Prompt Gamma-Ray Activation Analysis (PGAA) is typically used for the determination of elemental composition and concentration of solid samples(ca. down to ppm range). Liquids and gaseous samples can be also measured.

The PGAA method is based on the neutron capture in nuclei of the sample material and the subsequent detection of prompt gamma-rays emitted during deexcitation of the compound nuclei: AZ(n, γ)A+1Z. With practically the same PGAA set-up (after minor or major changes in electronics or/and shielding and sample chamber), we can make coincidence measurements and position sensitive measurements (currently 1D or 2D scan).