Eniwetok atoll test

All known isotopes of einsteinium are radioactive. The first evidence of lltcir existence was obtained by ion-exchange methods applied lo coral rocks obtained from Eniwetok Atoll alter (he thermonuclear explosion. The first pure isotope found was 3,3Es produced by prolonged treatment of plutonium-239 with neutrons in the Area. Idaho. Testing Reactur. The most stable is JMEs. half-life 270 days, and therefore the mass number 254 is carried in the atomic weight tabic. Others include - Es- Es. 48Es- Es, and s Es. Es. 

Einsteinium was discovered by a research team from the University of California at Berkeley. The team was led by Albert Ghiorso (1915-). The element was discovered in the ashes after the first hydrogen bomb test in November 1952 at Eniwetok Atoll, Marshall Islands, in the Pacific Ocean. The discovery was a remarkable accomplishment because no more than a hundred millionth of a gram of the element was present. It was detected because of the characteristic radiation it produced. 

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