Isotopenanalyse an niederenergetischen Teilchen der Elemente Bor, Kohlenstoff, Stickstoff und Sauerstoff aus der kosmischen Strahlung in Plastik-Detektoren
In eight cellulose nitrate sheets of a plastic detector stack flown in 1968 from Ft. Churchill in 1.8 g/cm2 floating altitude stopping heavy cosmic ray particles of about 100 MeV/Nuc were measured. In 0.2 m2 of the 1.6 m2 large stack 30 boron, 190 carbon, 83 nitrogen and 263 oxygen particles were analysed. A resolution of ΔZ=±0.1 charge units and ΔM=±0.7 mass units was obtained. Using oxygen particles for a calibration at16O the mean values of the mass distributions of the other elements are: 10.79±0.17 for boron, 12.22±0.08 for carbon, 14.61±0.12 for nitrogen.