The Relative Biological Efficiency of 20-Mev Electrons and 250-Kevp X-Rays as Measured in the 12-Day-Old Chick Embryo

Journal Article · Tue May 01 04:00:00 EDT 1962 · Radiation Research

DOI:https://doi.org/10.2307/3571266· OSTI ID:4835575

Cooper, G. W.; Dyke, J. G. Van; Nickson, J. J.; Laughlin, J. S.

The relative biological efficiency of 20-Mev electrons compared to 250 kevp x rays was determined from the absorbed dose-mortality curve for the 12-day- old chick embryo, The criterion for death was the visual appearance of the embryo in candling of the intact egg, Initial death is defined as death 20 to 24 hours after irradiation, and later death is defined as death after 16 days of incubation. Absorbed dose was determined from comparison measurements with ferrous sulfate dosimeters and ionization chambers. The RBE for producing initial death in chick embryos was found to be 0.82 plus or minus 0.04, and the value for the later death was also 0.82 plus or minus 0.04, the x rays being the more effective.

• Research Organization: Sloan-Kettering Inst. for Cancer Research, New York
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-017521
• OSTI ID: 4835575
• Journal Information: Radiation Research, Journal Name: Radiation Research Journal Issue: 5 Vol. 16; ISSN 0033-7587
• Publisher: Radiation Research Society
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
BIOLOGY AND MEDICINE
BIRDS
CHEMICAL RADIATION DETECTORS
DOSEMETERS
ELECTRONS
EMBRYOS
ENERGY LEVELS
IONIZATION CHAMBERS
IRON SULFATES
LIFETIME
MEASURED VALUES
RADIATION EFFECTS
RADIOBIOLOGY
X RADIATION