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2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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Latest News
Darleane C. Hoffman, transuranium element pioneer, dies at age 98
Hoffman
Nuclear chemist Darleane D. Hoffman, who was renowned for her research on transuranium elements that advanced the understanding of nuclear fission, died on September 4 at her home in Menlo Park, Calif. She was 98.
Iowa origins: Hoffman was born on November 8, 1926, in Terril, Ia. She attended Iowa State University, where she earned a bachelor’s degree in chemistry in 1948 and a doctorate in physical (or nuclear) chemistry in 1951. She then began working as a chemist at Oak Ridge National Laboratory.
Los Alamos research: In 1953, Hoffman began a research position at Los Alamos National Laboratory, where she conducted pioneering work on spontaneous fission. She served as the lab’s first female division leader in charge of the Chemistry and Nuclear Chemistry Division.
S. G. Lee, J. G. Bak, S. H. Seo, J. H. Choi, J. Hong
Fusion Science and Technology | Volume 39 | Number 1 | January 2001 | Pages 233-236
Poster Presentations | doi.org/10.13182/FST01-A11963449
Articles are hosted by Taylor and Francis Online.
Langmuir probe data were measured in the edge of the central cell plasma of the Hanbit magnetic mirror device. The data were obtained during radio frequency discharge plasma operation. Up to 200 kW heating power was applied at 3.75 MHz. Ion saturation current measurements from three fixed probe arrays were made for intercomparison of the edge plasma density profiles. In addition, measurements of the electron temperature, electron density and floating potential were made in a radial scan of the edge plasma using a movable triple Langmuir probe. The experimental results from these probe measurements are described.
