In DEAP this parameter is called Fprompt. Nuclear recoil type events have high Fprompt (~0.7) values while electronic recoil events have a low Fprompt value (~0.3).
The parameter Fprompt in DEAP is essential for identifying distinct event categories. Events with substantial nuclear recoil energies typically display higher Fprompt values (around 0.7), whereas those involving minimal electronic energy exhibit lower Fprompt values (approximately 0.3).