David Griscom

David Griscom

David L. Griscom, Ph.D. Physicist, Consultant

Hermosillo Area, Mexico

Current
  • Principal at impactGlass research international
Past
  • Adjunct Professor of Materials Science and Engineering at University of Arizona
  • Visiting Professor of Research at Université Jean Monnet, Saint-Étienne
  • Visiting Professor of Research at Université Claude Bernard Lyon 1

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Education
  • Brown University
  • Carnegie Mellon University
  • Wilkinsburg High School
Recommended
David has 4 recommendations 4 people have recommended David
Connections
124 connections
Industry
Research

David Griscom’s Summary

I have discovered and/or extensively characterized virtually all known intrinsic and extrinsic radiation-induced point defects in pure and B-, Ge-, and P-doped silica (glassy SiO2), alkali borate and silicate glasses, and heavy-metal fluoride glasses by means of electron spin resonance (ESR) spectrometry. Most significantly, I've discovered and characterized by ESR and optical methods the most fundamental defects in silica glass, the self-trapped holes (STHs). I've also made profound experimental and mathematical contributions the study of the ferromagnetic resonance (FMR) of ferro- or ferri-magnetic particles precipitated in glasses, including lunar-soil glasses. Of great importance to both ESR and FMR, I derived (apparently for the first time) a closed-form expression for the temperature dependence of the ESR (or FMR) intensity for any value of the electronic spin S of isolated ions (or the calculated effective spin J of ferro-/ferri-magnetic particles of any given diameter) -- this solution turning out to comprise a linear combination of the Brillouin function and its first and second derivatives. I've also elucidated the roles of radiolytic atomic hydrogen and STHs in the post-irradiation buildup of interface states in MOS transistors (the fundamental elements in most computer chips) and developed the mathematics of fractal kinetics, demonstrating its governing role in the radiation-induced creation and thermal decay of point defects in pure- and doped-silica optical fibers subjected to ionizing radiations. More recently, I've made highly innovative contributions to the geology of major impacts on the earth.

I am principal author of 109 of my 188 published works, a body which is highly cited by my peers according to my score (h=39) on the Hirsch index: http://en.wikipedia.org/wiki/Hirsch_number

Download my full resume: http://www.drivehq.com/file/df.aspx/publish/dlgriscom/GriscomResume

David Griscom’s Specialties:

• Interpretation of Electron Spin Resonance spectra of glassy materials.
• Defect centers in glassy silica.
• Radiation effects in optical fibers.
• Theory and practical application of fractal kinetics to radiation-damage processes in glasses.
• I have amassed evidence that about 10,000 km2 of the US Mid-Atlantic Coastal Plain is blanketed by ejecta from the 35.4-million-year old, 90-km-diameter crater buried beneath the Chesapeake Bay:
http://www.chesapeakebaycraterejecta.com/index.html

David Griscom’s Experience

  • Principal

    impactGlass research international

    (Research industry)

    January 2001 — Present (8 years 11 months)

    Consulting:
    Radiation effects and defect centers in silica glass and silica-based optical fibers, heavy-metal fluoride glasses, and glasses for immobilization of nuclear wastes. Ferromagnetic resonance of small-particle precipitates in glasses. Fractal kinetics of radiation-induced defect creation and decay in optical fibers.

    Ongoing Research:
    (1) I've recently completed my 10-year-overdue manuscript treating my 1999 ESR studies of then-17-yr-old Pu-238-substituted candidate nuclear waste glasses fabricated at Pacific Northwest National Laboratory (74 pages double spaced, including 15 figures). Having now incorporated my coauthor's updates and suggestions, I've submitted it to J. Non-Crystalline Solids.
    (2) Innovative contributions to the geology, petrology, and materials science of major impacts on the Earth. See in particular:
    http://www.chesapeakebaycraterejecta.com/index.html
    (3) Collaboration with scientists worldwide on radiation-induced defects in amorphous SiO2 (most recently with Anatoly Trukhin of the University of Latvia.)

