World's Best Scientists 2026 revealed!
VIEW LIST
Ralf I. Kaiser

D-Index & Metrics

Chemistry

D-Index
80
Citations
21041
World Ranking
3453
National Ranking
1129

Ralf I. Kaiser 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 Ralf I. Kaiser sits on this spectrum.

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 publications 1,295+

This scientist: 585 publications — 92nd percentile

92% of scientists in this discipline score the same or lower.

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

Ralf I. Kaiser 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 Ralf I. Kaiser sits on this spectrum.

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 D-Index 159+

This scientist: 80 D-Index — 81st percentile

81% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2017 - Fellow of the American Chemical Society
  • 2012 - Fellow of the American Association for the Advancement of Science (AAAS)
  • 2011 - Fellow of American Physical Society (APS) Citation For pioneering experimental investigations of the chemical evolution of the Solar System and the Interstellar Medium, using crossed molecular beams and surface scattering to probe the underlying phenomena on the most fundamental, microscopic molecular level

Overview

Ralf I. Kaiser is affiliated with the University of Hawaii at Manoa in the United States. Their research spans the intersection of physics, astronomy, and chemistry with a focus on molecular-level processes and chemical evolution in space and related environments.

Their main fields of study include Physics and Astronomy and Chemistry. Subfields in which Kaiser has contributed significantly are:

  • Atomic and Molecular Physics, and Optics
  • Astronomy and Astrophysics
  • Spectroscopy
  • Organic Chemistry
  • Atmospheric Science

The scientific topics most frequently addressed in their work include:

  • Advanced Chemical Physics Studies
  • Molecular Spectroscopy and Structure
  • Astrophysics and Star Formation Studies
  • Energetic Materials and Combustion
  • Synthesis and characterization of novel inorganic/organometallic compounds
  • Atmospheric Ozone and Climate
  • Atmospheric chemistry and aerosols

Kaiser's scholarship is published extensively across various venues, with notable frequent publication outlets being:

  • The Journal of Physical Chemistry A
  • Physical Chemistry Chemical Physics
  • The Journal of Physical Chemistry Letters
  • The Astrophysical Journal
  • ChemPhysChem

Among their recent papers are:

  • "An Aromatic Universe-A Physical Chemistry Perspective," 2021, The Journal of Physical Chemistry A
  • "Discovery of two isomers of ethynyl cyclopentadiene in TMC-1: Abundances of CCH and CN derivatives of hydrocarbon cycles," 2021, Astronomy and Astrophysics
  • "Low-temperature gas-phase formation of indene in the interstellar medium," 2021, Science Advances
  • "Exploiting Photoionization Reflectron Time-of-Flight Mass Spectrometry to Explore Molecular Mass Growth Processes to Complex Organic Molecules in Interstellar and Solar System Ice Analogs," 2020, Accounts of Chemical Research
  • "Discovery of fulvenallene in TMC-1 with the QUIJOTE line survey," 2022, Astronomy and Astrophysics

The scientist frequently collaborates with other researchers. Their most common coauthors are:

  • Alexander M. Mebel
  • Zhenghai Yang
  • Chao He
  • Shane J. Goettl
  • Andrew M. Turner

Ralf I. Kaiser has been recognized by major scientific societies and holds fellowships including:

  • Fellow of the American Chemical Society (2017)
  • Fellow of the American Association for the Advancement of Science (AAAS) (2012)
  • Fellow of the American Physical Society (APS) (2011), with a citation for pioneering experimental investigations of the chemical evolution of the Solar System and the Interstellar Medium using crossed molecular beams and surface scattering methods

Best Publications

  • Experimental investigation on the formation of carbon-bearing molecules in the interstellar medium via neutral-neutral reactions.

    Ralf I. Kaiser

  • Low temperature formation of naphthalene and its role in the synthesis of PAHs (Polycyclic Aromatic Hydrocarbons) in the interstellar medium

    D. S. N. Parker;F. Zhang;Y. S. Kim;R. I. Kaiser

  • A Combined Experimental and Theoretical Study on the Formation of the Amino Acid Glycine (NH2CH2COOH) and Its Isomer (CH3NHCOOH) in Extraterrestrial Ices

    Philip D. Holtom;Philip D. Holtom;Chris J. Bennett;Yoshihiro Osamura;Nigel J. Mason

  • ON THE FORMATION OF GLYCOLALDEHYDE (HCOCH2OH) AND METHYL FORMATE (HCOOCH3) IN INTERSTELLAR ICE ANALOGS

    Chris J. Bennett;Ralf I. Kaiser

  • Formation Mechanisms of Naphthalene and Indene: From the Interstellar Medium to Combustion Flames

