High-energy gamma rays on the human body's destructive effect is quite large, when the human body is subjected to gamma radiation dose of 200-600 rem, the human hematopoietic organs such as bone marrow will be damaged, white blood cells are severely reduced, internal hemorrhage, hair loss, the probability of death in two months 0-80%;
When the radiation dose of 600-1,000 rem, the probability of death in two months 80-100%; when the dose of 1,000-1,500 rem, the human gastrointestinal system will be destroyed; when the radiation dose of 1,000-1,500 rem, the human gastrointestinal system will be destroyed.
When the radiation dose is 600-1000 rem, the probability of death within two months is 80-100%; when the radiation dose is 1000-1500 rem, the human gastrointestinal system will be destroyed, diarrhea, fever, endocrine disorders, within two weeks the probability of death is almost 100%;
When the radiation dose is 5000 rem or more, can lead to central nervous system damage, spasms, tremors, dysfunction, sleepiness, within two days the probability of death is 100%. The probability of death is 100%.
To go to your local CDC for chromosome analysis, exposure to gamma radiation, if it causes damage, it first shows up on the chromosomes.
Extended information
Gamma rays, also known as gamma particle streams, are rays released when the atomic nucleus recedes from excitation at energy level leaps, and are electromagnetic waves with wavelengths shorter than 0.01 angstroms.
Gamma rays have a strong penetrating power, can be used in industry to detect injuries or automatic control of the assembly line. gamma rays on the cell has a killing power, medical treatment is used to treat tumors.
Gamma rays were first discovered by French scientist P.V. Velarde, and are the third type of atomic nuclear rays discovered after alpha and beta rays.
Reference: Baidu Encyclopedia Gamma rays