Acute effects of high-energy protons and alpha particles in mice.

摘要: Ionizing radiation is one of the many potential hazards man must face as he endeavors to conquer cosmic space. The greatest source this hazard in our solar system sun, which periodically bombards us with highly energetic protons and a particles. In most instances dose from flare particles quite small. However, during periods maximum activity can become very intense dangerous animal. Freier Webber (1) have recently reported that flares may equal for energy above certain value, flux heavier nuclear about 1 % a-particle flares. These authors estimated 10-day period July, 1959, integrated isotropic would reached 490 rads air inside spherical shell water-shielding 2 grams per square centimeter thick, under same conditions it 488 6-day November 1960. Tissue cosmic-ray irradiation will depend on both geometry rigidity particle spectrum. July 1959 events decreased 200 100 MeV 24-hour after onset flare. If we take 5 cm nominal depth blood-forming tissues calculate (2), esti-