On gating selection and background subtraction for discrete -ray spectroscopy

We propose to study the impact of gate width selection on γ -ray spectrum parameters such as peak-to-background ratio and statistics. We will approach this study on both theoretical and experimental point of view. Starting from the results of this preliminary study a new method of background subtraction has been elaborated. It is designed to remove efficiently contamination and continuum component in γ -ray spectrum. These works will be illustrated more specifically in the case of superdeformation for the 151Tb nucleus.