Scattering of Uncollimated Cobalt 60 Gamma Radiation by Concrete and Lead Barriers

The Effect of Cobalt-60 Gamma Radiation on Passive Immunity *

A considerable amount of work has been reported in the literature on the effect of x-rays on antibody formation and immunity. With the exception of the reports from our laboratory,5"' the depressing effect of cobalt-60 gamma radiation upon immunity and antibody formation has not been reported. It would seem logical that x-rays and gamma rays should have a similar physiological effect. However, ...

On the mechanism of inactivation of antibody activity by cobalt-60 gamma radiation. I.

Experimentally determined relationships between 6°Co radiation dose and inactivation of combining activity of anti-PAB indicated that a relatively large number of reactions were associated with inactivation. A progressive increase in gross molecular disorganization with increasing radiation dose was indicated by a change in viscosity. Some degree of molecular rearrangement was also suggested by...

Measurement of Cesium-137 and Cobalt-60 Gamma Radiation With a Pressure Ionization Chamber

The characteristics of the pressure ionization chamber at t he National Bureau of Standards have been studied for the gamma radiation from a cesium-137 sou rce (0.6614 Mev) and from a cobalt-60 source (1.1715 and 1.3316 Mev). The dosage rates produced in air by these sources were measured with this chamber with an accuracy of about 2 percent. Dosage rates obtained with an extrapolation chamber ...

Multicurie Cobalt 60 Units for Radiation Therapy.

Comparison between Amperometric and Chemiluminescence methods in detection and dosimetry of cobalt-60 gamma ray emission

Background: Hydrogen peroxide (H2O2), produced by gamma ray irradiation to watery solution, was used as an analytical parameter for dosimetry of cobalt-60 (60Co) radiation. Materials and Methods: Detection of the produced H2O2 was carried out using two methods: an amperometric biosensor fabricated by immobilization of anthraquinone 2-carboxylic acid modified horseradish peroxidase on glassy car...