Radiation

Archived from radmon.org - originally posted 25/08/2019 On a radmon.org forum thread we sort of got to discussing the thickness of Aluminium for shielding beta but I didn't want to divert that thread too much so started a new thread on this subject here. I had quoted, roughly in all honesty, that 5mm aluminium would do well for beta shielding and was met with this reply by user FSM19: For a beta shield you need 3mm of aluminium, foil isn't thick enough, UK Civil Defence geiger counters and ionisation instruments, such as the Meter Doserate Portable No 1 Trainer, Meter Doserate Portable No 1

Archived from radmon.org - originally posted 19/07/2017 Blackpool UK - 19 July 2017 - Started around 17:00 BST / 16:00 UTC During quite a downpour today, 20mm in one hour. At it's peak was 65mm/h. Background radiation increased by approx 50% / 11CPM over a 2.5hour period. Not much by any means but still an indication there was some radioactive substance in the rain. Please note the Radmon graphs are UTC and the rain graphs are BST (UTC + 1) and so there is an hour difference between them. What caused it? I could be anyone's guess. Radon causing decay products to get caught up in the rain?