Bragg’s additivity rule

For gas targets (atomic and molecular) the theory yields quite reasonable predictions of proton stopping cross sections as compared with experiment. Moreover, since chemical binding effects are naturally incorporated in the theory, the construction of tables of the velocity-dependence of CAB contributions to 5 for different compounds allows - once and for all - the estimate of 5 for protons in materials with similar CAB components without resource to Bragg s additivity rule. 

In the case of molecules, the method for determining is based on Bragg s additivity rule, according to which22... 

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