  • Adjunct Professor of Materials Science and Engineering

    University of Arizona

    (Educational Institution; Higher Education industry)

    July 2004 — 2005 (1 year )

    I was officially appointed to this position, but the budgeted 1/4-time Arizona state funding failed to come through ...which was just as well, since I spent the first half of the academic year working to avert the re-election of George W. Bush and the second half working to expose poll-worker fraud in Tucson, a microcosm of the means by which Karl Rove stole the presidency for Dubya a second time. I've published the latter story as a chapter in the book edited by Mark Crispin Miller, "Loser Take All -- Election Fraud and the Subversion of Democracy, 2000-2008" (as of the morning of 10/23/08 Amazon.com Sales Rank: #448 in all Books, #1 in Books > Nonfiction > Current Events > Conspiracy Theories' #2 in Books > Nonfiction > Government > Elections, #2 in Books > Nonfiction > Politics > Political Parties). Unfortunately, my chapter was redacted by the publisher to make it more reader-friendly to those without strong mathematical backgrounds. However, the uncut version including the results of my original binomial analysis can be downloaded here:
    http://www.drivehq.com/folder/p3538015/011809844.aspx

  • Visiting Professor of Research

    Université Jean Monnet, Saint-Étienne

    (Higher Education industry)

    April 2004 — May 2004 (2 months)

    I spent 6 weeks at the Laboratoire Hubert Curien with a congenial and scientifically excellent research group currently specializing in radiation effects in optical fibers. I felt so comfortable there that I actually delivered three PowerPoint lectures in French (an ability I had discovered I possess only one year previously), and I even got out my English-French dictionary to translate the slides for one of them (though strictly unnecessary).

  • Visiting Professor of Research

    Université Claude Bernard Lyon 1

    (Research industry)

    May 2003 — May 2003 (1 month)

    Short stays such as this result when university money for the purpose happens to coincide with the convenience of a potential visitor; in this case we happened to be living in Paris that year. There are never any prescribed duties, so I insisted in giving 3 lectures at the university (and also one at Ecole Normale Superieure de Lyon). At my last university lecture, some new faces turned up in the seminar room, and one of them gave a talk following mine, also on defects in silica glass. These were two professors from the University of St-Etienne and some of their grad students, one of whom, Sylvan Girard, was the second speaker. This felicitous meeting ultimately led to my serving on Sylvain's Ph.D. thesis jury, and later on I agreed to be a reporter on the thesis of Kader Médjahdi. I was also later invited for a 6-week invited professor of research stint at Université Jean Monnet Saint-Étienne in 2004 (see above).

  • Visiting Professor of Research

    Tokyo Institute of Technology

    (Research industry)

    June 2001 — March 2002 (10 months)

    I performed self-directed basic research, mainly related to self-trapped holes in silica, at TIT's Materials and Structures Laboratory. I analyzed and published those data two years later. While at TIT, I presented several PowerPoint lectures there and elsewhere in Japan, including three talks at the International Symposium on New Prospects of ESR Dosimetry and Dating in Osaka.

    The Osaka conference was run by Prof. Motoji Ikeya of Osaka University, who consented to having his students use the marvelous scanning-ESR "macroscope" that he had developed to run a telling experiment on one of the rocks that I argue are ejecta from the Chesapeake Bay crater. Relevant to the very same story, Prof. Ken-Ichi Kondo, whose office was a few floors above mine at TIT, agreed to have his students run an experimental shocking experiment that appears to show that ferric oxyhydroxides can be vitrified by shock waves. Unfortunately, I haven't yet found a way to do proper materials science on this unique sample. (If anyone should be interested, I would be happy to provide a portion of the sample.)

  • Visiting Professor of Research

    Université Pierre et Marie Curie - Paris 6

    (Higher Education industry)

    May 2000 — May 2001 (1 year 1 month)

    Actually, my stint at Universite de Paris 6/Laboratoire de Minéralogie et Cristallographie de Paris was broken up into 3 stays totaling only 4 months, during which I performed self-directed research employing ESR to probe impact debris in Cretaceous-Tertiary(KT)-boundary rocks with the objects of (1) better understanding various material phases generated in the impact process on time scales of minutes to hours and (2) developing ESR evidence for changes in sea-water chemistry and species extinctions on time scales of hundreds to thousands of years above and below this signal geologic time horizon.

    By extraordinary coincidence there was another visiting professor there also using ESR to study KT-boundary materials. Surely we were the only two scientists in the world doing this at this time! Fortunately for both of us though, Pavle Premovic (Department Head at the University of Nis, Serbia) was looking at entirely different set of paramagnetic species than I was, and we were able to amicably share both spectrometer time and samples. We became great pals!

