Published On Feb 03, 2012 | Issue 4E | Volume 16 2011

NEUTRON ACTIVAT ION ANALYSIS OF SEDIMENT STA NDARDS

H. Widyatmoko
Jurusan Teknik Lingkungan, Universitas Trisakti, Jl. Kyai Tapa no. 1, Jakarta 11440
Abstract

Instrumental neutron activation analysis (INAA) is based on the irradiation of samples in a reactor neutron flux and the measurementof induced radioactivity using high-resolution gamma ray spectrometry. The technique has good sensitivity for a wide range of elements,including many of the first row transition elements, rare earths, alkali, and alkaline earths. When coupled with X-ray fluorescenceanalysis, the two techniques provide excellent data for studying minor variations among geochemically coherent pairs of elements; forexample, yttrium and the rare earth elements, zirconium-hafnium, niobium-tantalum, uranium-thorium. The method has been appliedto geochemical and soil studies.

Key words: INAA, irradiation, radioactivity, gamma ray

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