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Cobalt-60 (60 Co) is a synthetic radioactive isotope of cobalt with a half-life of 5.2714 years. [ 3 ] [ 4 ] : 39 It is produced artificially in nuclear reactors . Deliberate industrial production depends on neutron activation of bulk samples of the monoisotopic and mononuclidic cobalt isotope 59
cobalt-60: 5.2714 166.35 radium-228: 5.75 181 barium-133: 10.74 339 krypton-85: 10.756 339.4 hydrogen-3 (also known as tritium) 12.32 389 californium-250: 13.08 413 plutonium-241: 14.290 451.0 niobium-93m: 16.13 509 promethium-145: 17.711 558.9 curium-244: 18.10 571 actinium-227: 21.772 687.1 lead-210: 22.3 700 strontium-90: 28.79 909 curium ...
Naturally occurring cobalt, Co, consists of a single stable isotope, 59 Co (thus, cobalt is a mononuclidic element). Twenty-eight radioisotopes have been characterized; the most stable are 60 Co with a half-life of 5.2714 years, 57 Co (271.811 days), 56 Co (77.236 days), and 58 Co (70.844 days). All other isotopes have half-lives of less than ...
An even number of protons or neutrons is more stable (higher binding energy) because of pairing effects, so even–even nuclides are much more stable than odd–odd. One effect is that there are few stable odd–odd nuclides: in fact only five are stable, with another four having half-lives longer than a billion years.
This reaction has a half-life of about 5.27 years, and due to the availability of cobalt-59 (100% of its natural abundance), this neutron bombarded isotope of cobalt is a valuable source of nuclear radiation (namely gamma radiation) for radiotherapy. [1] 59 27 Co + 1 0 n → 60 27 Co
Cobalt is a chemical element ... cobalt mining in DR Congo a number of cobalt suppliers and their ... amounts with high activity by bombarding cobalt with neutrons.
Isotones are nuclides with the same number of neutrons but differing numbers of protons. Isotones neighbor each other horizontally. Examples include carbon-14, nitrogen-15, and oxygen-16 in the table above. Isobars are nuclides with the same number of nucleons (i.e. mass number) but different numbers of protons and neutrons. Isobars neighbor ...
The average number of neutrons per fission from the 312 124 compound nucleus (relative to lighter systems) was also found to increase, confirming that the trend of heavier nuclei emitting more neutrons during fission continues into the superheavy mass region. [66]