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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 ...
Cobalt-57 (Co-57 or 57 Co) is a cobalt radioisotope most often used in medical tests, as a radiolabel for vitamin B 12 uptake, and for the Schilling test. Cobalt-57 is used as a source in Mössbauer spectroscopy and is one of several possible sources in X-ray fluorescence devices. [176] [177]
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When the rocket went off course, it was carrying two small containers of cobalt 57, [6] [7] an isotope used in "salted bombs" to intentionally contaminate large areas of land. [5] As part of the cleanup effort, hundreds of tons of soil were removed from the impact site. [5]
57 livermorium-293: 57 polonium-205m3: 57.4 radium-204: 60 lead-182: 60 uranium-225: 61 ... cobalt-56: 77.27 6.676 scandium-46: 83.79 7.239 sulfur-35: 87.32 7.544 ...
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In addition to their uses in radiography, both cobalt-60 (60 Co) and iridium-192 (192 Ir) are used in the radiotherapy of cancer. Cobalt-60 tends to be used in teletherapy units as a higher photon energy alternative to caesium-137, while iridium-192 tends to be used in a different mode of therapy, internal radiotherapy or brachytherapy.
The following are among the principal radioactive materials known to emit alpha particles.. 209 Bi, 211 Bi, 212 Bi, 213 Bi; 210 Po, 211 Po, 212 Po, 214 Po, 215 Po, 216 Po, 218 Po; 215 At, 217 At, 218 At