cobalt 60


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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.
References in periodicals archive ?
Goff also said the nuclear waste handling systems needed to use the new technology are similar to those already used at nuclear power plants, and the process of sterilizing the products is almost identical to processes currently used in the cobalt 60 irradiation industry.
It is unlikely the cobalt 60 came from a hospital in Delhi.
The cobalt 60 was contained in thermal vessels that can withstand heat of up to 800 C and no radiation leakage was detected, company officials said.
In between process runs, the cobalt 60 racks are submerged in 23 feet of water to prevent the radiation from emitting.
Supporters insist that cobalt 60, the most commonly used radiation source, is largely recyclable and can be transported safely; opponents reply that promoters of nuclear power also dismissed concerns about nuclear waste, and now spent fuel is an enormous problem.
by CH2M Hill, an engineering consulting firm, notes that due to "a shortage of isotope (both cobalt 60 and cesium 137) any major utilization of irradiation in the food industry is precluded in the near term.
In India, the procurement and disposal of Cobalt 60 and radioactive sources are regulated by AERB, Mumbai, implementing the Atomic Energy ( Radiation Protection) Rules, 2004.
We compete against several companies seeking to address the food safety market, including firms offering gamma ray Cobalt 60 technology and alternatives to irradiation, such as thermal sterilization, fumigation and chemical washes," Oberkfell says.
Company officials confirmed that nine of the 11 liquid-level gauges on tanks that contain cobalt 60, a radioactive substance, in a burned building were not damaged by the fire.
The source of radiant energy is controlled and limited to cobalt 60 and cesium 137.
Quantities of cobalt 60, used in "dirty" (enhanced radiation) bombs, were buried in lead pots.