Aperture doesn't matter. The gammas that make those bright pixels will comfortably penetrate the shutter, lens, and the entire camera body. It's the time betwee

Aperture doesn't matter. The gammas that make those bright pixels will comfortably penetrate the shutter, lens, and the entire camera body. It's the time between erase and readout that matters, as you say, and it will act as a 4pi dipole detector.