• The most stable isotope, Ac-227, has a half-life of 217 years. (ontologyportal.org)
  • Am-243 is the most stable isotope, with a half-life of 7.95*10^3 years. (ontologyportal.org)
  • it decays directly to its stable daughter isotope , 206 Pb . (wikizero.com)
  • The most stable known isotope , copernicium-285, has a half-life of approximately 30 seconds. (knowpia.com)
  • These agents form a stable complex with the copper isotope, ensuring that the radioactive atom remains securely attached to the targeting molecule until it reaches the desired location in the body. (openmedscience.com)
  • Natural processes which produce trace radioisotopes include cosmic ray bombardment of stable nuclides, ordinary alpha and beta decay of the long-lived heavy nuclides, thorium-232, uranium-238, and uranium-235, spontaneous fission of uranium-238, and nuclear transmutation reactions induced by natural radioactivity, such as the production of plutonium-239 and uranium-236 from neutron capture by natural uranium. (wikipedia.org)
  • Synthesized by nuclear bombardment in 1940 by D.R. Corson, K.R. MacKenzie and E. Segre at the University of California. (ontologyportal.org)
  • A nuclear reaction occurs during this bombardment, transforming some of the nickel nuclei into Cu-64. (openmedscience.com)
  • A trace radioisotope is a radioisotope that occurs naturally in trace amounts (i.e. extremely small). (wikipedia.org)
  • Generally speaking, trace radioisotopes have half-lives that are short in comparison with the age of the Earth, since primordial nuclides tend to occur in larger than trace amounts. (wikipedia.org)
  • Trace radioisotopes are therefore present only because they are continually produced on Earth by natural processes. (wikipedia.org)
  • The daughter nuclide may be stable, or it may decay itself. (openstax.org)
  • Comparison between radioisotope X-ray fluorescence and other analytical techniques 1 A.1.1. (docslib.org)
  • Comparison between radioisotope and conventional X-ray fluorescence analysis 4 A. 2.1. (docslib.org)