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Kinematic compensation in penetration of ions in matter

A variation in the method of transmission measurement of energy loss of charged particles in self-supported films is suggested. The method consists of detecting the particles scattered and transmitted through the same film placed at an angle with respect to the incident beam. The extremities of the energy distribution of the scattered particles provide information of the energy loss along the incident and the scattered channel. The determination of these energy edges requires correction for straggling and for system resolution. This is done by making use of the kinematic compensation effect as a function of rotation of the target orientation. A theoretical simulation of this method is made for alpha particles in the MeV range penetrating aluminium films, utilising the stopping power values of current theories. Preliminary experimental results are given in support of the general trends expected.