  • Research Physicist

    Naval Research Laboratory

    (Government Agency; Research industry)

    December 1967 — January 2001 (33 years 2 months)

    Research Physicist, Solid State Division (renamed and re-purposed the Optical Sciences Division in 1979)

    Official Duties of my Position (PD):
    Initiate, plan, and execute basic research on the physics of optical materials (with specialization in electron spin resonance of amorphous insulators), interpret obtained experimental data in terms of contemporary physical theories or new theories of the incumbent's own devising, and publish these results and analyses in refereed journals, conference proceedings, and/or books.

    Unofficial Duty (not in my PD):
    Bring in contracts from external agencies equal to my salary plus overhead (total = 200% of salary)

    Major Accomplishments (Official Duties):
    164 of my 188 published papers and virtually all accomplishments mentioned in the Summary, other than my pre-1968 borate-glass work at Brown University and my post-2000 impact-geology work, were realized at NRL. Two patents.

    Minor Failure (Unofficial Duty):
    Between 1991 and 2001 the $666,000 in external funding I raised was deemed insufficient by my managers.

  • PI, DOE Sponsored Prog: Chem Decomposition of High-Level Nuc Waste Storage Glasses under Irradiation

    Naval Research Laboratory

    (Government Agency; Research industry)

    January 1997 — December 1999 (3 years )

    Total funding: $487 K. I think I didn't quite deliver their money's worth at the time. However, I've recently made amends by spending about 500 hours of my unpaid retirement time analyzing certain 10-year-old data relevant to this project and writing up the very instructive story that finally emerged. With the originator of the hyper-ingenious samples, Bill Weber, as coauthor, I've submitted the resulting manuscript for publication in J. Non-Crystalline Solids under the title: "Electron Spin Resonance Study of Fe3+ and Iron-Group Ion Clusters in 17-Year-Old Nuclear-Waste-Glass Simulants Containing PuO2 with Different Degrees of 238Pu Substitution."

  • Fulbright-Garcia Robles Fellow

    Universidad Nacional Autónoma de México (UNAM)

    (Higher Education industry)

    May 1997 — July 1997 (3 months)

    The J. William Fulbright Foreign Scholarship Program is administered by the U.S. Information Agency in order "to increase mutual understanding between the people of the United States and the people of other countries by means of educational and cultural exchanges."

    I worked with the late Virgilio Beltran Lopez at the Instituto de Ciencias Nucleares at UNAM, utilizing his ESR spectrometer to study rocks from the Cretaceous-Tertiary Boundary. I am the lead author of 3 major publications founded on the things Virgilio and I accomplished in these 3 short months, especially, “New geochemical insights from electron-spin-resonance studies of Mn2+ and SO3- in calcites: Quantitative analyses of Chicxulub crater ejecta from Belize and southern México with comparisons to limestones from distal Cretaceous-Tertiary-boundary sites,” D.L. Griscom, V. Beltrán-López, K.O. Pope, A.C. Ocampo, in Impact Markers in the Stratigraphic Record, Impact Studies 3, C. Koeberl, F. Martínez-Ruiz, Eds. (Springer Verlag, Heidelberg, 2003) pp. 229-270.

  • PI, DOE Sponsored Program: Radiation Hardened Fiber Optics for Fusion Reactor Diagnostic Systems

    Naval Research Laboratory

    (Government Agency; Research industry)

    August 1992 — May 1993 (10 months)

    Total funding: $125 K. By my reckoning (and that of my peeved bosses who had to pick up my salary when I didn't have outside funding), I delivered far more than the DOE paid for here. I developed and heavily employed an innovative CCD-camera prism spectrometer (idea and prototype due to Charles Askins) to record simultaneously the optical transmission of 4 silica-core/F-doped-silica-clad/Al-jacketed fiber-optic coils and their pigtails (differing one from the other in their OH, Cl, and F contents) and 4 reference fibers (identical fibers but pigtails only, without coils) during continuous fixed-dose-rate gamma irradiation of the coils in NRL's "swimming pool" source at selected times stretching from 30 seconds to 6 months -- an unusual capability that revealed unexpected defect-related optical bands, the relationships they may have to the anionic impurities, and their creation and decay kinetics. I had reason to believe that a fiber with an F-doped silica core might be superior and so should be one of the 4 tested, but because no such fiber was commercially available I contracted with Konstantin Golant at the Fiber Optic Research Center in Moscow to fabricate this fiber using an F-doped-silica core rod from Japanese industry kindly provided by Hideo Hosono at Tokyo Institute of Technology. (I believe this to have been the first ever contract issued by NRL to an entity of the former-Soviet Union.) My data reduction procedure consisted of transferring hundreds of raw CCD-camera transmitted-light "streaks" onto spreadsheets where I converted them to gamma-ray-induced visible/infra-red spectral loss in dB/km vs wavelength in nm. Several of the 7 papers I principally authored that presented, analyzed, and interpreted these data are still widely cited by researchers around the world seeking to find out if a sufficiently rad-hard optical fiber really can be developed for use in or near a functioning fusion reactor.

