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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 62 8674 7865 2483 2052 109 40455

P. Jeffrey Hay publications per year

The chart shows the history of publications by P. Jeffrey Hay between 1971 and 2023, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. P. Jeffrey Hay published across 53 years, from 1971 to 2023, averaging 3.1 papers a year. Output peaked at 12 publications in 1978. 1 of the 165 publications appeared in the last two years.

No. of publications
5 10
Bar chart. Horizontal axis: year, 1971 to 2023. Vertical axis: number of publications, 0 to 12. Peak 12 publications in 1978. 1971: 4 publications 1972: 4 publications 1973: 6 publications 1974: 3 publications 1975: 3 publications 1976: 11 publications 1977: 10 publications 1978: 12 publications 1979: 8 publications 1980: 2 publications 1981: 3 publications 1982: 5 publications 1983: 5 publications 1984: 3 publications 1985: 6 publications 1986: 2 publications 1987: 3 publications 1988: 1 publication 1989: 2 publications 1990: 2 publications 1991: 2 publications 1992: 3 publications 1993: 3 publications 1994: 2 publications 1995: 3 publications 1996: 1 publication 1997: 4 publications 1998: 2 publications 1999: 4 publications 2000: 3 publications 2001: 1 publication 2002: 4 publications 2003: 2 publications 2004: 6 publications 2005: 9 publications 2006: 3 publications 2007: 4 publications 2008: 8 publications 2009: 0 publications 2010: 0 publications 2011: 1 publication 2012: 2 publications 2013: 1 publication 2014: 0 publications 2015: 0 publications 2016: 0 publications 2017: 0 publications 2018: 0 publications 2019: 0 publications 2020: 0 publications 2021: 1 publication 2022: 0 publications 2023: 1 publication
1971 2023

165 publications in total across all disciplines

View publications per year as a table
P. Jeffrey Hay: publications per year, 1971 to 2023
Year Publications
1971 4
1972 4
1973 6
1974 3
1975 3
1976 11
1977 10
1978 12
1979 8
1980 2
1981 3
1982 5
1983 5
1984 3
1985 6
1986 2
1987 3
1988 1
1989 2
1990 2
1991 2
1992 3
1993 3
1994 2
1995 3
1996 1
1997 4
1998 2
1999 4
2000 3
2001 1
2002 4
2003 2
2004 6
2005 9
2006 3
2007 4
2008 8
2009 0
2010 0
2011 1
2012 2
2013 1
2014 0
2015 0
2016 0
2017 0
2018 0
2019 0
2020 0
2021 1
2022 0
2023 1
Total 165
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P. Jeffrey Hay publications per year - data summary

  • P. Jeffrey Hay, a Chemistry scholar from Los Alamos National Laboratory, has 165 publications recorded across 53 years, from 1971 to 2023.
  • The oldest publication on record dates to 1971 and the most recent to 2023.
  • The most productive year is 1978, with 12 publications.
  • The least productive years with any output are 1988, 1996, 2001, 2011 and others, with 1 publication each.
  • 10 of the 53 years in the span carry no publications at all (2009, 2010, 2014, 2015 and others).
  • The rate of publication averages 3.1 papers per year over the whole span, or 3.8 per year counting only the 43 years with at least one publication.
  • The last 5 years on the chart (2019-2023) hold 2 publications, 1% of the career total.
  • Split into equal eras - 1971-1988: 91 publications (5.1 per year); 1989-2006: 56 publications (3.1 per year); 2007-2023: 18 publications (1.1 per year).
  • Comparing the opening and closing eras, the overall trend of publication is declining.

