노벨륨

역사The name of No derives from “Alfred Nobel”, the discoverer of dynamite and founder of the Nobel prizes. It was first synthesized in 1966 by the Russian scientists from the JINR (Joint Institute for Nuclear Research) lab in Dubna, Russia under Georgi Flerov. Earlier claims to have synthesized “Nobelium” beginning in 1957 were shown to be erroneous but the original name was retained because of its widespread use throughout the scientific literature. In 1958 a group at Berkeley, California, USA reported that they were unable to reproduce this work, findings agreed by a Russian group at Dubna. However an authenticated discovery of nobelium was made in 1958 by A. Ghiorso, T. Sikkeland, G. T. Seaborg and J. R. Walton at Berkeley, California. Since then a number of isotopes with mass numbers in the range 250–259 have been made. The longest half-life associated with this unstable element is 58 minute 259No.