  • Program Manager

    DARPA

    (Government Agency; Defense & Space industry)

    January 1981 — December 1983 (3 years )

    I worked at the Defense Advanced Research Projects Agency (DARPA) in Arlington, VA, on a voluntary half-time assignment from the Naval Research Laboratory. There, I managed approximately $4,000,000 in basic research contracts with U.S. Department of Defense, industrial, and university laboratories. I approved and funded about two dozen new research proposals, and I conceived and arranged the realization of the DARPA Workshop on Diamond-Like Carbon Coatings held April 1982 in Albuquerque, NM.

    One of the programs that I inherited from a former incumbent of my desk at the Defense Sciences Office was the infamous space-laser program. I was so underwhelmed by what I was shown during a site visit that I had thoughts of canceling the program ...a decision that was lifted from my shoulders shortly thereafter by Congress' passing of a line-item continuation of this historically unsuccessful program.

  • Sabbatical

    Université Claude Bernard Lyon 1

    (Research industry)

    September 1975 — August 1976 (1 year )

    I took sabbatical leave from the Naval Research Laboratory to spend a year at Université Claude Bernard Lyon 1, FRANCE. I picked Lyon because I had struck up friendships with faculty members and students of the university's Département de Physique des Matériaux while attending a 1973 NATO Summer School in Corsica. However, by the time I arrived there, everyone was involved with completing theses (I served on the jury of the late Jacques Pivot), moving into new buildings, and/or wiring up a Van de Graff accelerator down in the basement. Little chance for me to do hands-on research. So, besides giving several seminars there (as well as in Paris, Strasbourg, and Toulouse), I wrote two lengthy review articles, one an invited chapter on the atomic structure of borate glasses (which, following a proposition by Norbert Kreidl, was exposed IN ADVANCE to all attendees of the first Conference on Boron in Glass and Glass Ceramics held at Alfred University in 1977, where I was the keynote speaker ...reviewing the works of these very attendees!). The other review treated an immense literature of experimental data and theoretical calculations that had all of a sudden popped into existence (like the "big bang") regarding the electronic structures of both crystalline and glassy polymorphs of silicon dioxide. While this field has advanced considerably since then, I believe that my 80-page treatise likely remains a standard reference for students and researchers just entering the field.

  • Principal Investigator, NASA Lunar Sample Program

    Naval Research Laboratory

    (Government Agency; Research industry)

    June 1971 — January 1973 (1 year 8 months)

    By the time NASA accepted my proposal to perform ESR studies of glassy materials returned from the Moon, it had already funded 2 other groups to do the same, and arguments over the nature of the so-called "characteristic resonance" of the lunar soils were raging. I first thought it was paramagnetic but finally had to agree with one of the other PIs that it is due to FERROmagnetic resonances. But FMR of what? I decided that my co-investigators and I should try to simulate this resonance by creating a suite of simulated lunar glasses in the laboratory (under correct redox conditions) and then subjecting them to various treatments designed to mimic lunar surface processes. We finally concluded that 15 to 80% of the "characteristic resonance" was due to single-domain (SD) metallic iron particles precipitated in glasses and attributed the rest to SD magnetite. Our biggest successes were (1) creating a simulated lunar glass with an FMR spectrum exactly matching the bizarre spectrum of an Apollo 11 black glass chip, (2) theoretically explaining the spectra of (1) as due to 2-domain metallic iron, (3) Chuck Marquardt's and my experimental evidence for a new mechanism of lunar-surface maturation darkening, (4) our virtually perfect experimental mimicking of the FMR spectra of lunar volcanic glasses by sub-solidus oxidation of the simulated glasses, and (5) my theoretical explanations of the (contrasting) temperature dependencies of the FMR intensities and linewidths of SD iron and magnetite particles. Unfortunately for us, the volcanic glasses were not widely recognized as such at the time, so our excellent evidence for precipitated magnetite in the Apollo 15 green glass spherules (which history will surely agree with) was regarded by the mandarins of the time as evidence of "high bias and incompetence." Thus our renewal proposal was rejected. Still, we published 20 papers on ESR/FMR of lunar materials in refereed journals & conference proceedings, many of them seminal.

