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 2.GQ Geiger Muller Counter
 Surprise radiation detected
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Sonicmixmaster

USA
49 Posts

Posted - 08/23/2018 :  15:20:22  Show Profile  Reply with Quote
So after working out many quirks with my 600+ model I felt confident to test it out "in the field" at work starting this week on Wednesday. My work week starts Wednesday and ends Sunday so I have been taking the detector with me to work each night and monitoring readings while having the detector in my work pants side pocket. Although I do not want to say where I work at this time I did visit my friends for lunch after work today and was very surprised when my detector went nuts!!! Take a look at the image below.
https://www.dropbox.com/s/3a9qnbkth3ip2ak/2018-08-23%2015.13.08.jpg?dl=0
It turns out that the tiles in my friends bathroom are radioactive. I was getting beeps standing in the bathroom by the sink washing my hands before I eat. The bathroom is covered with radioactive tiles on all walls but ceiling and floor did not show any high readings. The detector went off when it was about 2 feet from the ceramic/radioactive tile wall. What do you guys think?

Edited by - Sonicmixmaster on 08/23/2018 15:28:33
Reply #1

ullix

Germany
346 Posts

Posted - 08/23/2018 :  22:57:14  Show Profile  Reply with Quote
1599CPM is quite a nice clip! What name, brand and origin are the tiles, and where can I buy them for my tests? ;-)

This seems to be a lot and I have a hard time believing that such stuff is sold. I would verify that the counter is giving reasonable values when tested against some more familiar source. I recommend using KCl. Get at least a pound of it, and bring it as close to the Geiger tube as possible. Should give you near 150'CPM. Explained in Potty Training here: https://sourceforge.net/projects/geigerlog/files/GeigerLog-Potty%20Training%20for%20Your%20Geiger%20Counter-v1.0.pdf/download

Some further tests: Put some beta absorbers between tiles and counter to see if this is mostly beta or mostly gamma radiation. Beta absorbers like e.g. >3mm glass or aluminum, >2mm steel or copper, >100 sheets of copy paper

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Reply #2

Sonicmixmaster

USA
49 Posts

Posted - 08/24/2018 :  06:55:43  Show Profile  Reply with Quote
The tiles been in the house for 40-50 years as I was told by my friends. Will test the materials you said in the future and post back. Thanks.
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