Improvements of 60keV -ray spectrum by reducing scattering effects

A considerable reduction of background and an improvement of spectra of low-energy γ-rays, measured with a planar high-purity Ge detector, has been achieved using a small source and a careful design of collimators and shielding. The aim of the design was to reduce strongly the detection of scattered radiation. The design of the shielding was based on previous studies by the present authors of effects of near-source scattering on photon spectra....