P. Jeffrey Hay publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where P. Jeffrey Hay sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 101–120 publications, is where this scientist sits. 61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61–80 publications 1,295+

This scientist: 109 publications — 3rd percentile

3% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623 109
121–140 918
141–160 1,218
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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P. Jeffrey Hay publication distribution in Chemistry in 2026 - data summary

  • The chart plots the publication count of all 17,934 Chemistry scientists ranked by Research.com in 2026, grouped into 63 ranges running from 61–80 to 1,295+ publications.
  • P. Jeffrey Hay, a Chemistry scholar from Los Alamos National Laboratory, records 109 publications - the 3rd percentile of the discipline.
  • 3% of ranked Chemistry scientists score the same or lower than P. Jeffrey Hay, and about 97% score higher.
  • The median of the discipline falls in the 241–260 publications range, and P. Jeffrey Hay ranks below the median.
  • The most crowded range is 161–180 publications, holding 1,350 scientists (8% of the field).
  • 77% of the field sits in the lowest quarter of the value range (up to 361–380 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 1,295 publications or more, 100 scientists in all (<1% of the field).

P. Jeffrey Hay D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where P. Jeffrey Hay sits on this spectrum.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 62–63 D-Index, is where this scientist sits. 40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40–41 D-Index 159+

This scientist: 62 D-Index — 52nd percentile

52% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834 62
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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P. Jeffrey Hay D-index placement in Chemistry in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 17,934 Chemistry scientists ranked by Research.com in 2026, grouped into 61 ranges running from 40–41 to 159+ D-Index.
  • P. Jeffrey Hay, a Chemistry scholar from Los Alamos National Laboratory, records 62 D-Index - the 52nd percentile of the discipline.
  • 52% of ranked Chemistry scientists score the same or lower than P. Jeffrey Hay, and about 48% score higher.
  • The median of the discipline falls in the 62–63 D-Index range, and P. Jeffrey Hay falls inside that same range.
  • The most crowded range is 56–57 D-Index, holding 1,051 scientists (6% of the field).
  • 70% of the field sits in the lowest quarter of the value range (up to 70–71 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 159 D-Index or more, 98 scientists in all (<1% of the field).

Research.com Recognitions

  • 2008 - Fellow of the American Association for the Advancement of Science (AAAS)

Overview

P. Jeffrey Hay is affiliated with Los Alamos National Laboratory in the United States. Their research spans multiple disciplines, including medicine, chemistry, and physics and astronomy. The scientist's work notably covers both broad and specialized topics within these fields.

Their publication record includes work in the following main fields of study:

  • Medicine
  • Chemistry
  • Physics and Astronomy

They have also contributed to several subfields, such as:

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Anesthesiology and Pain Medicine
  • Emergency Medicine
  • Cardiology and Cardiovascular Medicine

Topics addressed in their research include:

  • History and advancements in chemistry
  • Various Chemistry Research Topics
  • Advanced Chemical Physics Studies
  • Airway Management and Intubation Techniques
  • Cardiac Arrest and Resuscitation
  • Cardiac, Anesthesia and Surgical Outcomes

The scientist has published in at least one venue, contributing work to the Journal of Paramedic Practice.

The recent paper by P. Jeffrey Hay is:

  • Prehospital anaesthesia by a helicopter emergency medicine service: a review (2023), Journal of Paramedic Practice

P. Jeffrey Hay has collaborated with several co-authors across their publications, including:

  • Thom H. Dunning
  • Ronan O'Neill
  • Andrew Topping
  • Darren Monaghan
  • Glenn O'Rorke

The scientist has been recognized with professional honors and is a Fellow of the American Association for the Advancement of Science (AAAS), awarded in 2008.

Best Publications

  • <i>Ab initio</i> effective core potentials for molecular calculations. Potentials for K to Au including the outermost core orbitals

    Unknown

  • <i>Ab initio</i> effective core potentials for molecular calculations. Potentials for main group elements Na to Bi

    Unknown

  • Orbital interactions in metal dimer complexes

    P. Jeffrey Hay;Jack C. Thibeault;Roald Hoffmann

  • Revised Basis Sets for the LANL Effective Core Potentials.

