Comments on: Prof. Richard Broinowski on his travels to Japan post-Fukushima and how the nuclear disaster is affecting the country https://ifyoulovethisplanet.org/?p=5687 A weekly radio program with Dr. Helen Caldicott Tue, 28 Apr 2026 11:20:28 +0000 https://wordpress.org/?v=2.7 hourly 1 By: Mike https://ifyoulovethisplanet.org/?p=5687&cpage=1#comment-1417 Mike Mon, 12 Mar 2012 06:57:17 +0000 https://ifyoulovethisplanet.org/?p=5687#comment-1417 One point of issue. The half life of Iodine 131 being so short means that it is extremely radioactive. Pound for pound if you like, this means that the governed by half life, the decay of one gram of radionuclide that has the half life of one day, will be 1000 times more radioactive than an equivalent weight of radionuclide with a half life of 1000 days. That is how i understand it, and it is why Iodine131 is so amazingly radioactive. Another one would be Radon222. A small amount is extremely radioactive. Also this is why it is so difficult to detect radionuclides with longer halflives like radio Cesium and so on. Radioactivity in a sample does not indicate how much is in a sample alone. One point of issue.
The half life of Iodine 131 being so short means that it is extremely radioactive.
Pound for pound if you like, this means that the governed by half life, the decay of one gram of radionuclide that has the half life of one day, will be 1000 times more radioactive than an equivalent weight of radionuclide with a half life of 1000 days.
That is how i understand it, and it is why Iodine131 is so amazingly radioactive.
Another one would be Radon222.
A small amount is extremely radioactive.
Also this is why it is so difficult to detect radionuclides with longer halflives like radio Cesium and so on.
Radioactivity in a sample does not indicate how much is in a sample alone.

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