  • National Research Council Postdoctoral Research Associate

    Naval Research Laboratory

    (Government Agency; Research industry)

    December 1967 — April 1969 (1 year 5 months)

    Jim Schulman, then Acting Director of Research at NRL, had conceived a program to study the fundamental physics and chemistry of glasses and was actively searching for candidates for NRL-NRC Posdoctoral Associates in this area. Several grad-school buddies of mine at Brown had already been appointed NRL-NRC Associates (though not all in Jim's program), so I threw in my application and research proposal, and it was readily accepted as fitting in very well with Jim's vision. This resulted in a virtually seamless continuation of kinds of glass research I had begun at Brown, i.e., exploiting the ESR technique to study radiation-induced paramagnetic defects and transition-group ions in glasses. Although my post-doc was good for 2 full years, I was converted to a regular employee of the Solid State Division after 17 months (I couldn't understand why, since I viewed myself as inferior to virtually all my new colleagues).

  • Post Doc

    Brown University

    (Educational Institution; Higher Education industry)

    August 1966 — November 1967 (1 year 4 months)

    I wrote a couple papers based on some of the research I did in grad school that didn't make it into my thesis, including one with my brother Robert, who as an employee of IBM was able to use one of their "main frames" to do some heavy duty theoretical computations to underpin my interpretations of my electron spin resonance (ESR) data for Mn2+ ions in lithium borate glasses and polycrystalline compounds. Amazingly (and without precedent!) Phil Bray took his name off that one because he decided he didn't have enough to do with it. (I gave a talk on this subject at the Joint Meeting of the American, Mexican, and Canadian Physical Societies held Mexico City 1966.)

    During this time I also advised and/or collaborated with some of Phil's remaining grad students who were using ESR to study paramagnetic defects in glasses, particularly Craig Taylor whose ESR (and NMR) line-shape-simulation computer program was indispensable to morphing the art of powder-pattern -- and "glass-pattern"! -- analyses into true science. (As for me, I never learned to program anything larger than an HP hand calculator. So I ended up using Craig's program for nearly two decades on the Naval Research Laboratory's main-frame computer ...before finally switching to an equivalent program originated by Joe Friebele for use on PCs.)

  • Selectee, Summer Development Program

    Texas Instruments

    (Public Company; TXN; Semiconductors industry)

    June 1961 — August 1961 (3 months)

    As one of the selected applicants for TI's Summer Development Program, I was placed in TI's Information and Components Laboratory in Dallas, TX, where I was assigned to "learn on the job" by aiding regular employees in developing high-speed circuitry (the target then was 100 MHz) for digital applications, including frequency counters and variable-time-delay pulsers. The circuits I worked on, including a couple I designed myself, utilized transistors and tunnel diodes.

  • Summer Student

    Westinghouse Research and Development Center

    (Public Company; Oil & Energy industry)

    June 1959 — August 1959 (3 months)

    This time I worked not in East Pittsburgh but at the then-recently opened Westinghouse Research and Development Center in Churchill, PA. It was only a mile from our home, so I walked to work. I worked under Dr. R.J. Sladek, mostly designing, building, and testing apparatus to measure the Hall coefficient and magneto-resistance of n-type germanium at temperatures 1-4 K and magnetic fields up to 2.8 Tesla, with the object of finding evidence for the supposed existence of impurity bands. I also designed and made working drawings for a sample holder for an elasto-resistance experiment on n-type InSb. It became clear that neither experiment was possible without pushing the available measuring instruments to their absolute limits, something that didn't quite happen during my 3 months there.

