Joint controlled transport of Rn evidenced in the Gavnunim syenite at Makhtesh Ramon, Israel using the ''on surface covered alpha track'' (OSCAT) method

The On Surface Covered Alpha Track (OSCAT) method consists of setting cups with SSNTD detectors directly on the exposed surface. The detectors are covered by polyester foil in order to minimize the dilution of radon with air. The results in the Gavnunim area clearly show that the joint system in syenite controls the radon concentration. The detectors showing the lowest Rn values were positioned on joint-free areas while the highest Rn flux was recorded on joints characterized by wide openings.