[math]p_e = 14 \frac{MeV}{c} = 7.47 \cdot 10^{-21} \frac{m\cdot kg}{s}[/math]
[math]B = \frac{p_e}{q_e \cdot R}[/math]
[math]1T=\frac{kg}{C\cdot s}[/math], [math]q_e = 1.6\cdot 10^{-19} C[/math]
[math]B(T) = \frac{4.67\cdot 10^{-2}}{R(m)}[/math]