Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Svetlana Nour (Fed)

I am a radiochemist trained in developing/optimizing radioanalytical methods for radioactivity analyses quantifying radionuclide massic activities in different matrices.

I used and optimized over the years a range of radiochemical techniques for separation of radionuclides from a wide variety of matrices (from pure solution to complex environmental and biological samples). Those includes:

  • different techniques of samples dissolution such as fusion, total acid dissolution/decomposition, and leaching.
  • radiochemical separation of radionuclides (precipitation, co-precipitation, anion-exchange, and chromatographic separation);
  • alpha spectrometry including source preparation (co-precipitation and electrodeposition), and spectrum analysis using different approaches and software such as Genie-2000, Alpha Vision, and ROI method.
  • beta spectrometry based on Liquid Scintillation Counting (LSC) and Proportional Counting techniques including source preparation, efficiency calibration, and data evaluation.
  • gamma spectrometry including calibration of gamma detectors with a wide range of matrices (from pure solution to complex matrices and phantoms).

Within the Radioactivity Group's efforts in developing Standard Reference Materials (SRM) I am actively involved in International Laboratory Intercomparison projects to certify Natural Certified Reference Materials and to determine radioactive impurities in pure SRMs.

I am actively involved in two Proficiency Testing (PT) Programs: the Radiological Traceability Program (RTP) between the DOE Reference Laboratory, the Radiological and Environmental Sciences Laboratory (RESL); and NIST Radiochemistry Intercomparison Program (NRIP) by preparing and characterizing performance testing materials and conducting measurement traceability evaluations of participating radianalytical laboratories.


Toward a New Primary Standardization of Radionuclide Massic Activity Using Microcalorimetry and Quantitative Milligram-Scale Samples

Ryan P. Fitzgerald, Bradley Alpert, Dan Becker, Denis E. Bergeron, Richard Essex, Kelsey Morgan, Svetlana Nour, Galen O'Neil, Dan Schmidt, Gordon A. Shaw, Daniel Swetz, R. Michael Verkouteren, Daikang Yan
We present a new paradigm for the primary standardization of radionuclide activity per mass of solution (Bq/g). Two key enabling capabilities are 4π decay

Limits on Strongly Interacting Sub-GeV Dark Matter from the PROSPECT Reactor Antineutrino Experiment

Hans Pieter Mumm, Denis E. Bergeron, Mark Tyra, Jerome LaRosa, Svetlana Nour, M Andriamirado, A.B. Balantekin, H.R. Band, C.D. Bass, D. Berish, N.S. Bowden, J.P. Brodsky, C.D. Bryan, T. Classen, A.J. Conant, G. Deichert, M.V. Diwan, M.J. Dolinski, A. Erickson, B.T. Foust, J.K. Gaison, A. Galindo-Uribarri, C.E. Gilbert, B.W. Goddard, B.T. Hackett, S. Hans, A.B. Hansell, K.M. Heeger, D.E. Jaffe, X. Ji, D.C. Jones, O. Kyzylova, C.E. Lane, T.J. Langford, B.R. Littlejohn, X. Lu, J. Maricic, M.P. Mendenhall, A.M. Meyer, R. Milincic, I. Mitchell, P.E. Mueller, J. Napolitano, C. Nave, R. Neilson, J.A. Nikkel, D. Norcini, J.L. Palomino, D.A. Pushin, X. Qian, E. Romero-Romero, R. Rosero, P.T. Surukuchi, R.L. Varner, D. Venegas-Vargas, P.B. Weatherly, C. White, J. Wilhelmi, A. Woolverton, M. Yeh, A. Zhang, C. Zhang, X. Zhang
If dark matter has mass lower than around 1 GeV, it will not impart enough energy to cause detectable nuclear recoils in many direct-detection experiments
Created October 3, 2019, Updated June 15, 2021