Accession Number : AD0287066

Title :   EFFECTS OF RADIATIONS OF DIFFERENT LET ON ARTEMIA EGGS

Corporate Author : SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX

Personal Author(s) : EASTER,STEPHEN S. JR. ; HUTCHINSON,FRANKLIN

Report Date : MAR 1962

Pagination or Media Count : 1

Abstract : Eggs of the brine shrimp Artemia salina were irradiated in the dry state and after being soaked in water for various times with gamma rays, 1 Mev electrons, and ions of He, C, O, and A with an energy of 10 Mev/nucleon. Sigmoidal survival curves with a multiplicity of the order of 60 are found for irradiation with gamma rays and electrons. The survival curves are changed to exponential ones for irradiation with the heavy ions, the transition for dry eggs occurring between He and C ions. For the heaviest ions, the effective cross section per ion approaches a maximum value the order of 0.15 microns squared. Soaking the eggs in sea water for times up to 25 hours decreases the survival with heavy ions only a little, but drastically changes the sigmoidal survival curve for electrons, reducing the multiplicity from about 60 to about 4. These changes on soaking are about the same at 6 hours and at 24 hours. (Author)

Descriptors :   *EGGS, *RADIATION EFFECTS, COBALT, DOSE RATE, ELECTRONS, GAMMA RAYS, IONS, SHELLFISH, VIABILITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE