We have an experimental setup as below, the magnetic field strength, Bq/30s, and distances (magnet distance, Geiger counter height, Geiger to magnet centre distance) have all been recorded. The energy of the particle is also known.
We are trying to calculate the radius of a charged particle in the motion of the magnetic field, in order to prove the mass of an electron using the equation $\ r=mv/qb$.
We have tried using both the formulas for kinetic energy and Einsteins $\ e=mc^2$ in order to solve the mass and radius.
Is there any way to calculate the radius or mass of an electron using this setup? And how? Assuming we can't get any more variables.