Fit: line + power law + line
Free parameters: 2x boundary points between lines
Algorithm: Nelder-Mead, 20 iterations.

Attach 1: Wave amplitudes. 
Peak at 300 is pulser.
Some physics events in between obvious noise and pulser.
No obvious signal from Bismuth source

Attach 2: Alpha (?) wave sample. Rise time ~ 200 samples.
In spite of no signal from source, some alphas are visible.