Bloch correction at high velocity | ||
| Journal of College of Education for Pure Science | ||
| Article 1, Volume 2, Issue 1, March 2012, Pages 249-267 | ||
| Authors | ||
| Hadi Wali Saheb; Sana Thamer Kadhem; Saher Mezehar Meteshar | ||
| Abstract | ||
| One of the needs of various accelerators to stimulate recent developments in calculating the energy loss of charged particles in matter is heavy ion ionization energy loss. Bloch incorporates Bethe and Bohr theory in a very transparent way. Thus, Bloch found the bridging formulation between the classical Bohr impact – parameter approach, and the quantized Bethe momentum transfer approach to energy loss. In this paper, the behavior of Bloch correction of protons in Aluminum (Al) and Gold (Au) has been studied as well as Bloch correction have also been measured of protons and alpha particles in Nitrogen (N). We have described an implementation of Bloch correction to stopping power (dE⁄dx) in order to take into account the deviations from the Bethe theory at (non – relativistic) and (relativistic) velocities as well as the effects at ultra – relativistic velocities. Bloch correction is expressed in terms of the transport cross section for electron – ion scattering and dependence on the scattering phase shifts. | ||
| Keywords | ||
| Bloch correction | ||
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