Word: thorium
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Since the first explosion reverberated through the world's laboratories, the fission of thorium, as well as uranium, has been demonstrated. Atom-wranglers at Columbia University have shown that, under various conditions, the fission of uranium yields krypton, strontium, iodine, xenon, tellurium as disintegration products. The flood of reports made it appear that atomic physicists are off on the biggest big-game hunt since the discovery of artificial radioactivity was announced...
Ordinary lead's peculiar isotope distribution dates back millions of years and was probably caused by the early "contamination" of ordinary lead in its active elements uranium and thorium, Dr. Nier believes. This theory has yet to be thoroughly investigated...
Ordinary lead, which has the isotopes 204, 206, 207, and 208, is the only lead to have the isotope 204; uranium lead is in two isotopes, 206, and 207; and thorium ends up in a lead of only one form, weighing 208 units...
...only factor limiting the temperature in the new Harvard furnace is the melting point of the crucible. The best crucibles obtainable at present are made of tantalum, lined with thorium oxide. Both substances melt at about 5000 degrees Fahrenheit...
...probably) the triton. After them, in Nature's system of elements, comes helium (atomic weight approximately 4). The helium atom's nucleus is the alpha particle which, in the full round of substances, again appears during the disintegration of the heaviest of the 92 elements-uranium, thorium, actinium, radium...