    Alexander M. Mebel;Alexander Landera;Ralf I. Kaiser

  • Theoretical and Laboratory Studies on the Interaction of Cosmic-Ray Particles with Interstellar Ices. III. Suprathermal Chemistry-Induced Formation of Hydrocarbon Molecules in Solid Methane (CH4), Ethylene (C2H4), and Acetylene (C2H2)

    R. I. Kaiser;K. Roessler

  • Untangling the formation of the cyclic carbon trioxide isomer in low temperature carbon dioxide ices

    Chris J. Bennett;C. Jamieson;Alexander M. Mebel;Ralf I. Kaiser

  • Laboratory Studies on the Irradiation of Methane in Interstellar, Cometary, and Solar System Ices

    Chris J. Bennett;Corey S. Jamieson;Yoshihiro Osamura;Ralf I. Kaiser

  • Mechanistical Studies on the Irradiation of Methanol in Extraterrestrial Ices

    Chris J. Bennett;Shih-Hua Chen;Bing-Jian Sun;Agnes H. H. Chang

  • Formation of Hydrogen, Oxygen, and Hydrogen Peroxide in Electron-irradiated Crystalline Water Ice

    Weijun Zheng;David Jewitt;Ralf I. Kaiser

  • A Combined Experimental and Theoretical Study on the Formation of Interstellar C3H Isomers

    R. I. Kaiser;C. Ochsenfeld;M. Head-Gordon;Y. T. Lee

  • Understanding the kinetics and dynamics of radiation-induced reaction pathways in carbon monoxide ice at 10 K

    Corey S. Jamieson;Alexander M. Mebel;Ralf I. Kaiser

  • Formation of benzene in the interstellar medium

    Brant M. Jones;Fangtong Zhang;Ralf I. Kaiser;Adeel Jamal

  • Hydrogen abstraction/acetylene addition revealed.

    Dorian S. N. Parker;Ralf I. Kaiser;Tyler P. Troy;Musahid Ahmed

  • Formation of complex organic molecules in methanol and methanol–carbon monoxide ices exposed to ionizing radiation – a combined FTIR and reflectron time-of-flight mass spectrometry study

    Surajit Maity;Ralf I. Kaiser;Brant M. Jones

  • Application of Reflectron Time-of-Flight Mass Spectroscopy in the Analysis of Astrophysically Relevant Ices Exposed to Ionization Radiation: Methane (CH4) and D4-Methane (CD4) as a Case Study.

    Brant M. Jones;Ralf I. Kaiser

  • Combined crossed molecular beams and AB initio investigation of the formation of carbon-bearing molecules in the interstellar medium via neutral-neutral reactions

    Ralf I. Kaiser;C. Ochsenfeld;D. Stranges;M. Head-Gordon

  • A combined experimental and computational investigation on the synthesis of acetaldehyde [CH3CHO(X 1A')] in interstellar ices

    Chris J. Bennett;Corey S. Jamieson;Yoshihiro Osamura;Ralf I. Kaiser

  • Reaction dynamics in astrochemistry: low-temperature pathways to polycyclic aromatic hydrocarbons in the interstellar medium.

    Ralf I. Kaiser;Dorian S.N. Parker;Alexander M. Mebel

  • Formation of Nitriles in the Interstellar Medium via Reactions of Cyano Radicals, CN(X 2Σ+), with Unsaturated Hydrocarbons

    N. Balucani;O. Asvany;L. C. L. Huang;Y. T. Lee

  • Water and astrobiology

    Michael J. Mottl;Michael J. Mottl;Brian T. Glazer;Brian T. Glazer;Ralf I. Kaiser;Ralf I. Kaiser;Karen J. Meech;Karen J. Meech

  • Temperature Dependence of the Formation of Hydrogen, Oxygen, and Hydrogen Peroxide in Electron-Irradiated Crystalline Water Ice

    Weijun Zheng;David Jewitt;Ralf I. Kaiser

Frequent Co-Authors

Alexander M. Mebel
Alexander M. Mebel Florida International University
Musahid Ahmed
Musahid Ahmed Lawrence Berkeley National Laboratory
Nadia Balucani
Nadia Balucani University of Perugia
Yuan T. Lee
Yuan T. Lee Academia Sinica
Holger F. Bettinger
Holger F. Bettinger University of Tübingen
Arthur G. Suits
Arthur G. Suits University of Missouri
Henry F. Schaefer
Henry F. Schaefer University of Georgia
Christian Ochsenfeld
Christian Ochsenfeld Ludwig-Maximilians-Universität München
Martin Head-Gordon
Martin Head-Gordon University of California, Berkeley
David Jewitt
David Jewitt University of California, Los Angeles

External Links

Personal website of Ralf I. Kaiser

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Studying Chemistry in the USA opens doors to a variety of exciting career pathways, often complemented by related online degrees. For those interested in healthcare, exploring how do you become a pharmacist provides valuable insight into the education and certification process required for this rewarding profession.

