Ray Freeman

23.9k total citations · 10 hit papers
227 papers, 19.8k citations indexed

About

Ray Freeman is a scholar working on Spectroscopy, Nuclear and High Energy Physics and Radiology, Nuclear Medicine and Imaging. According to data from OpenAlex, Ray Freeman has authored 227 papers receiving a total of 19.8k indexed citations (citations by other indexed papers that have themselves been cited), including 183 papers in Spectroscopy, 159 papers in Nuclear and High Energy Physics and 93 papers in Radiology, Nuclear Medicine and Imaging. Recurrent topics in Ray Freeman's work include Advanced NMR Techniques and Applications (168 papers), NMR spectroscopy and applications (157 papers) and Advanced MRI Techniques and Applications (91 papers). Ray Freeman is often cited by papers focused on Advanced NMR Techniques and Applications (168 papers), NMR spectroscopy and applications (157 papers) and Advanced MRI Techniques and Applications (91 papers). Ray Freeman collaborates with scholars based in United Kingdom, United States and South Sudan. Ray Freeman's co-authors include Gareth A. Morris, Ad Bax, Ēriks Kupče, A.J. Shaka, Malcolm H. Levitt, H. D. W. Hill, Geoffrey Bodenhausen, James Keeler, Helen Geen and Peter B. Barker and has published in prestigious journals such as Nature, Chemical Reviews and Journal of the American Chemical Society.

In The Last Decade

Ray Freeman

225 papers receiving 18.4k citations

Hit Papers

Enhancement of nuclear magnetic resonance signals by pola... 1971 2026 1989 2007 1979 1981 1985 1983 1991 500 1000 1.5k
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. Enhancement of nuclear magnetic resonance signals by polarization transfer
    1979 1.6k citations Gareth A. Morris, Ray Freeman Journal of the American Chemical Society profile →
  2. Investigation of complex networks of spin-spin coupling by two-dimensional NMR
    1981 1.1k citations Ad Bax, Ray Freeman Journal of Magnetic Resonance (1969) profile →
  3. Computer-optimized decoupling scheme for wideband applications and low-level operation
    1985 1.0k citations A.J. Shaka, Ray Freeman et al. Journal of Magnetic Resonance (1969) profile →
  4. An improved sequence for broadband decoupling: WALTZ-16
    1983 924 citations A.J. Shaka, Ray Freeman et al. Journal of Magnetic Resonance (1969) profile →
  5. Band-selective radiofrequency pulses
    1991 723 citations Ray Freeman et al. Journal of Magnetic Resonance (1969) profile →
  6. Evaluation of a new broadband decoupling sequence: WALTZ-16
    1983 654 citations A.J. Shaka, Ray Freeman et al. Journal of Magnetic Resonance (1969) profile →
  7. Natural abundance carbon-13-carbon-13 coupling observed via double-quantum coherence
    1980 589 citations Ad Bax, Ray Freeman et al. Journal of the American Chemical Society profile →
  8. Correlation of proton chemical shifts by two-dimensional Fourier transform NMR
    1981 434 citations Ad Bax, Ray Freeman et al. Journal of Magnetic Resonance (1969) profile →
  9. Fourier Transform Study of NMR Spin–Lattice Relaxation by “Progressive Saturation”
    1971 426 citations Ray Freeman, H. D. W. Hill The Journal of Chemical Physics profile →
  10. Suppression of artifacts in two-dimensional J spectroscopy
    1977 397 citations Geoffrey Bodenhausen, Ray Freeman et al. Journal of Magnetic Resonance (1969) profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ray Freeman United Kingdom 68 12.5k 8.2k 5.4k 5.3k 3.2k 227 19.8k
Geoffrey Bodenhausen France 69 17.7k 1.4× 9.5k 1.2× 7.7k 1.4× 5.1k 1.0× 7.5k 2.3× 434 26.8k
Beat H. Meier Switzerland 68 11.5k 0.9× 4.9k 0.6× 8.5k 1.6× 2.6k 0.5× 6.8k 2.1× 417 23.4k
Gareth A. Morris United Kingdom 55 7.1k 0.6× 5.3k 0.6× 3.4k 0.6× 3.3k 0.6× 1.3k 0.4× 283 12.6k
Malcolm H. Levitt United Kingdom 73 15.1k 1.2× 7.7k 0.9× 2.0k 0.4× 3.7k 0.7× 8.8k 2.7× 298 20.1k
Christian Griesinger Germany 79 9.3k 0.7× 2.6k 0.3× 14.2k 2.6× 1.8k 0.3× 4.4k 1.4× 475 25.5k
Richard R. Ernst Switzerland 93 25.4k 2.0× 15.0k 1.8× 18.2k 3.3× 8.5k 1.6× 9.7k 3.0× 307 47.5k
Robert Tycko United States 83 8.5k 0.7× 2.9k 0.4× 14.0k 2.6× 1.7k 0.3× 8.3k 2.6× 246 29.2k
Robert G. Griffin United States 104 26.4k 2.1× 8.9k 1.1× 9.1k 1.7× 3.3k 0.6× 19.1k 5.9× 545 40.0k
A.J. Shaka United States 37 4.3k 0.3× 2.5k 0.3× 4.4k 0.8× 1.7k 0.3× 1.6k 0.5× 95 9.7k
Alfred G. Redfield United States 46 5.3k 0.4× 2.8k 0.3× 3.5k 0.6× 1.6k 0.3× 2.6k 0.8× 130 11.0k

