Abstract
A simple and direct method has been developed to measure the K, L and higher shell photoionisation cross-sections of elements in the range 57≤ Z≤68 at 59.5 keV. The K and L i ( i=1, α, β, γ) X-ray intensities emitted by these elements, from irradiating their samples by the photons of above energy, are measured using a Si(Li) spectrometer system. The Kα and L i X-ray fluorescence cross-sections of the above elements are determined, and the total, K and L shell photoelectric cross-sections are evaluated. The present experimental results are in agreement with the theoretical values.
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