Abstract
Time Differential gamma-gamma Perturbed Angular Correlation spectroscopy has traditionally been done using scintillation detectors along with constant-fraction discriminators, spectroscopy amplifiers, single channel analyzers, and time to amplitude detectors. We describe a new generation spectrometer where these electronics are replaced by high speed digital transient recorders that record the output from each scintillation detector. The energy and time-of-arrival of gamma rays in any detector can be determined accurately. Many experimental difficulties related to electronics are eliminated; the number of detectors can be increased with no increase in complexity of the apparatus; coincidences among any two detectors are measurable; and coincidences separated by as little as a ns are detectable in principle within one detector. All energies are collected, and energy windows are imposed by software filtering, permitting both high energy resolution and high data-gathering power.
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