What about the current Geiger counters readings seem a bit high! 13.36 Move upwards!
The Geiger counter readings are consistently in the range of 40-50 CPM, with some diurnal variation. No short-term events like the neutron ones have been seen. The cell body of 2.5 mm thick stainless steel would block charged particles and most (>90%) photons below 100 kEv.