The harmfulness of radiation (or RBE) is at least in part determined by the radiation's a. mass and energy
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- A tumor is exposed to a beam of protons containing 2.6 × 1010 protons. If 25% of the beam energy is absorbed in a tumor of mass 1.25 kg, what is the dose equivalent in the tumor? Each proton has an energy of 52 MeV, and the RBE of this type of radiation is 32. a) 0.043 Sv b) 1.38 Sv c) 4.3 Sv d) 13.8 Sv e) 37 SvAt a distance of 42 ft. an ionizing radiation source delivers 6.5 rem of radiation. How close could you get to the source and still have no biological effects?Please answer correctly
- RADIATION DOSIMETRY A THEORY RADIATION DOSES non-SI units (relationship between units) Dose Formula SI units ΔΕ J/kg = Gray (Gy) Absorbed Dose, rad 1 Gy = 100 rad Δm AE is the energy lost from the radiation beam, and Am is the mass of the material into which the energy is absorbed. ΔQ Roentgen (R) 1R = 2,58 · 104 C/kg Exposure dose, C/kg Δm where AQ is the electric charge freed by such radiation in a specified volume of air divided by the mass Am of that air. Relationship between absorbed dose and exposure dose D = f · X D is adsorbed dose , f is a coefficient depending on the kind of tissue being irradiated. H = Q · D where H is dose equivalent, Q is relative biological effectiveness of a particular kind of radiation, D is adsorbed dose. Equivalent Dose, Sievert rem Н (Sv) 1 Sv =100 rem Effective H ΣΗT Sievert rem 1 Sv =100 rem Equivalent Dose , Hef where HT = Wr · H, is the tissue-weighted dose equivalent to an organ or tissue, H, is the dose equivalent to the organ or tissue and the…most dangerous?