measured in kilo electron volts, or kev. On Rongelap there were found three major "energy regions," of 100, 700, and 1500 kev. That is, within the fallout on the ground there were particles which were being emitted in these three general regions (levels) of strength. Fallout Samples A third source of information upon which would be based whole-body doses, was actual fallout material. (incinerated coral) By studying the radioactive calcium oxide scientists determined the mixture of different elements and their energies. However, radioactive it is interesting to note that the doses calculated for all the exposed persons, according to the 1956 report by the AEC, "came from fallout samples taken soon after the detonation at points — ~~ ~~ some distance from the contaminated atolls.’ (p.6) Why the samples were not collected from the islands on which the people were exposed was not explained. One of the important factors in calculating the amount of radiation exposure is the length of time of the fallout itself. could be estimated was from the reading on Rongerik, and personal eyewitness estimates of time. Neorwmale ko — —~ — —— —— Based on the early and later readings at Rongerik, it appeared that the period of fallout was about 16 hours, or, a long fallout. information, However, other including reports of persons who saw the fallout, it was shorter than 16 hours and that it ended early. indicated that A long fallout also conflicted with readings taken later. Finally, or not the result would be nearly the same, the fallout was long, or short, since in a short length of time as fallout, it was concluded that whether the heavier material would descend during the same it would during a 95 neon The only way this long fallout. Im other words, the heaviest