Basically having a problem when trying to theoretically calculate the mass of alpha particle in a charged field.
r is the unknown radius of curvature
m = mass of an alpha particle (6.646 *10^-27 kg)
v = velocity of an alpha particle immediatly after decay (1.381 *10^7 m/s)
q = charge of an alpha particle (3.2 *10^-19 C)
B = magnetic field strength (0.005 Tesla)
The Attempt at a Solution
Answer should be around 1cm but instead value is around 79cm. What's going wrong, am I forgetting something obvious. 1cm is published everywhere and was similar to my experimental results.