Q23. When a deuteron (;H) of mass 2.0141lu and negligible kinetic energy is absorbed by a lithium nucleus (;Li ) of mass 6.0155u, the product disintegrates spontaneously into two alpha-particles, each of mass 4.0026u. Calculate the energy, in joules, given to each alpha particle (lu = 1.66 × 10" "kg). 27 Answer is 1.825 x 10" J
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- An unstable isotope of cobalt, 60Co, has one more neutron in its nucleus than the stable 59Co and is a beta emitter with a half-life of 5.30 years. This isotope is widely used in medicine. A certain radiation source in a hospital contains 4.20×10−2g of 60Co A) What is the decay constant for that isotope? Express your answer with the appropriate units. B) How many atoms are in the source? C) How many decays occur per second? Express your answer as a number of decays per second. D) What is the activity of the source, in curies? Express your answer in curies.QI/ How much energy is required to remove a neutron from Pd nucleus? using the two methods Where: MAPd)=102.906114u, Ma(Pd)=101.905634u11. A 60 kg person accidentally ingests a small source of alpha particles (RBE=15). The activity of the source is 0.04 Ci, the half life of the source is 110 years, and each alpha particle emitted has an energy of 0.586MEV. It takes 12 hours for the alpha source to pass through the persons digestive system and exit the body. (a) How many alpha particles are absorbed by the person (you may assume that 100% of the alpha particles emitted by the source are absorbed by the person)? (b) How much energy is deposited in the person by the source (in J)? (c) What is the absorbed dose (in rad)? (d) What is the absorbed dose (in rem)?
- Using the data from Table 1, how much energy is released in the fusion of deuterium 12 D and tritium 13T if helium and a neutron are formed in the reaction? Question 33 options: a 5.98 x 10-10 J b 7.48 x 10-10 J c 1.70 x 1015 J d 2.81 x 10-12 J48. The mass of a nucleus of plutonium (Pu23994) is 238.990396 u. Show that the binding energy per nucleon for plutonium is 7.6 MeV (show your work on scratch papers). A radioactive isotope of an element decays with half-life 10 minutes. If originally there are 64 atoms in a sample of the element, what is the time that should pass until only one atom of the element is left out? What is the decay constant k?Francium -233 has a half-life of 21.80min. I). How many nuclei are initially present in a 25.0mg sample of Francium-233 ii). What is its initial activity? iii). How many nuclei will be present 1hr and 49min later?
- E c) For a radio-nuclide, a number No of atoms at time t = 0 decays as N(t) = No e¯‹, where A is the decay constant. i) Derive the relationship between the half-life t₁ and the time constant □ = = 1/λ. ii) The radio-nuclide radium-226 has a half-life of 1600 years. Calculate the activity of one gram of radium in Becquerels. iii) Radium-226 decays to radon-222, known as the daughter product. The amount of a daughter product present will vary with time, Na(t). Sketch two graphs, with appropri- ate axes and labels, to show schematically how N(t) and Na(t) evolve if Na(0) = 0, for the two extreme cases where the daughter product is much more radioactive than the parent (\d >> \) and where the daughter product is much less radioactive than the parent (\a << λ). Given that the half-life of radon-226 is 3.8 days, indicate which graph is relevant and estimate the amount of radon in equilibrium with one mole of radium.Radon gas has a half-life of 3.83 days. If 2.75 g of radon gas is present at time t = 0, what mass of radon will remain after 2.10 days have passed? g Need Help? Read ItThe radioactive nuclide plutonium 199 has a half life of 43.0min.A sample is prepared that has an initial activity of 7.56 x 10^11Bq i.How many plutonium 199 nuclei are initially present in the sample ii. What is the activity at this time