A novel method for determining the K-absorption edge using bremsstrahlung radiation

Here we present a novel method for determining the K-absorption edge of heavy elements using continuous bremsstrahlung radiation produced by a weak beta source. The spectrum of the radiation transmitted through an elemental target is recorded by a HPGe detector. The sharp discontinuity observed in the spectrum is identified as the absorption-edge energy. The experimental technique is easily implemented in undergraduate laboratories because only one source of beta particles and only one target foil for each element are required.