ed at American Chemical Society, 132nd Meeting,
September 8-13, 1957.
Ie mee
Farlow, N. H.; Schell, W. R.3 and Adams, C. E.
NATURE OF RADIOACTIVE FALLOUT PARTICLES. Paper
present-
New York,
,
The chemical composition, structure, and mode of origin
of several different types of radioactive fallout particles have been determined using petrographic techniques,
reagent films, and x-ray diffraction analysis. The fallout particles studied were collected following the detonation of nuclear weapons under various conditions at both
the Nevada Test Site and the Eniwetok Proving Ground.
Radioactive fallout particles were formed by the interaction of the condensing vaporized metals and fission
products derived from the bomb and associated structures
with the surface material swept up into the cooling fire-
ball. Descriptions of the warious types of fallout particles are given and their modes of origin are qualitative-
ly related by a simplified thermodynamic treatment.
31.
Franzen, L. F.3 Myszynski, G.3; and Wiesenack, G.
DOSES OF RADIATION FRON NATURAL AND ARTIFICIAL RADIOACTIVE SOURCES.
(In German).
Atomwirtschaft, 2, 362-6 (1957).
Only since quite recently has man been subjected to
irradiation which, as the result of medical and industrial development has been added to the radiation from
natural sources. According to the investigations quoted
artificial radiation accounts for 20 to 25 per cent of
the total radiation le 31. Atomic test explosions have
so far only made an insignificant contribution. The
same can still be said of the industrial application of
nuclear energy which is still in its infancy. It has
been estimated that people living in Europe will over a
period of 30 years be subjected to a total dose of radia-
tion from 2,500 to 4,000 mr. Of this total dose received
in 30 years about 750 to 850 mr will be contributed by
medical and industrial appurtenances, the overwhelming
share of 600 to 700 mr being the result of medical x-ray
diagnosis. The atmospheric radioactivity has been estimated (incl. rainfall etc.) at 20 to 30 mr over a period
of 30 years and will therefore not represent any hazards
as far as external, direct radiation is concerned.
The
possible absorption by and accumulation of radiation substances in the body must, however, be carefully studied
and special consideration must be given to fission products with a long half-life.
10
+ Ware a at REY SL SIREN VIR ETEYH Mee
30.