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- W109557675 abstract "The relative biological effectiveness (RBE) for extremely energetic protons and alpha particles was studied. Ehrlich ascites tumor cells were exposed in vitro in nitrogen to alpha particles, and 250 kev x rays. The LET range covered was from 2.4 to 37.2 Mev/g/sq cm. The production of abnormal anaphase at 24 hours was used as the criterion for damage. Comparison of the slopes of the percent normal anaphase versus dose curves for the various particles and energies to that for 250 kev x rays (RBE = 1) gave RBE values for the radiation listed above of 0.44, The RBE for 60 Mev protons and perhaps 410 Mev protons which have LET values of approximately 9.5 and 3.0 Mev/ g/sq cm respectively are not consistent with the other values. The 60 Mev proton value may have resulted from a change in radiosensitivity of the tumor cell, since it was the last irradiation performed; however, this has not been confirmed. (auth)" @default.
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- W109557675 date "1962-02-01" @default.
- W109557675 modified "2023-09-27" @default.
- W109557675 title "RELATIVE BIOLOGICAL EFFECTIVENESS OF EXTREMELY ENERGETIC PROTONS AND ALPHA PARTICLES" @default.
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