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Division Spotlight
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
Meeting Spotlight
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Nuclear Science and Engineering
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Fusion Science and Technology
Latest News
Uncertainty contributes to lowest uranium spot prices in 18 months
A combination of plentiful supply and uncertain demand resulted in spot pricing for uranium closing out March below $64 per pound, with dips down to about $63.50 during mid-March—the lowest futures prices in 18 months, according to tracking by analysis firm Trading Economics. Spot prices have also fallen steadily since the beginning of 2024. Meanwhile, long-term prices have held steady at about $80 per pound at the end of March, according to Canadian front-end uranium mining, milling, and conversion company Cameco.
J. Guasp, F. Castejón, I. Pastor, R. F. Álvarez-Estrada
Fusion Science and Technology | Volume 72 | Number 2 | August 2017 | Pages 99-119
Technical Paper | doi.org/10.1080/15361055.2017.1320497
Articles are hosted by Taylor and Francis Online.
The inverse problem for Thomson scattering (TS), that is, finding the electron distribution function (EDF), not restricted to be Maxwellian or isotropic, from the observation of the scattered spectrum, is addressed. Based on previous results by the authors, a new parallel FORTRAN code, INVERT, has been developed that allows to estimate the free parameters of a wide class of distribution functions by fitting experimental or numerical (synthetic) spectra using a variant of the simplex method. The application of these techniques to the extraction of non-Maxwellian or anisotropic features in the electron distribution function is analyzed in detail. The performance of the new code on noisy synthetic spectra and its capabilities to quantitatively discriminate among several competing EDFs modeling data are discussed. The issues of uniqueness (or nonuniqueness) of the inverse problem in case of multiparameter distribution functions are discussed. In such cases, the prospects of multiple diagnostics synthesis, or having several simultaneous scattering chords to remove the ambiguity in the reconstruction of the EDF, are also discussed. Some comments on the requirements of a TS system able to detect nonthermal or anisotropic effects are also included.