Abstract

Some response characteristics of high resolution gamma-ray spectrometers at high count rates (up to 5–6 · 10¹ cps) are described. It was shown that the resulting time of a conventional multichannel analyzer coupled to a Wilkinson type analog-to-digital converter is composed of the non-extended and extended dead times. Therefore, the peak intensities in a gamma-ray spectrum measured with and without pile-up rejector are function of the lower level discriminator settings.

Keywords:

• accuracy
• gamma spectrometers
• multichannel analyzers
• neutron activation analysis