Seaborg

In June 1974, members of the Joint Institute for Nuclear Research in Dubna, U.S.S.R., reported their discovery of Element 106, which they reported to have synthesized. Glenn Seaborg was part of this group, and the element was named in his honor. Seaborgium is often still referred to as Element 106 because the international committee in charge of names changed the rules. They decided retroactively it couldn t be named after a living person. 

Planet pluto) Plutonium was the second transuranium element of the actinide series to be discovered. The isotope 238pu was produced in 1940 by Seaborg, McMillan, Kennedy, and Wahl by deuteron bombardment of uranium in the 60-inch cyclotron at Berkeley, California. Plutonium also exists in trace quantities in naturally occurring uranium ores. It is formed in much the same manner as neptunium, by irradiation of natural uranium with the neutrons which are present. 

Dmitri Mendeleev) Mendelevium, the ninth transuranium element of the actinide series discovered, was first identified by Ghiorso, Harvey, Choppin, Thompson, and Seaborg in early in 1955 during the bombardment of the isotope 253Es with helium ions in the Berkeley 60-inch cyclotron. The isotope produced was 256Md, which has a half-life of 76 min. This first identification was notable in that 256Md was synthesized on a one-atom-at-a-time basis. 

G. T. Seaborg,. J. Katz, and W. M. Manning eds.. The Transuranium Elements Research Papers, National Nuclear Energy Series, Div. IV, 14B, McGraw-Hill Book Co., Inc., New York, 1949. 

G. T. Seaborg, Man-Made Transuranium Elements, Prentice-HaH, Inc., Englewood CHffs, N.., 1963. 

G. T. Seaborg, The TransuraniumElements, Yale University Press, New Haven, Coim., 1958. 

G. Hermann, Superheavy Elements, International Review of Science, Inorganic Chemisty, Series 2, Vol. 8, Butterworths, London, and University Park Press, Baltimore, Md., 1975 G. T. Seaborg and W. Loveland, Contemp. Physics 28, 233 (1987). 

The discovery of plutonium-238, an a-emitter having a half-life, 0, of 87.7 years, by G. T. Seaborg and co-workers (9,10) was achieved by bombardment of uranium using deuterons, (eqs. 1 and 2) ... 

G. T. Seaborg and W. D. Loveland, The Elements Beyond Cranium, Wiley-Interscience, New York, 1990. 

G. T. Seaborg, "Transuranium Elements, Products of Modem Alchemy," Benchmark Papers in Physical Chemisty and Chemical Physics, Vol. 1, Dowden, Hutchison Ross, Stroudsburg, Pa., 1978. 

E. K. Hyde, I. Perlman, and G. T. Seaborg, The Nuclear Properties of the Heavy Elements, Prentice-Hall, Englewood Cliffs, N.J., 1964 E. Browne, R. B. Firestone, and V. S. Shirley, eds.. Table of Radioactive Isotopes,John Wiley Sons, Inc., New York, 1986. 

R. E. Coimick, in G. T. Seaborg and J. J. Kat2, eds., TheMctinide Elements, National Nuclear Enefgy Series, Plutonium Project Record, Vol. Div. IV, Vol. 

Glenn T. Seaborg Institute for Transactinium Science Los Alamos National Laboratory... 

E. McMillan and P. Abdson synthesized the first transuranium elemeni sjNp. Others were synthesized by O. T. Seaborg and his colleagues during die next 15 y. 

G. T. Seaborg proposed the actinide hypothesis and predicted 14 elements (up to Z = 103) in this group. 

The remaining actinide elements were prepared by various bombardment techniques fairly regularly over the next 25 years (Table 31.1) though, for reasons of national security, publication of the results was sometimes delayed. The dominant figure in this field has been G. T. Seaborg, of the University of California, Berkeley, in early recognition of which, he and E. M. McMillan were awarded the 1951 Nobel Prize for Chemistry. 

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