# Beta decay experiment

1. Jan 19, 2010

### rp8308

this isnt actually a homework question im just interested in doing it for an experiment im running.

basically im using different aluminium plates inbetween a GM counter and 204 Tl beta source.

I've already ran the experiment and have a number of readings, ive plotted them together on a graph and its given me a nice exponential graph with a beta range of about 200-250mg/cm2 in the aluminium.

iv just had some sort of mental block, but i cant seem to work out how to find the beta maximum energy from my results? or a beta energy spectrum in that case. i can obviously work it out using mass and decay formulae, however is there a way to find the maximum beta energy from its range in the material?

cheers