Q1-A reaction rate is the number of reactions per time unit in a medium irradiated by a neutron flux 6(E). Ifthe number of atoms at the time t is N(t) and the reaction cross section is o(E), write the expression, withdetailed explanation, of the the reaction rate as - N. Write also the solution of the differential equation andexplain the nuclide evolution under a neutron flux.· ipQ2-What is the energy of a 1 keV neutron after an elastic scattering on a sodium nucleus (A=23) with a /2deviation angle in the center of mass?Q3-Give the differential equation for radioactive decay of an isotope X with a number of isotope given byNx(t) and a half-life of T1/2. Solve this equation and draw the evolution plot for this isotope.

Answered: Image /qna-images/answer/b0b60f74-64fe-488c-89f5-4581b737dc81.jpg

Answered: A reaction rate is the number of…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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The radionuclide 32P (T1/2 = 14.28 d) is often used as a tracer to follow the course of biochemical reactions involving phosphorus. (a) If the counting rate in a particular experimental setup is initially 3050 counts/s, how much time will the rate take to fall to 170 counts/s? (b) A solution containing 32P is fed to the root system of an experimental tomato plant, and the 32P activity in a leaf is measured 3.48 days later. By what factor must this reading be multiplied to correct for the decay that has occurred since the experiment began?
A 0.025 nm X-ray source deposits 30 million photons into 10 grams of tissue. What is the absorbed dose in the tissue (in Gy)? What is the dose equivalent (in Sv)?
A radioactive source emits 1800 α particles during an observation lasting 10 hours. In how many one minute intervals do you expect no α’s? 5α’s?
A radiation worker stands 10 cm away from a radioactive source of 55 mCi 57Co. Calculate the exposure value received by the worker while standing for 2 hr near the source. The isotope half-life is 271.8 days.
Consider the region close to a nuclear reactor that produces large fluxes of prompt gamma rays with energies of about 7 MeV. Use the graph below, showing the mass attenuation coefficient of gamma rays in different stopping media as a function of energy, to determine the approximate thickness of lead shielding which would be required to reduce the gamma flux by a factor of 101º. The density of lead is 11.3 g cm. 10 5 Pb 0.5 0.1 Pb 0.05 Cu AL 0.01 0.01 0.05 0.1 0.5 1 5 10 50 100 Energy (MeV) Attenuation coefficient (cm²g")
A particular radioactive source produces 100 mrad of 2-MeV gamma rays per hour at a distance of 1.0 m. (a) How long could a person stand at this distance before accumulating an intolerable dose of 1 rem? (b) Assuming the gamma radiation is emitted uniformly in all directions, at what distance would a person recieve a dose of 10 mrad/h from this source? dont provode hand written solution
Lead (density 11.34 g/cm³) and concrete (density 2.4 g/cm³) are highly effective materias in radiation shielding. a) What thickness of lead in cm is required to reduce the intensity of a 0.2 MeV gamma ray beam by a factor of 1000. b) What is the thickness of concrete in cm equivalent to that thickness of lead?
Using the half-life (13.57 days) and exact mass (142.91082 amu), calculate the total energy released (in J/mol) by the radioactive decay of 1.00 lb of praseodymium-143 in one hour and compare to in one year.
A radiopharmaceutical is labeled with an activity of 480 mCi on April 1 at 6:00am. What is the activity of the formulation in mCi at 6:00am on April 10? The half life of the radioisotope is 8.10 days. Report to the nearest tenth, number only. λ=2.303/t (logN0/N)
In a certain town, the average yearly background radiation consists of 27.7 mrad of X-rays and γ rays plus 2.50 mrad of particles having a QF of 8.09. How many mrem will a person receive per year on the average?

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