By Lewis G.N.

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Extra info for [Article] Steric Hindrance and the Existence of Odd Molecules (Free Radicals)

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The present projections for the year 2000 are higher by from 25 to about 50 percent, depending on latitude. Much of the difference is accounted for by increases in the projected nuclear generating capacity. 1 86Kr CONCENTRATIONS / 33 YEAR Fig. 5. Concentration of 86Kr measured in northern hemisphere air samples. (Assembled from various sources by UNSCEAR, 1972, p. ) The difference in the present estimate for the year 2000, due to latitude, is only 20 percent, reflecting the long life of 86Krrelative to the equilibration time for hemispheric mixing.

DOSIMETRY surface with the angular and spectral distributions given by the infinite cloud calculation has been estimated for each of the twelve monoenergetic original sources. 01 to 4 MeV, spaced t o make interpolation possible. The methods used and the phantom are described in MIRD Pamphlet No. , 1969) although some changes have been made to provide a more realistic estimate of dose for the problem posed by atmospheric 8%r. These include a separation of the legs of the phantom, a region containing testes, and a rounded region for the cranium or top of the head.

However, the concentration will not be uniform, the concentrations in adipose tissue being almost an order of magnitude higher than in most tissues. Rremsstrahlung will be produced in the body by the beta rays emitted from 85Krpresent in body tissues. , the fact that some portion of the range of the beta rays is outside the organ or tissue of origin is ignored). Likewise, bremsstrahlung will be produced in the skeleton to a greater extent than in soft tissues because of the higher charge number of many of the constituents of bone.

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