Individuals passionate about forensic science may consider enrolling in an online forensic science degree online program, which offers flexible learning options to gain essential knowledge in crime lab analysis and investigative techniques.

Another niche career involves working as an autopsy technician. If this intrigues you, learning more about autopsy technician school can help clarify educational requirements, job outlook, and salary expectations for this specialized field.

Additionally, for those interested in the psychological aspects of forensic investigations, pursuing an online forensic psychology masters degree can equip you with advanced skills in criminal behavior analysis and profiling, increasing your professional opportunities.

These diverse pathways highlight how chemistry knowledge integrates well with multidisciplinary careers, all achievable through various affordable and accessible online programs.

Best Scientists Citing Ralf I. Kaiser

Nadia Balucani

Nadia Balucani

University of Perugia

Publications: 94

Harold Linnartz

Harold Linnartz

Leiden University

Publications: 68

Alexander M. Mebel

Alexander M. Mebel

Florida International University

Publications: 53

E. F. van Dishoeck

E. F. van Dishoeck

Leiden University

Publications: 48

Cecilia Ceccarelli

Cecilia Ceccarelli

Grenoble Alpes University

Publications: 43

Karin I. Öberg

Karin I. Öberg

Smithsonian Institution

Publications: 37

Michael C. McCarthy

Michael C. McCarthy

Harvard University

Publications: 35

Eric Herbst

Eric Herbst

University of Virginia

Publications: 33

Jean-Christophe Loison

Jean-Christophe Loison

University of Bordeaux

Publications: 32

Piergiorgio Casavecchia

Piergiorgio Casavecchia

University of Perugia

Publications: 31

José Cernicharo

José Cernicharo

Spanish National Research Council

Publications: 31

Daniel M. Neumark

Daniel M. Neumark

University of California, Berkeley

Publications: 23

Stephen R. Leone

Stephen R. Leone

University of California, Berkeley

Publications: 22

David L. Osborn

David L. Osborn

Sandia National Laboratories

Publications: 22

Bertrand Lefloch

Bertrand Lefloch

Grenoble Alpes University

Publications: 21

Arthur G. Suits

Arthur G. Suits

University of Missouri

Publications: 21

Trending Scientists

Hiroshi Kawazoe

Hiroshi Kawazoe

Tokyo Institute of Technology

Karen A. Moxon

Karen A. Moxon

University of California, Davis

Benoit Guieysse

Benoit Guieysse

University of Canterbury

Linda S. Lee

Linda S. Lee

Purdue University West Lafayette

Liqiang Yang

Liqiang Yang

China University of Geosciences

Jason H. Middleton

Jason H. Middleton

University of New South Wales

Sarah Durkin

Sarah Durkin

Cancer Council Victoria

Jane Hillston

Jane Hillston

University of Edinburgh

Lean Yu

Lean Yu

Academy of Mathematics and Systems Science

Viveck R. Cadambe

Viveck R. Cadambe

Pennsylvania State University

José A. Teixeira

José A. Teixeira

University of Minho

Mark Duggan

Mark Duggan

Stanford University

Ajay K. Israni

Ajay K. Israni

University of Minnesota

Jean-Yves Douillard

Jean-Yves Douillard

European Society for Medical Oncology

Thomas Wernberg

Thomas Wernberg

University of Western Australia

Jillian C. Sweeney

Jillian C. Sweeney

University of Western Australia

Related Chemistry Rankings & Guides

2026 Biotechnology Careers: Guide to Career Paths, Options & Salary

2026 Biotechnology Careers: Guide to Career Paths, Options & Salary
2026 How to Become a Coroner: Education, Salary, and Job Outlook

2026 How to Become a Coroner: Education, Salary, and Job Outlook
2026 Is Demand for Forensic Science Degree Graduates Growing or Declining?

2026 Is Demand for Forensic Science Degree Graduates Growing or Declining?
2026 Fastest Online Forensic Science Degree Programs You Can Finish in Under 2 Years

2026 Fastest Online Forensic Science Degree Programs You Can Finish in Under 2 Years
2026 How Fast Can You Get a Forensic Science Degree Online?

2026 How Fast Can You Get a Forensic Science Degree Online?
2026 How to Become a Medical Examiner: Education, Salary, and Job Outlook

2026 How to Become a Medical Examiner: Education, Salary, and Job Outlook
2026 How Much Does a Forensic Science Degree Program Cost? Tuition, Fees & Total Expense Breakdown

2026 How Much Does a Forensic Science Degree Program Cost? Tuition, Fees & Total Expense Breakdown
2026 How Fast Can You Get a Chemistry Degree Online?