  • Summer Student

    Westinghouse Electric Company

    (Public Company; Oil & Energy industry)

    June 1957 — September 1957 (4 months)

    I worked as a helper in the Switchgear Division of Westinghouse's East Pittsburgh plant. My mentor was S.D. Silliman, who was working on switching devices incorporating the newly-available transistors. I rode to work with my dad, S.B. Griscom, who was an Electrical Engineer in the Electric Utility Engineering Division. Silliman, bless his heart, thought I made a big enough contribution that summer to add my name to a patent he filed and was eventually granted. I felt so undeserving that I lost the patent number, and never tried to look it up back when it still would have been easy enough to find.

David Griscom’s Education

  • Brown University

    Ph.D. , Physics , 1960 — 1966

    My thesis advisor was the late Phillip J. Bray, who earned his Ph.D. under Nobel Prize winner Norman Ramsey at Harvard. At Brown, Phil set up a magnetic resonance laboratory (NMR, PQR, and ESR) dedicated to glassy materials. By the time I joined his group, he was Chairman of the Physics Department and directing as many as 15 graduate students. Predictably, he was unable to provide quality guidance to so many students, particularly those doing ESR, the technique he knew the least about. So my de facto advisor became the late Sook Lee, a gruff, but brilliant and highly driven North Korean post doc had who dodged the draft during the Korean War and became translator for the first American troops to enter his town. Sook's advice was valuable, but none of the 5 or 6 projects I launched seemed important enough to me for a thesis. And since I deplored the thought of writing a patchwork thesis, it took me 6 years and a serious bout of depression to finally pick a thesis topic and realize it.

    Activities and Societies:
    Intramural softball and soccer ... AND free-for-all ice hockey practice! (Gosh, I had a terrible time learning to skate though.)

  • Carnegie Mellon University

    B.S. , Physics , 1956 — 1960

    Although I was also accepted at other places, I picked Carnegie Tech largely because it was near home; (in fact I had taken art classes there every Saturday morning while in high school). I thought I wanted to major in geology, but when I learned it wasn't on the curriculum I selected physics. My grades weren't so great, partly because I was a slow learner, partly because I was too lazy to memorize things the nights before exams, and partly because there were 5 or 6 geniuses in our class who skewed "the curve."

    Activities and Societies:
    Theta Xi Fraternity (elected president my senior year), Newman Club, ROTC (2 years), intramural table tennis and badminton

  • Wilkinsburg High School

    Diploma , English, Physics, Chemistry, Biology, Algebra, Trigonometry, History, Civics, Spanish, Gym, Shop , 1953 — 1956

    Gosh, we had great teachers! From the sound of things (and from our exposure to our daughter's high school teachers), American kids don't get nearly as good public-school educations nowadays.

    Activities and Societies:
    Spanish Club, (no sports; I was a total wimp who stayed at home and built model airplanes and trains)

Additional Information

David Griscom’s Interests:

Physics of radiation-induced defects in glassy materials. Geology of asteroidal and cometary impacts on the Earth. Exposing election theft in the U.S. and seeking to put an end to it. Researching 9/11 truth. Tracking the implosion of the economy and identifying the responsible parties. Reading Science magazine every week for 40 years.

David Griscom’s Groups:

Fellow American Physical Society, Fellow American Association for the Advancement of Science, Fellow American Ceramic Society and past Chair of its Glass & Optical Materials Division, member Geological Society of America, life member Fulbright Association, Co-Founder Americans United for Democracy, Integrity, and Transparency in Elections (AUDIT AZ), member Coordinating Council Election Defense Alliance (EDA: http://www.electiondefensealliance.org/)

  •    Carnegie Mellon Alumni
  •    Brown Alumni Association (BAA)
  •    Petroleum Explorationists / Geologists / Geophysicists
  •    Structural Geology Professionals
  •    Geologist Network
  •    Marquis Who's Who in America
  •    Rock Physics
  •    Alumni of the Department of Physics, Brown University

David Griscom’s Honors:

Winner of the 1974 Washington Academy of Sciences Scientific Achievement Award in Physical Sciences, the 1993 N.F. Mott Award sponsored by the Journal of Non-Crystalline Solids, the 1995 Otto Schott Award offered by the Carl-Zeiss-Stiftung (Germany), a 1996 Outstanding Graduate School Alumnus Award at Brown University, and the 1997 Sigma Xi Pure Science Award at the Naval Research Laboratory. Also in 1997, Fulbright-García Robles Fellow at Universidad Nacional Autónoma de México (see above).

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