In this paper

the detection systems and the data acquisition methods used in the nuclear decay study in our laboratory are introduced. These two detection systems include the low-background Compton-suppressed spectrometer and the three-parameter (γ-γ-t) coincidence system of HPGe-HPGe detectors

both of which are used to measure the γ rays following the nuclear decay. In addition

as examples

the detection of γ rays following the decay of 252Cf spontaneous fission fragments and the β++EC decay of 74As

by using these two spectrometers

is briefly described.