2026 How Fast Can You Get a Chemistry Degree Online?
2026 How to Become a Crime Scene Photographer: Education, Salary, and Job Outlook

2026 How to Become a Crime Scene Photographer: Education, Salary, and Job Outlook
2026 How to Become a Medicolegal Death Investigator: Education, Salary, and Job Outlook

2026 How to Become a Medicolegal Death Investigator: Education, Salary, and Job Outlook
2026 Can You Get a Forensic Science Degree Master's Without a Related Bachelor's Degree?

2026 Can You Get a Forensic Science Degree Master's Without a Related Bachelor's Degree?
2026 Online Chemistry Degree Programs Costs: Tuition & Fees

2026 Online Chemistry Degree Programs Costs: Tuition & Fees
2026 Forensic Science Degree Coursework Explained: What Classes Can You Expect to Take?

2026 Forensic Science Degree Coursework Explained: What Classes Can You Expect to Take?
2026 Credit Requirements for a Forensic Science Degree Explained

2026 Credit Requirements for a Forensic Science Degree Explained

Recently Published Articles

2026 What to Expect From Your First Clinical Placement in SLP Graduate School

2026 What to Expect From Your First Clinical Placement in SLP Graduate School
2026 How Fast Can You Get a Mechanical Engineering Degree Online?

2026 How Fast Can You Get a Mechanical Engineering Degree Online?
2026 Substance Abuse Counseling Degree Guide: Costs, Requirements & Job Opportunities

2026 Substance Abuse Counseling Degree Guide: Costs, Requirements & Job Opportunities
2026 Online Applied Behavior Analysis Bachelor's Degree Programs With No Application Fee

2026 Online Applied Behavior Analysis Bachelor's Degree Programs With No Application Fee
2026 How to Become a Sports Agent: Education, Salary, and Job Outlook

2026 How to Become a Sports Agent: Education, Salary, and Job Outlook
2026 What Careers Can You Pursue With a Disability Studies Degree? Salary Potential, Job Outlook, and Next Steps

2026 What Careers Can You Pursue With a Disability Studies Degree? Salary Potential, Job Outlook, and Next Steps
2026 How to Become a Special Education Teacher in North Las Vegas, NV: Education Requirements & Certification

2026 How to Become a Special Education Teacher in North Las Vegas, NV: Education Requirements & Certification
2026 What Prerequisites Do You Need for a Healthcare Administration Degree? Entry Requirements, Credits & Eligibility Rules

2026 What Prerequisites Do You Need for a Healthcare Administration Degree? Entry Requirements, Credits & Eligibility Rules
2026 Competency-Based Online Mathematics Master's Degrees

2026 Competency-Based Online Mathematics Master's Degrees
2026 Most Affordable Online Urban Planning and Development Degree Programs

2026 Most Affordable Online Urban Planning and Development Degree Programs
2026 Fastest Online Architecture Degree Programs You Can Finish in Under 2 Years

2026 Fastest Online Architecture Degree Programs You Can Finish in Under 2 Years
2026 Shortest Online Anthropology Bachelor's Degree Programs That Pay Well: Cost, Time to Completion, and Salary Outlook

2026 Shortest Online Anthropology Bachelor's Degree Programs That Pay Well: Cost, Time to Completion, and Salary Outlook
2026 Cheapest Online Social Work Master's Degrees That Pay Well: Tuition, Duration, and Earnings

2026 Cheapest Online Social Work Master's Degrees That Pay Well: Tuition, Duration, and Earnings
2026 How to Become a Radiology Technician in New Jersey

2026 How to Become a Radiology Technician in New Jersey
2026 Different Types of TESOL & Multilingual Learners Degrees and Their Salaries

2026 Different Types of TESOL & Multilingual Learners Degrees and Their Salaries
2026 How To Become a Nurse Recruiter: Salary & Career Paths

2026 How To Become a Nurse Recruiter: Salary & Career Paths
2026 Best 3-Year Accelerated PsyD Programs

2026 Best 3-Year Accelerated PsyD Programs
2026 Online Computer Science Degree Master's Programs That Accept FAFSA

2026 Online Computer Science Degree Master's Programs That Accept FAFSA
2026 What Jobs Can You Get With a Child Psychology Bachelor's Degree?

2026 What Jobs Can You Get With a Child Psychology Bachelor's Degree?
2026 Best Accredited Online Human Services Bachelor's Degree Programs

2026 Best Accredited Online Human Services Bachelor's Degree Programs
2026 How to Become a Coach/Scout: Education, Salary, and Job Outlook

2026 How to Become a Coach/Scout: Education, Salary, and Job Outlook