All Forums  GQ Electronics Forums  2.GQ Geiger Muller Counter  Radioactive gas mantle and storage

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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by SolarSurveyMonitor[/i] [br]It is known that some gas mantles are radioactive. I managed to found some of them, however, as I searched lately, those are doped with Thorium dioxide. The mantles are in a sealed plastic bag, and with GMC-300E+ 4.50 measures 660 to 780 average CPM. If I separate the counter, more than 2 or 3 cm, it decreases drastically. Few doubts I have: 1. With plastic bag, filters out all alpha particles?, next 2. With same above, but now wrapped with aluminum foil, should block beta particles right?, and 3. All above plus a steel sheet of 0.8 ~ 1.0 mm, must block alpha and beta particles and only pass gamma rays? Should I still keep them in their bags or it is needed more shielding? I will provide photos if needed, any foreword is welcome meanwhile. [/quote]    Insert an Image File Check here to include your profile signature.