Relativistic 5 rays may lead to detector response functions,both in charge and energy,which are different from those expected for unaccompanied particles.These effects are particularly noticable for cosmic ray nuclei with large charge number,Z.We shall demonstrate some of these features with balloon-borne data obtained with the TRACER instrument,and compare the measurement with Monte Carlo calculations.Our results illustrate how delta-ray effects can lead to false charge assignments or acceptance efficiencies if not properly taken into account,but also how they can be helpful in extending the energy response of some of the counter elements.
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