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Acknowledgements
The author wishes to thank Jennifer Keenahan for many of the diagrams on this website

The author wishes to acknowledge the authors of the following websites for the opportunity to reproduce some of their diagrams on this website

Geiger 1
Radioactivity sites with images
http://library.thinkquest.org/17940/texts/radioactivity/radioactivity.html

Nuclear med 1
http://www.draximage.com/ignitionweb/data/rte/Image/gammacamera02.gif
230 x 250 pixels - 38k
http://www.draximage.com/draximage/en/about/history

smoke alarm 1
http://www.nngov.com/fire/images/pub-ed/brk-alarm.jpg/image_view_fullscreen
150 x 150 pixels - 8k
http://www.nngov.com/fire/images/pub-ed/brk-alarm.jpg/view

smoke alarm 2
http://www.indepthinfo.com/gadgets/gifs/smoke-detector.jpg
300 x 234 pixels - 13k
http://www.indepthinfo.com/gadgets/smoke-detector.shtml

thickness control
www.gcsescience.com/ prad25.htm

radiation logo 1
http://nuclear.mst.edu/glossary3.html

radon 1
http://nuclear.mst.edu/glossary3.html

radiation warning 1
http://www.chotisiduniya.com/edutainment/science/sci05.asp

fission 1
https://inlportal.inl.gov/portal/server.pt?open=514&objID=1269&mode=2&featurestory=DA_101041

https://inlportal.inl.gov/portal/server.pt/community/environmental_resource_
management/333/snf_-_how_does_nf_get_%27spent%27_/3066

magnetic deflection of rays 1
http://www.lbl.gov/abc/experiments/Experiment7.html

penetration 1
http://www.accessexcellence.org/AE/AEC/CC/radio_slides.html#radioactivity