

Letcher, John H. & T. H. Dunning. (1968). Localized Orbitals. I. σ Bonds. The Journal of Chemical Physics. 48(10). 4538–4543. 25 indexed citations

13.

Winter, N. W., Thom H. Dunning, & John H. Letcher. (1968). Formaldehyde Molecule in a Gaussian Basis. A Self-Consistent Field Calculation. The Journal of Chemical Physics. 49(4). 1871–1877. 29 indexed citations

14.

Riess, Jean G., John R. Van Wazer, & John H. Letcher. (1967). Phosphorus-31 chemical shifts of phosphonate anions. The Journal of Physical Chemistry. 71(6). 1925–1927. 9 indexed citations

15.

Letcher, John H. & John R. Van Wazer. (1966). Theoretical Interpretation of 31P NMR Chemical Shifts. II. Unsymmetrical Molecules. The Journal of Chemical Physics. 45(8). 2916–2925. 29 indexed citations

16.

Letcher, John H. & John R. Van Wazer. (1966). Theoretical Interpretation of 31P NMR Chemical Shifts. I. The Journal of Chemical Physics. 44(2). 815–829. 133 indexed citations

17.

Letcher, John H. & Paul W. Schmidt. (1966). Small-Angle X-Ray Scattering Determination of Particle-Diameter Distributions in Polydisperse Suspensions of Spherical Particles. Journal of Applied Physics. 37(2). 649–655. 36 indexed citations

18.

Letcher, John H. & John R. Van Wazer. (1966). Theoretical Interpretation of 31P NMR Chemical Shifts. III. Phosphorus with Five Like Substituents. The Journal of Chemical Physics. 45(8). 2926–2929. 24 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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