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- BIG LOGY AND MEDICINE
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Cesium 137 isone of the most important ‘of the relatively.long-lived gammaradioisotopes, with a half-life of approximately 35 years. In additionto its medi
this isotopehas.many applications in industry. ‘The demand is expected to reach
_of curies, as the techniques for extracting cesium 137 from reactor wastes are
reduced incost.
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ofabout $29, 000.
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“At the presént cost of 14per curiefor cesium 137, ‘the newlyinstalled unit has
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and its specificactivity is’24 curiesper gram of cesium 437.
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“During thepast year the Michigan group has been treating patients with c
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x ray and. with a 1,903-curie cobalt source, the largest high-specific-activity co
Ahis country.’' Acquisition of the cesium source completes the university’ s plann
installation_
of high-energy sources for use in radiation therapy at this project.(Endof UNC
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