All questions are equally weighted. Relevant data will be found at the end of this paper.
Some reactions occurring in stars are neither pure fusion nor pure fission reactions.
Suppose that a star contains of lithium-6 and of deuterium. The radiation safety rules call for daily exposure to be limited to less than . For a certain experiment, a laboratory technician must work within 4m of this radioactive source. The experiment is minimize exposure by placing the source farther away from the workers. Thorium-227 is an alpha emitter.