. The basic aspects of radiation effects on living systems. Radiation -- Physiological effect. 10m < â ^ ^^ â ^ J-\ «#⢠% If - # A -%^. * H 'I 1 . .* s> Fig. 3. Photomicrographs of particle tracks in photographic emulsion. Magnifi- cation X750. a. Short cm-ved tracks (arrows) of photoelectrons produced by low-energy photons simulated by placing thin liver slice containing radioactive carbon on XTB emulsion. The nuclei of the Uver cells may be used as a rough scale by which to gauge the range and ion density of the beta particles. h. The dense, short, and straight Hne of ionization prod
. The basic aspects of radiation effects on living systems. Radiation -- Physiological effect. 10m < â ^ ^^ â ^ J-\ «#⢠% If - # A -%^. * H 'I 1 . .* s> Fig. 3. Photomicrographs of particle tracks in photographic emulsion. Magnifi- cation X750. a. Short cm-ved tracks (arrows) of photoelectrons produced by low-energy photons simulated by placing thin liver slice containing radioactive carbon on XTB emulsion. The nuclei of the Uver cells may be used as a rough scale by which to gauge the range and ion density of the beta particles. h. The dense, short, and straight Hne of ionization produced by alpha radiation is demonstrated by the affected photographic grains (arrows). The tissue cells shown (necessarily out of plane of focus of the emulsion) are of lung alveoli, and the nuclei (dark oval bodies) give some idea of dimensions involved. c. This plate was exposed to a mixture of fast neutrons and gamma rays. The photo micrograph is of the same magnification as a and h. The dark grains scattered at random are due to ionizations of photoelectrons produced by gamma rays. A rela- tively long ionization track of an energetic proton (produced by a neutron) is indi- cated by the arrow. 401. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Symposium on Radiobiology (1950 : Oberlin College); Nickson, James J. New York, Wiley
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