A New Method for improving resolution of Nuclear ADC for high resolution Spectroscopy System

Abstract

In this paper, a new method called as dynamic estimation method is proposed that improves the resolution of standard 8K Multichannel analyzer. It is based on the concept of dynamic estimation of peak of the nuclear pulses. Dynamic estimation method is advantageous since it results in reduction of nonlinearity error without increasing the conversion time of existing the spectroscopy systems significantly compared to the existing conventional or digital spectroscopy systems as described in the literature. The system makes use of low-resolution nuclear ADC, which has been designed using any conventional technique to improve its resolution. The circuit has been designed based on the proposed method and has been simulated using Multisim software. Relationship between various parameters like resolution, estimation error and nonlinearity error of the system are discussed and results are presented in the paper.