A simple digital TDPAC spectrometer

We present a simplified digital time differential perturbed γ???γ angular correlation (TDPAC) spectrometer that demonstrates that such instruments can be built using primarily commercial components and with relatively modest coding effort. The system handles data rates of 70 kcps/detector with a timing resolution of better than 500 ps, and has been used with both ¹¹¹In and ¹⁸¹Hf.