The use of coded aperture masks in low energy gamma-ray astronomy

In order to make a significant step forward in the low energy γ-ray astronomy, a telescope with high sensitivity and fine angular resolution with imaging capability down to a few tenths of a degree is required. The coded aperture mask used together with a position sensitive detector make possible the achievement of these capabilities. Laboratory tests of the position sensitive sodium iodide detection system and the expected performance of the coded imaging mask derived from simulations are presented