HRRL Pos Test 26Jul2012 Data Ana com r3686 r3687

comparing r3686 and r3687

NaI right
NaI left
NaI right: in - out
NaI left: in - out

e+ rate

e+ rate on right: 0.3619 Hz

e+ rate on left: 0.05706 Hz

Rough e- rate estimate

[math] I = \frac{Q}{t} = \frac{V}{R}[/math], so [math] Q = \frac{Vt}{R}[/math]

According to: [Calibration]

[math]Vt = 1.201~\mu Vs[/math]

[math] Q = \frac{1.201~\mu Vs}{50 \Omega }[/math] = 24.02 nC

Electron charges per second under 100 Hz reprate is: 100Q/s = 2402 nC/s.

Unit charge: [math]1.602 \times 10^{-19}[/math]C.

Number of electrons per second: [math]\frac{2402~nC/s }{1.602 \times 10^{-19}~C} = 1.5 \times 10^{13} [/math] Hz.

e+/e- ratio

Right: [math]\frac{0.3619~Hz }{1.5 \times 10^{13} ~Hz } = 0.24 \times 10^{-13} = 2.4 \times 10^{-14} [/math]

Left: [math]\frac{0.05706~Hz }{1.5 \times 10^{13} ~Hz } = 0.038 \times 10^{-13} = 3.8 \times 10^{-15} [/math]

You need to require 511s in both detectors using a software cut.

Software cut? What kind of software cut?