| 释义 |
cobalt 60
cobalt 60
n. a radioisotope of cobalt having a mass number of 60 and a half-life of 5.2 years, used chiefly in radiotherapy. [1945–50] Thesaurus| Noun | 1. | cobalt 60 - a radioactive isotope of cobalt with mass number 60; a source of exceptionally intense gamma rays; used in radiation therapyatomic number 27, cobalt, Co - a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition |
EncyclopediaSeeCobaltcobalt 60
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.co·balt 60 (60Co), (kō'bawlt), Half-life, 5.271 years; emits beta particles and energetic gamma rays, for which reason it is used in radiation teletherapy and diagnostics in place of radium, radon, or x-rays. It is also used as a diagnostic aid in the evaluation of vitamin B12 absorption.co·balt 60 (kō'bawlt) Radioactive isotope created by irradiating stable 59Co with neutrons in a reactor; has a mass number of 60; half-life 5.3 years; used in teletherapy and brachytherapy; emits beta particles and gamma-rays. cobalt 60
Words related to cobalt 60noun a radioactive isotope of cobalt with mass number 60Related Words |