Ronald Collé

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Ronald Collé (born February 11, 1946) is a specialist in nuclear and radiochemistry, radionuclidic metrology, and the development of standards. He has worked at the National Institute of Standards and Technology (NIST) from 1976 to 2003 and from 2005 to present, and currently serves as a research chemist in the Radioactivity Group of the NIST Physics Laboratory (Ionizing Radiation Division).[1]

Previously, he held research positions at Brookhaven National Laboratory,[2] and at the University of Maryland, College Park.[3] He received a B.Sc. in chemistry from the Georgia Institute of Technology in 1969, a Ph.D. in chemistry (nuclear and radiochemistry) from Rensselaer Polytechnic Institute in 1972, and an M.S. Adm. (Administration of Science and Technology) from George Washington University in 1979.[1]

Colle and his collaborators have maintained, expanded and improved radioactivity measurement standards for radium-226 and radon-222 to address the requirements to measure these nuclides in drinking water.[4][5] Colle and collaborators developed methods to analyse and standardize brachytherapy sources, pellets of radioactive material designed to be implanted in the body at site requiring direct radiation exposure.[6][7]

An important part of metrology and standards development is understanding and taking into account uncertainties that are inherent in the instruments or that arise from methodology. Colle co-authored a paper with Churchill Eisenhart and Harry Ku,[8] which was the forerunner of the 1993 ISO Guide to the Expression of Uncertainty in Measurement.[9]

Collé has published over ninety research papers, and from 1999 through 2004 was an associate editor of the Journal of Research of the National Institute of Standards and Technology.[10]


  1. ^ a b "Ionizing Radiation Division: Radioactivity Group Technical Activities 2006" (PDF). Bureau International des Poids et Mesures. Retrieved 2007-09-05.
  2. ^ Collé, R.; Kishore, R. (1974). "Excitation functions for (p,n) reactions on ^{79}Br and ^{127}I". Physical Review C. 9 (6): 2166–2170. Bibcode:1974PhRvC...9.2166C. doi:10.1103/PhysRevC.9.2166.
  3. ^ Scholz, W.; Bakhru, H.; Collé, R.; Li-Scholz, A. (1974). "Resonance fluorescence from the 7.08-MeV state in ^{208}Pb". Physical Review C. 9 (4): 1568–1573. Bibcode:1974PhRvC...9.1568S. doi:10.1103/PhysRevC.9.1568.
  4. ^ "Present status of national standards". NIST. Archived from the original on 2007-04-23.
  5. ^ "Modern NIST Certificate". NIST. Archived from the original on 2007-07-01.
  6. ^ Collé, R. (1999). "Chemical digestion and radionuclidic assay of TiNi-encapsulated 32P intravascular brachytherapy sources". Applied Radiation and Isotopes. 50 (5): 811–833. doi:10.1016/s0969-8043(98)00167-5. PMID 10214703.
  7. ^ Coursey, B. M.; Collé, R.; Zimmerman, B. E.; Cessna, J. T.; Golas, D. B. (1998). "National radioactivity standards for beta-emitting radionuclides used in intravascular brachytherapy". International Journal of Radiation Oncology, Biology, Physics. 41 (1): 207–216. doi:10.1016/s0360-3016(98)00012-1. PMID 9588935.
  8. ^ Churchill Eisenhart, Harry H. Ku, and R. Colle, Expression of the Uncertainties of Final Measurement Results: Reprints, NBS Special Publication 644, National Bureau of Standards,Washington, DC (1983).
  9. ^ Leon Jay Gleser, "Assessing Uncertainty in Measurement", Statistical Science, Vol. 13, No. 3 (Aug., 1998), pp. 277-290
  10. ^ "Journal of Research of the National Institute of Standards and Technology Vol. 107, No.3" (PDF). May–June 2002. Retrieved 2007-05-06. Cite journal requires |journal= (help)

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