Now playing · 03 Nuclear

Counting statistics

σ = 100.0 counts

σ=N,%SD=100/N,t=N/R\sigma=\sqrt{N},\quad \%\mathrm{SD}=100/\sqrt{N},\quad t=N/R

Poisson: σ = √N, %SD = 100/√N. Time to reach a %SD at rate R.

Laser