THE RELATIVE BIOLOGICAL EFFECTIVENESS OF 200-Kvp X-RAYS, COBALT-60 GAMMA- RAYS, AND 22-Mevp X-RAYS, DETERMINED FROM THE DOSE-SURVIVAL CURVE OF SACCHAROMYES CEREVISIAE
The relative biological effectiveness of cobalt-60 gamma rays (1.17, 1.33 Mev) and 22-Mevp x rays from a betatron with reference of 200-kvp x rays (primary HVL 1.4 mm Cu) has been determined by using the slope of the survival curve of the yeast Saccharomyces cerevisiae (based on macrocolony counts) as the biological end point. The average RBE of five experiments was found to be 0.85 for cobalt-60 gamma radiation and O.85 for 22-Mevp x radiation, with uncertainties of the order of the J-57 engin 0.05 in each case. No significant difference between cobalt-60 gamma radiation and 22-Mevp x radiation was demonstrated. (auth)
- Research Organization:
- Originating Research Org. not identified
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-13-010814
- OSTI ID:
- 4281712
- Journal Information:
- Radiation Research, Vol. Vol: 10; Other Information: Orig. Receipt Date: 31-DEC-59
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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