POSITRON ANNIHILATION SPECTROSCOPY: DIGITAL VS. ANALOG SIGNAL PROCESSING

摘要

Positron annihilation spectroscopy with a variety of techniques is a proven and well-established nuclear method with applications in material research, chemistry, and medicine. Extensions to newer applications and further improvements of all of these applications trigger continuous development of existing techniques. We will present a fully digitized positron lifetime spectrometer, with the capability for the simultaneous recording of time and energy information of gamma rays. Its advantages over a conventional setup employing fast analog nuclear electronics in structural material investigations will be discussed, and the possibilities to employ digital electronics in other PAS techniques and other fields of applications.