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Björn O. Roos

Björn O. Roos

Lund University
Sweden

D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Chemistry 97 1429 20 363 57412

Björn O. Roos publications per year

The chart shows the history of publications by Björn O. Roos between 1961 and 2016, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Björn O. Roos published across 56 years, from 1961 to 2016, averaging 6.5 papers a year. Output peaked at 78 publications in 1997. 1 of the 365 publications appeared in the last two years.

No. of publications
25 50 75
Bar chart. Horizontal axis: year, 1961 to 2016. Vertical axis: number of publications, 0 to 78. Peak 78 publications in 1997. 1961: 1 publication 1962: 0 publications 1963: 1 publication 1964: 1 publication 1965: 0 publications 1966: 1 publication 1967: 0 publications 1968: 0 publications 1969: 0 publications 1970: 1 publication 1971: 3 publications 1972: 3 publications 1973: 2 publications 1974: 2 publications 1975: 3 publications 1976: 2 publications 1977: 4 publications 1978: 1 publication 1979: 3 publications 1980: 3 publications 1981: 9 publications 1982: 8 publications 1983: 8 publications 1984: 3 publications 1985: 2 publications 1986: 6 publications 1987: 6 publications 1988: 7 publications 1989: 7 publications 1990: 8 publications 1991: 4 publications 1992: 9 publications 1993: 21 publications 1994: 10 publications 1995: 14 publications 1996: 12 publications 1997: 78 publications 1998: 9 publications 1999: 10 publications 2000: 8 publications 2001: 4 publications 2002: 5 publications 2003: 12 publications 2004: 12 publications 2005: 11 publications 2006: 9 publications 2007: 8 publications 2008: 11 publications 2009: 12 publications 2010: 9 publications 2011: 1 publication 2012: 0 publications 2013: 0 publications 2014: 0 publications 2015: 0 publications 2016: 1 publication
1961 2016

365 publications in total across all disciplines

View publications per year as a table
Björn O. Roos: publications per year, 1961 to 2016
Year Publications
1961 1
1962 0
1963 1
1964 1
1965 0
1966 1
1967 0
1968 0
1969 0
1970 1
1971 3
1972 3
1973 2
1974 2
1975 3
1976 2
1977 4
1978 1
1979 3
1980 3
1981 9
1982 8
1983 8
1984 3
1985 2
1986 6
1987 6
1988 7
1989 7
1990 8
1991 4
1992 9
1993 21
1994 10
1995 14
1996 12
1997 78
1998 9
1999 10
2000 8
2001 4
2002 5
2003 12
2004 12
2005 11
2006 9
2007 8
2008 11
2009 12
2010 9
2011 1
2012 0
2013 0
2014 0
2015 0
2016 1
Total 365
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Björn O. Roos 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 Björn O. Roos 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, 361–380 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: 363 publications — 75th percentile

75% 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
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
361–380 522 363
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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Björn O. Roos 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 Björn O. Roos 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, 96–97 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: 97 D-Index — 92nd percentile

92% 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
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 97
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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Overview

Björn O. Roos was affiliated with Lund University in Sweden during their academic career. The available information indicates a focus on scholarly work within an academic environment, but specific research areas or main fields of study are not documented here.

No records of published papers, including titles, years, or venues, are provided for this scientist. Similarly, there is no detailed information on frequent co-authors or typical publication venues.

The data does not include any books published by Björn O. Roos, nor are there documented main topics or subfields of study associated with their work. Additionally, there are no listed awards or recognitions received during their career.

The scientist is noted as deceased. The profile is therefore presented in past tense and reflects only the available factual information without evaluative commentary.

Best Publications

  • A complete active space SCF method (CASSCF) using a density matrix formulated super-CI approach

    Björn O. Roos;Peter R. Taylor;Per E.M. Si≐gbahn

  • Second-order perturbation theory with a complete active space self-consistent field reference function.

    Kerstin Andersson;Per‐Åke Malmqvist;Björn O. Roos

  • Second-order perturbation theory with a CASSCF reference function

    Kerstin. Andersson;Per Aake. Malmqvist;Bjoern O. Roos;Andrzej J. Sadlej

  • Software news and update MOLCAS 7 : The Next Generation

    Francesco Aquilante;Luca De Vico;Nicolas Ferré;Giovanni Ghigo

  • Density matrix averaged atomic natural orbital (ANO) basis sets for correlated molecular wave functions

    Kristine Pierloot;Birgit Dumez;Per-Olof Widmark;Björn O. Roos

  • Molcas: a program package for computational chemistry.

