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So the Sievert is an estimate of the damage done by some combination of radioactivity present in an environment, and the accuracy of this estimate depends strongly on the degree to which various sources of that radiation is incopropated INTO living organisims?

"It is not necessary to have hope in order to persevere."
by ARGeezer (ARGeezer a in a circle eurotrib daught com) on Mon Apr 4th, 2011 at 11:05:37 AM EST
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Yes here they're telling you that the cross-section of interaction of neutrons with living tissue is largest between 100 keV and 2 MeV.
neutrons 10-100 keV 10
neutrons 100 keV - 2 MeV 20
neutrons 2 MeV - 20 MeV 10
Which sort of makes sense: extremely energetic neutrons, being neutral particles, will just whizz past living matter having a shorter time to interact with atomic nuclei, while low-energy neutrons will have a low penetration depth.

But the specific numerical factors must have been determined empirically though who knows what procedures.

Rolf Maximilian Sievert - Wikipedia, the free encyclopedia

Professor Sievert (Swedish pronunciation: [ˈsiːvəʈ]) was born in Stockholm, Sweden. He served as head of the physics laboratory at Sweden's Radiumhemmet from 1924 to 1937, when he became head of the department of radiation physics at the Karolinska Institute. He played a pioneering role in the measurement of doses of radiation especially in its use in the diagnosis and treatment of cancer. In later years, he focused his research on the biological effects of repeated exposure to low doses of radiation. In 1964, he founded the International Radiation Protection Association, serving for a time as its chairman. He also chaired the United Nations Scientific Committee on the Effects of Atomic Radiation.

He invented a number of instruments for measuring radiation doses, the most widely known being the Sievert chamber.

Economics is politics by other means
by Migeru (migeru at eurotrib dot com) on Mon Apr 4th, 2011 at 11:10:36 AM EST
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