Complex sentence: The width of the peaks is determined by the resolution of the detector, a very important characteristic of gamma spectroscopic detectors, and high resolution enables the spectroscopist to separate two gamma lines that are close to each other.
Split into simpler sentences: The width of the peaks is determined by the resolution of the detector, a very important characteristic of gamma spectroscopic detectors. High resolution enables the spectroscopist to separate two gamma lines that are close to each other.