Neutron Activation Products from Project Sedan in Plants and Soils
1966
Romney, E. M. | Rhoads, W. A.
Neutron activation products of tungsten, scandium, and antimony were among those radionuclides concentrated through roots of plants grown on ejecta from the Sedan thermonuclear cratering detonation. Nuclear reactor-produced isotopes were used in corroborative experiments to investigate, in greater detail, their behavior in plants and soils. Radiotantalum was also included as a matter of academic interest. Plants concentrated more Sc⁴⁶, Sb¹²⁴, and W¹⁸⁵ in leaves than in stems, whereas Ta¹⁸² was concentrated more in stems. Plant uptake of Sc⁴⁶, Sb¹²⁴, and W¹⁸⁵ was Influenced by different types of soil. Scandium-46 and Ta¹⁸² were virtually immobile in columns of soil leached with 76 cm of water while Sb¹²⁴ and W¹⁸⁶ moved readily in neutral and alkaline soil, but not in acidic soil. Their behavior was influenced by the kind of clay mineral present, the sodium and potassium content, and the soil pH.
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