K-shell fluorescence yields of barium and lanthanum

摘要

K-shell fluorescence yields for barium and lanthanum have been measured adopting simple 2π geometrical configuration and employing a weak ~(57)Co radioactive source. A scintillation spectrometer with an Nal(Tl) detector of dimensions 44.5 mm diameter x 50 mm thickness was employed for the detection and measurement of radiation. The results obtained are in good agreement with the best-fitted values of Hubbell et al. (1994) and also with the other experimental values, indicating that our simple method can be extended to determine fluorescence parameters of high Z materials.