Energy losses of positive and negative channeled particles

The energy loss of particles channeled through a 2 cm thick Ge crystal at energies of 35, 100 and 250 GeV are reported. The theory of energy losses of particles passing through matter was first developed by Bohr, Bethe, and Bloch. The theory of energy losses of channeled particles was developed to some extent by Lindhard in his seminal 1965 theoretical paper on particle channeling, and more recently it has been dealt with in greater detail by Esbensen and Golovchenko. An outline is presented of the theory of energy loss and how it applies to channeled particles, the experimentally determined parameters of Lindhard's theory, and the minimum energy loss values, and compare these with the theory of Golovchencko and Esbensen.