where A is the atomic number and Z is the effective charge of the particle.
1.5.2. Ionization and bremsstrahlung losses for CR electrons
The formulas for the ionization losses of relativistic electrons (in eV/sec) are somewhat different from Eq. 1.5.1 and Eq. 1.5.2 (the difference is mainly associated with the fact that the maximum energy transferred to electron in collisions with electron is ~ E/2):
in atomic hydrogen,
Besides that, owing to their collisions with nuclei and electrons of medium, the electrons lose their energy by production of bremsstrahlung y-quanta (Ginzburg and Syrovatsky, M1963):
8.0 in atomic hydrogen,
Since the bremsstrahlung y-quanta's energy is of the order of the electron energy, the continuous low-portion energy loss is substituted by discrete loss of electrons; it may be assumed in this case that the probability P(s) for an electron to traverse a path s (in g/cm2) is, according to Eq. 1.5.8:
exp(- s/62) in atomic hydrogen.
Was this article helpful?