A pellet of plutonium-238,illuminated by the glow of its own radioactivity. Plutonium (Atomic number 94,symbol Pu) occurs in nature only in minute quantities that arise from the decay of Uranium- 238,the heaviest naturally-occuring element. All of plutonium's isotopes are radioactive; Plutonium-238 is used as a long-life power source in space applications. Pioneer-10,the interplanetary probe,is powered by a plutonium- 238 source. A second isotope,Plutonium- 239,is used as an explosive in atomic bombs and as a fuel in nuclear reactors. Plutonium is a highly toxic and carcinogenic (cancer forming) substance and is dangerous even at very low concentrations | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / US Dept. of Energy |
Taille de l’image : | 5025 px × 3797 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |