2012AnnihCountrRateEstimate
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Rate Estimates
Previous experiment at the IAC
NaI rate Ratio of positron to electron beam
Assumed Geometry
Assume a 2 mm thick Tungsten target that is 1" square
The target is located at -80 < Z < -80.2 The NaI crystal is 2.32" or 56.49 mm in diameter The NaI crystal is 8" from the target then the opening angle is atan(2.32/8/2) = 8.25 degrees