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Author Topic: Nuclear Insecurity Today  (Read 3276 times)

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AGelbert

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Re: Nuclear Insecurity Today
« on: February 04, 2014, 12:36:56 am »
John William Gofman is professor emeritus of Medical Physics at UC Berkeley, and lecturer for the Department of Medicine, UCSF. While getting As PhD in physics at Berkeley in the 1940s, Gofman proved the slow and fast neutron fissionability of uranium-233.

At the request of J. Robert Oppenheimer, Gofman helped produce plutonium (not even a quarter-milligram existed at the time) for the Manhattan Project.

He got his MD from UCSF in 1946 (winning the Gold-Headed Cane Award, presented to the senior who most fully personifies a "true physician") and began his research on coronary heart disease.

In 1963 the Atomic Energy Commission asked him to establish a Biomedical Research Division at the Lawrence Livermore National Laboratory to evaluate the health effects of all types of nuclear radiation. By 1969, however, the AEC and the "radiation community" were downplaying his warnings about the risks of radiation . Gofman returned to full-time teaching at Berkeley, switching to emeritus status in 1973.


Quote
When gamma rays or x-rays set electrons in motion, the electrons are traveling at a lower speed than the electrons coming out of Cesium-137. And as a result, when they're traveling at a lower speed, they interact much more with each micrometer of path they travel.

Therefore the local harm is much greater.
So medical x-rays set in motion electrons that are traveling at a lower speed and hence producing about twice the linear energy transfer, and hence twice the biological effect.

That's why alpha particles from radium or plutonium are so much more devastating
than beta rays set in motion from x-rays. The alpha particles, with their heavy mass and plus-2 charge, just rip through tissue so strenuously that they don't go very far.

A deception of the crassest sort are the lectures by pro-nuclear people showing a plutonium or radium source and putting up a piece of paper and showing that the alpha-particle radiation on the other side is zero. "You see, a piece of paper will stop those alpha particles, folks, there's no problem with plutonium." Except when that alpha particle is lodged next to an endosteal cell in the bone and producing a horrendous amount of interaction. Or that alpha particle is lodging on the surface of the bronchi — that's why we've got an epidemic of lung cancer among the uranium miners! The fact that they don't travel far is because they interact like hell!

http://www.ratical.org/radiation/CNR/synapse.html

http://ecowatch.com/2014/02/02/50-reasons-fear-fukushima/
Rob not the poor, because he is poor: neither oppress the afflicted in the gate:
For the Lord will plead their cause, and spoil the soul of those that spoiled them. Pr. 22:22-23

 

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