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  • argon
  • Researchers from Michigan State University and the RIKEN Nishina Center in Japan discovered eight new rare isotopes of the elements phosphorus, sulfur, chlorine, argon, potassium, scandium and, most importantly, calcium. (phys.org)
  • fission
  • Nuclear fission of heavy elements was discovered on December 17, 1938 by German Otto Hahn and his assistant Fritz Strassmann , and explained theoretically in January 1939 by Lise Meitner and her nephew Otto Robert Frisch . (wikipedia.org)
  • For heavy nuclides , it is an exothermic reaction which can release large amounts of energy both as electromagnetic radiation and as kinetic energy of the fragments ( heating the bulk material where fission takes place). (wikipedia.org)
  • The products of nuclear fission, however, are on average far more radioactive than the heavy elements which are normally fissioned as fuel, and remain so for significant amounts of time, giving rise to a nuclear waste problem. (wikipedia.org)
  • The specific nuclear reaction may be the fission of heavy isotopes or the fusion of light isotopes. (absoluteastronomy.com)
  • variability
  • The study, titled Concomitant variability in high-latitude aerosols, water isotopes and the hydrologic cycle , utilized data provided by Joe McConnell, Ph.D., director of DRI's Ultra-Trace Chemistry Laboratory in Reno, Nev. (dri.edu)
  • ratio
  • The two nuclei produced are most often of comparable but slightly different sizes, typically with a mass ratio of products of about 3 to 2, for common fissile isotopes . (wikipedia.org)
  • sulfur
  • Two of the other new isotopes of sulfur and chlorine, S-49 and Cl-52, were not predicted to exist by a number of models that paint a lower resolution picture of nuclei. (phys.org)
  • water
  • We look to find out exactly how water moves inside aquifers, how it interacts with rivers, and how much of it is left," said Sandra Ibáñez, isotope hydrologist at the University of Cuyo, Mendoza, who is participating in an IAEA technical cooperation project in the country. (iaea.org)
  • Isotope hydrologists take water samples from Mendoza, western Argentina. (iaea.org)
  • Argentinian isotope hydrologists have been hiking the mountains and plains of Mendoza for more than a year, collecting water from wells, lakes and rivers accompanied by international and IAEA experts. (iaea.org)
  • Precipitation has the most influence on the percentage of heavy isotopes that make it to high latitudes, since heavier water molecules condense more readily compared to light ones, Markle explained. (dri.edu)
  • Production of heavy water for site reactors started in the Heavy Water Rework Facility in 1952, and the first production reactor, R Reactor, went critical in 1953. (wikipedia.org)
  • In 1962, the Heavy Water Components Test Reactor (HWCTR) went into operation, testing the heavy water system for use with civilian power reactors. (wikipedia.org)
  • This is useful to paleoclimatologists because ocean water or ice is a mixture of water molecules with different combinations of light and heavy isotopes, and thus with different weights. (waterencyclopedia.com)
  • concentration
  • To produce good-quality weapons-grade plutonium--with a concentration of the most-important heavy isotope (Pu240)--a short "burnup" fuel cycle is employed, meaning that the reactor fuel rods are removed earlier than they would be if the reactor was utilized to produce electricity. (thefreedictionary.com)
  • ones
  • Some even heavier ones might barely exist fractions of a second before disintegrating. (phys.org)
  • different
  • Certain processes affect heavier molecules more than their lighter counterparts, leading to varying distributions of different weights across the globe. (dri.edu)
  • data
  • Since early 2016, Argentinian isotope hydrologists have been gathering and interpreting data from two strategic regions with the help of the IAEA. (iaea.org)
  • travels
  • They use naturally occurring isotopes as tracers to find out where groundwater comes from, if it is recent or old, if it is being recharged or polluted and how it travels. (iaea.org)
  • application
  • Timmes, F. X. and D. D. Clayton, 1996, Galactic evolution of silicon isotopes: application to presolar SiC from meteorites. (hawaii.edu)
  • standards
  • Here, we report metabolic isotope labeling to produce isotopically labeled internal standards in bacteria and yeast. (mdpi.com)
  • eight
  • Researchers from Michigan State University and the RIKEN Nishina Center in Japan have discovered eight new rare isotopes, including the heaviest known calcium atom, calcium-60. (phys.org)
  • science
  • The science behind this is called isotope hydrology - a discipline that, according to expert Solomon, "is one of the most powerful, trustworthy tools available to assess groundwater thoroughly. (iaea.org)
  • made
  • I expected that the newly-made polypeptides, being heavier, would pellet at the bottom of the tube. (dnalc.org)