For an alpha particle at the energy of 447.6 MeV, what is the energy deposited by an alpha particle while passing through a cell of size 10 µm?
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- A chest x ray uses 10 keV photons. A 60 kg person receives a 30 mrem dose from one x ray that exposes 25% of the patient’s body. How many x-ray photons are absorbed in the patient’s body?A patient swallows a radiopharmaceutical tagged with phosphorus-32 (P), a ߯ emitter with a half-life of 14.3 days. The average kinetic energy of the emitted electrons is 7.00 x 10² keV. If the initial activity of the sample is 1.31 MBq, determine (a) the number of electrons emitted in a 10.0-day period, (b) the total energy deposited in the body during the 10.0 days, and (c) the absorbed dose if the electrons are com- pletely absorbed in 1 × 10² g of tissue.question 4 please
- In proton beam therapy, a beam of high-energy protons is used to deliver radiation to a tumor, killing its cancerous cells. In one session, the radiologist calls for a dose of 4.9 x 108 protons to be delivered at a beam current of 120 nA. How long should the beam be turned on to deliver this dose?Protons enter a region of electric field where the potential difference between where the protons enter and exit is +5×106 volts (5 MV). Assuming the initial energy of the protons was negligible, how much energy does the proton gain? What if we had a fully ionized carbon-12 nucleus instead?A 95 kgkg patient swallows a 33 μCiμCi beta emitter with a half-life of 5.0 days, and the radioactive nuclei are quickly distributed throughout his body. The beta particles are emitted with an average energy of 0.35 MeVMeV, 90%% of which is absorbed by the body. What dose equivalent does the patient receive in the first week?
- Alpha particles with energy 4.25 MeV interact with gas molecules in ion – chamber and produced 300 particles /second. If the particles lose all its energy in the ion – chamber, the ionization energy is 35 eV, what is the current produced by these particles? Find the resistance that must be connected in series with the ion chamber for the voltage difference to be 0.1 and 1 V?A, Explain the importance of reducing exposure dose and time to a patient undergoing a diagnostic X-ray examination. Describe ways to achieve this. B, Calculate the wavelength of the most energetic X-rays produced by tube operating at pd of 1×10^6 V, h= 6.6×10^(-34) J, e=1.6×10^(-19) C, c=3×10^8 ms^(-1)