    Lindsay E. Roy;P. Jeffrey Hay;Richard L. Martin

  • Theoretical Studies of the Ground and Excited Electronic States in Cyclometalated Phenylpyridine Ir(III) Complexes Using Density Functional Theory

    P. Jeffrey Hay

  • Gaussian Basis Sets for Molecular Calculations

    Unknown

  • Generalized valence bond description of bonding in low-lying states of molecules

    William A. Goddard;Thom H. Dunning;William J. Hunt;P. Jeffrey Hay

  • Hydrolysis of ferric ion in water and conformational equilibrium

    Richard L. Martin;P. Jeffrey Hay;Lawrence R. Pratt

  • Theoretical study of CeO2 and Ce2O3 using a screened hybrid density functional

    P. Jeffrey Hay;Richard L. Martin;Jamal Uddin;Gustavo E. Scuseria

  • Density functional calculations on first‐row transition metals

    Thomas V. Russo;Richard L. Martin;P. Jeffrey Hay

  • Theoretical Studies of the Properties and Solution Chemistry of AnO22+and AnO2+Aquo Complexes for An = U, Np, and Pu

    P. Jeffrey Hay;Richard L. Martin;Georg Schreckenbach

  • Configuration interaction studies of O3 and O+3. Ground and excited states

    P. Jeffrey Hay;Thom. H. Dunning;William A. Goddard

  • Geometries and energies of the excited states of O3 from ab initio potential energy surfaces

    P. Jeffrey Hay;Thom. H. Dunning

  • Density functional calculations on actinide compounds: Survey of recent progress and application to [UO2X4]2− (X=F, Cl, OH) and AnF6 (An=U, Np, Pu)

    Georg Schreckenbach;P. Jeffrey Hay;Richard L. Martin

  • Relativistic contributions to the low‐lying excitation energies and ionization potentials of the transition metals

    Richard L. Martin;P. Jeffrey Hay

  • Synthesis of imido analogs of the uranyl ion.

    Trevor W. Hayton;James M. Boncella;Brian L. Scott;Phillip D. Palmer

  • Theoretical studies of the structures and vibrational frequencies of actinide compounds using relativistic effective core potentials with Hartree–Fock and density functional methods: UF6, NpF6, and PuF6

    P. Jeffrey Hay;Richard L. Martin

  • The A 2Π–X 2Σ+ red and B 2Σ+–X 2Σ+ violet systems of the CN radical: Accurate multireference configuration interaction calculations of the radiative transition probabilities

    Peter J. Knowles;Hans‐Joachim Werner;P. Jeffrey Hay;David C. Cartwright

  • Organometallic uranium(V)-imido halide complexes: from synthesis to electronic structure and bonding.

    Christopher R. Graves;Ping Yang;Stosh A. Kozimor;Anthony E. Vaughn

  • Quantum chemical studies of acid sites in zeolite ZSM-5

    Antonio Redondo;P. Jeffrey Hay

  • The covalent and ionic states of the rare gas monofluorides

    Thom H. Dunning;P. Jeffrey Hay

  • Effective Core Potentials for DFT Calculations

    Thomas V. Russo;Richard L. Martin;P. Jeffrey Hay

  • Polarization CI wavefunctions: the valence states of the NH radical

    P. Jeffrey Hay;Thom. H. Dunning

Frequent Co-Authors

Richard L. Martin
Richard L. Martin Los Alamos National Laboratory
Brian L. Scott
Brian L. Scott Los Alamos National Laboratory
David Clark
David Clark University of Glasgow
Jaqueline L. Kiplinger
Jaqueline L. Kiplinger Los Alamos National Laboratory
Rinaldo Poli
Rinaldo Poli Laboratoire de Chimie de Coordination
Bruce E. Bursten
Bruce E. Bursten University of Tennessee at Knoxville
Enrique R. Batista
Enrique R. Batista Los Alamos National Laboratory
David E. Morris
David E. Morris Los Alamos National Laboratory
Eric J. Schelter
Eric J. Schelter University of Pennsylvania
Georg Schreckenbach
Georg Schreckenbach University of Manitoba

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