Table 1 Parameter values of the digitizer chain

Single event processing parameters

Background noise level

461 kHz

Crystal blurring

11.2% @ 511 keV

Detection efficiency

86.5%

Temporal resolution

220 ps

Pile-up

5.9 ps

Deadtime

5.9 ps

Energy window

449.68–613.20 keV

Coincidence builder

Coincidence window

2.0115 ns

Delayed window offset

100 ns