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(回答先: Re: バン＝アレン帯を人間は安全に通過することができるのか？ 投稿者 tomo 日時 2002 年 9 月 12 日 20:31:25)
Radiation was not an operational problem during the Apollo missions. Doses received by the astronauts were significantly lower than the yearly average of 5 rem set by the US Atomic Energy Commission for workers who used radioactive materials in factories across the United States.
Average radiation doses for all astronauts on a particular mission were computed for each of the Apollo missions, and ranged from skin doses of 0.16 to 1.14 rads. The maximum dose limit was 400 rads to the skin for each of the Apollo missions, so actual radiation levels were well below the limit. Individual readings varied 20 percent because the astronauts were in different parts of the spacecraft, which had different shielding effectiveness, and because of their different duties and movements. Doses to blood forming organs were 40 percent lower than doses measured at the body surface.
Four of the five mice returned alive; two in good, active condition, two subdued and hunched up. The body tissues of the four live mice showed no change due to HZE. The olfactory epithelium was severely damaged in four of the mice, less severely in the other. Both flight and control mice showed hemorrhaging in the middle ear cavity bilaterally. Although there were thirteen tiny lesions in the scalps of three flight mice, there were no pathological changes to the brain meninges or calvarium. Five particles were recorded through the eyes, but no retinal lesions were found. Although detailed studies were performed in an effort to discover whether HZE particles are injurious to brain and other tissue, the absence of lesions does not negate this possibility．