Shell Development's senior scientific ranks included scientists who had been graduate students of Glenn Seaborg, a Berkeley scientist who pioneered techniques to create and verify transuranium elements.
22.
Among the nine underground tests that were carried between 1962 and 1969, the last one was the most powerful and had the highest yield of transuranium elements.
23.
It was the third transuranium element to be discovered even though it is the fourth in the series the lighter element americium was unknown at the time.
24.
Californium has also been used to produce other transuranium elements; for example, element 103 ( later named lawrencium ) was first synthesized in 1961 by bombarding californium with boron nuclei.
25.
Ian Ray, a forensic nuclear scientist from the Institute for Transuranium Elements in Karlsruhe, Germany, estimates that only 5 to 10 percent of the illegal traffic in radioactive materials is detected.
26.
"' Edwin Mattison McMillan "'( September 18, 1907 September 7, 1991 ) was an American physicist and Nobel laureate credited with being the first-ever to produce a transuranium element, neptunium.
27.
He worked with Edwin M . McMillan, who shared the Nobel Prize for chemistry in 1951 with Glenn T . Seaborg for their contributions in describing neptunium, plutonium and other transuranium elements.
28.
Since these comprise a large percentage of fission products, Segr?and McMillan decided that the half-life must have been simply another fission product, titling the paper " An Unsuccessful Search for Transuranium Elements ".
29.
Among the transuranium elements, this restriction was relaxed, there followed curium ( after the Curies ), einsteinium, fermium ( Enrico Fermi ), mendelevium ( Dmitri Mendeleev ), nobelium, and lawrencium ( after Ernest Lawrence ).
30.
Minor amounts of uranium-240 are also formed, and capture of large numbers of neutrons by individual nuclei leads to formation of small but detectable amounts of higher transuranium elements, e . g . einsteinium-255 and fermium-255.
