at.constants# Physical constants Module Attributes e_mass Electron mass [eV] p_mass Proton mass [eV] Cgamma \(C_\gamma\) [m/eV^3] Cq \(C_q\) [m] Cgamma = 8.846273822420375e-32# \(C_\gamma\) [m/eV^3] Cq = 3.831938640038657e-13# \(C_q\) [m] e_mass = 510998.94999999995# Electron mass [eV] p_mass = 938272088.16# Proton mass [eV]