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Radiation Protection Dosimetry 34:13-16 (1990)
© 1990 Oxford University Press

Ultra Heavy Ion LET Determination with Solid State Nuclear Track Detectors

C. Domingo, C. Baixeras, F. Fernández and A. Vidal-Quadras

The Ultra Heavy Cosmic Ray Experiment, on board the LDEF spacecraft, will provide the first statistically significant sample of relativistic Z ( 65 cosmic ray ions. This information is essential in order to determine the cosmic ray flux of such particles. If we know the linear energy transfer (LET) of these particles, it is possible to calculate their contribution to the total dose to which an in-orbit experiment or a manned space mission will be exposed. Solid state nuclear track detector stacks can give us information about the LET of ultra heavy ions in a particular environment. Several polycarbonate and polyethylene teraphtalate (PET) stacks have been exposed in an accelerator to different ultra heavy beams for calibration. A study of LET has been carried out and it has been found that some corrections to the classical expression should be introduced in order to reproduce the experimental data.


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