    Gunnar Karlström;Roland Lindh;Per-Åke Malmqvist;Björn O Roos

  • The Complete Active Space Self‐Consistent Field Method and its Applications in Electronic Structure Calculations

    Björn O. Roos

  • The multi-state CASPT2 method

    James Finley;Per-Åke Malmqvist;Björn O. Roos;Luis Serrano-Andrés

  • Main group atoms and dimers studied with a new relativistic ANO basis set

    Björn O. Roos;Roland Lindh;Per-Åke Malmqvist;Valera Veryazov

  • The complete active space SCF (CASSCF) method in a Newton–Raphson formulation with application to the HNO molecule

    Per E. M. Siegbahn;Jan Almlöf;Anders Heiberg;Björn O. Roos

  • The restricted active space (RAS) state interaction approach with spin-orbit coupling

    Per Åke Malmqvist;Björn O. Roos;Bernd Schimmelpfennig

  • New relativistic ANO basis sets for transition metal atoms.

    Björn O. Roos;Roland Lindh;Per-Ake Malmqvist;Valera Veryazov

  • Determinant based configuration interaction algorithms for complete and restricted configuration interaction spaces

    Jeppe Olsen;Björn O. Roos;Poul Jo;rgensen

  • A modified definition of the zeroth-order Hamiltonian in multiconfigurational perturbation theory (CASPT2)

    Giovanni Ghigo;Björn O. Roos;Per-Åke Malmqvist

  • The CASSCF state interaction method

    Per-Åke Malmqvist;Björn O. Roos

  • Multiconfigurational perturbation theory with level shift — the Cr2 potential revisited

    Björn O. Roos;Kerstin Andersson

  • A Comparison of the Super-CI and the Newton-Raphson Scheme in the Complete Active Space SCF Method

    Per Siegbahn;Anders Heiberg;Björn Roos;Bernard Levy

  • Does density functional theory contribute to the understanding of excited states of unsaturated organic compounds

    David J. Tozer;Roger D. Amos;Nicholas C. Handy;Bjorn O. Roos

  • Towards an accurate molecular orbital theory for excited states: Ethene, butadiene, and hexatriene

    Luis Serrano‐Andrés;Manuela Merchán;Ignacio Nebot‐Gil;Roland Lindh

  • Cholesky Decomposition-Based Multiconfiguration Second-Order Perturbation Theory (CD-CASPT2): Application to the Spin-State Energetics of Co(III)(diiminato)(NPh).

    Francesco Aquilante;Per-Åke Malmqvist;Thomas Bondo Pedersen;Abhik Ghosh

Frequent Co-Authors

Manuela Merchán
Manuela Merchán University of Valencia
Laura Gagliardi
Laura Gagliardi University of Chicago
Roland Lindh
Roland Lindh Uppsala University
Luis Serrano-Andrés
Luis Serrano-Andrés University of Valencia
Andrzej J. Sadlej
Andrzej J. Sadlej Nicolaus Copernicus University
Ulf Ryde
Ulf Ryde Lund University
Kristine Pierloot
Kristine Pierloot KU Leuven
Mats Olsson
Mats Olsson University of Gothenburg
Enrique Ortí
Enrique Ortí University of Valencia
Geerd H. F. Diercksen
Geerd H. F. Diercksen Max Planck Society

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Related Online Degrees & Career Pathways

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Best Scientists Citing Björn O. Roos

Laura Gagliardi

Laura Gagliardi

University of Chicago

Publications: 167

Henry F. Schaefer

Henry F. Schaefer

University of Georgia

Publications: 132

Donald G. Truhlar

Donald G. Truhlar

University of Minnesota

Publications: 111

Roland Lindh

Roland Lindh

Uppsala University

Publications: 105

Yaoming Xie

Yaoming Xie

University of Georgia

Publications: 104

Leticia González

Leticia González

University of Vienna

Publications: 100

Andrzej J. Sadlej

Andrzej J. Sadlej

Nicolaus Copernicus University

Publications: 89

Manuela Merchán

Manuela Merchán

University of Valencia

Publications: 89

Luis Serrano-Andrés

Luis Serrano-Andrés

University of Valencia

Publications: 84

Todd J. Martínez

Todd J. Martínez

Stanford University

Publications: 83

Massimo Olivucci

Massimo Olivucci

University of Siena

Publications: 79

Frank Neese

Frank Neese

Max Planck Society

Publications: 77

Marco Garavelli

Marco Garavelli

University of Bologna

Publications: 74

Liviu F. Chibotaru

Liviu F. Chibotaru

KU Leuven

Publications: 70

Markus Reiher

Markus Reiher

ETH Zurich

Publications: 63

Liviu Ungur

Liviu Ungur

National University of Singapore

Publications: 60

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