Countries citing papers authored by Ray Freeman

Since Specialization
Citations

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

Fields of papers citing papers by Ray Freeman

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ray Freeman

This figure shows the co-authorship network connecting the top 25 collaborators of Ray Freeman. A scholar is included among the top collaborators of Ray Freeman 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 Ray Freeman. Ray Freeman 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.
Kupče, Ēriks & Ray Freeman. (2006). Fast multidimensional NMR by polarization sharing. Magnetic Resonance in Chemistry. 45(1). 2–4. 112 indexed citations
2.
Barjat, Hervé, et al.. (1999). Suppression of Radiation Damping in High-Resolution NMR. Journal of Magnetic Resonance. 136(1). 114–117. 15 indexed citations
3.
Freeman, Ray. (1998). Spin Choreography. 61 indexed citations
4.
Freeman, Ray. (1998). A physical picture of multiple-quantum coherence. Concepts in Magnetic Resonance. 10(2). 63–84. 12 indexed citations
5.
Freeman, Ray & Ēriks Kupče. (1997). Decoupling: theory and practice I. Current methods and recent concepts. NMR in Biomedicine. 10(8). 372–380. 1 indexed citations
6.
Freeman, Ray, et al.. (1995). A Homonuclear Equivalent of the INEPT Experiment. Simplification of Crowded Proton Spectra and Measurement of Unresolved Couplings. Journal of Magnetic Resonance Series A. 117(1). 128–131. 7 indexed citations
7.
Blechta, Vratislav, Federico del Río‐Portilla, & Ray Freeman. (1994). Long‐range carbon–proton couplings in strychnine. Magnetic Resonance in Chemistry. 32(2). 134–137. 50 indexed citations
8.
Kupče, Ēriks & Ray Freeman. (1993). A new method for assigning carbon connectivities by NMR. Chemical Physics Letters. 204(5-6). 524–528. 2 indexed citations
9.
Blechta, Vratislav & Ray Freeman. (1993). Multi-site Hadamard NMR spectroscopy. Chemical Physics Letters. 215(4). 341–346. 26 indexed citations
10.
McIntyre, Lisa & Ray Freeman. (1992). Accurate measurement of coupling constants by J doubling. Journal of Magnetic Resonance (1969). 96(2). 425–431. 37 indexed citations
11.
Shaka, A.J. & Ray Freeman. (1985). A composite 180° pulse for spatial localization. Journal of Magnetic Resonance (1969). 63(3). 596–600. 20 indexed citations
12.
Shaka, A.J., Christopher J. Bauer, & Ray Freeman. (1984). Selective population transfer effects in nuclear overhauser experiments. Journal of Magnetic Resonance (1969). 60(3). 479–485. 17 indexed citations
13.
Bax, Ad & Ray Freeman. (1981). Investigation of complex networks of spin-spin coupling by two-dimensional NMR. Journal of Magnetic Resonance (1969). 44(3). 542–561. 1111 indexed citations breakdown →
14.
Bax, Ad, Ray Freeman, & Stewart P. Kempsell. (1980). Investigation of 13C13C long-range couplings in natural-abundance samples. Journal of Magnetic Resonance (1969). 41(2). 349–353. 112 indexed citations
15.
Freeman, Ray & Gareth A. Morris. (1978). Experimental chemical shift correlation maps in nuclear magnetic resonance spectroscopy. Journal of the Chemical Society Chemical Communications. 684–684. 200 indexed citations
16.
Bodenhausen, Geoffrey & Ray Freeman. (1978). Correlation of chemical shifts of protons and carbon-13. Journal of the American Chemical Society. 100(1). 320–321. 92 indexed citations
17.
Bodenhausen, Geoffrey, Ray Freeman, & David L. Turner. (1976). Two-dimensional J spectroscopy: Proton-coupled carbon-13 NMR. The Journal of Chemical Physics. 65(2). 839–840. 102 indexed citations
18.
Freeman, Ray, H. D. W. Hill, & Robert Kaptein. (1972). An adaptive scheme for measuring NMR spin-lattice relaxation times. Journal of Magnetic Resonance (1969). 7(1). 82–98. 72 indexed citations
19.
Freeman, Ray & H. D. W. Hill. (1971). High-Resolution Study of NMR Spin Echoes: “J Spectra”. The Journal of Chemical Physics. 54(1). 301–313. 141 indexed citations
20.
Freeman, Ray. (1970). Nuclear Magnetic Double Resonance Studies by the Fourier Transform Technique. The Journal of Chemical Physics. 53(1). 457–458. 23 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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