cobalt 57


Also found in: Dictionary, Thesaurus, Encyclopedia.

cobalt

 (Co) [ko´bawlt]
a chemical element, atomic number 27, atomic weight 58.933. (See Appendix 6.)
cobalt 57 a radioisotope of cobalt, atomic mass 57, having a half-life of 270 days; used as a label for cyanocobalamin. Symbol 57Co.
cobalt 60 a radioisotope of cobalt, atomic mass 60, having a half-life of 5.27 years and a principal gamma ray energy of 1.33 MeV; used as a radiation therapy source. Symbol 60Co.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

co·balt 57 (57Co),

(kō'bawlt),
Half-life, 271.8 days; decays by electron capture with emission of a medium energy (122.06 keV) gamma ray. Used as a diagnostic aid with some metabolic disorders.
Farlex Partner Medical Dictionary © Farlex 2012