2. Cs-137 source used in mining industry has an activity of 740 MBq as of March 30, 2000. What will be its activity on Dec. 30, 2020? (T1/2 = 30 yr)
Q: sample 3.00 hours before the injection (at 7:00 am) with an activity of 3.53 μCi at the preparation…
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Q: 137 If the specific activity of a 35 Cs source is initially 5x1016 Bq/kg, what is the specific…
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Q: radioactive
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Q: A 5,560 Ci 60 Co source used for cancer therapy is considered too weak to be useful when its…
A: Given, The activity of C60o used for cancer therapy = 5,560 Ci = R0 The reduced activity of C60o…
Q: 10.10. A sample of wood from an Egyptian mummy case has a specific activity of 9.41 d/min-g. How old…
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Q: . A multiplying medium has a neutron population of 1.0 x 1012 neutrons per cubic centimeter at time…
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Q: . A saline solution of 24Na with an activity of 300 kBq is injected into the bloodstream of one…
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Q: a sample with a half-life of 19 days has an initial activity of 7.0 x 10^5 counts/s. what isits…
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Q: 12. A point source of 5-MeV y-rays with intensity 3 x 103 y-rays/cm2- sec is shielded with 50 cm of…
A: Given: The energy of the Gamma-rays is E = 5 MeV The intensity of the point source is I0 = 3 x 103…
Q: 14. A cancer patient received a gamma-ray dose of 0.1 Gy and a proton dose of 200 mGy. What was the…
A: Solution: The equivalent dose of the gamma-ray dose and the proton dose is given by the following…
Q: radiation worker stands 50 cm away from a radioactive source of 25 mCi 57Co. Calculate the…
A: Given the activity of the radioactive source is equal to 25 mCi . The half- life of the source is…
Q: A sample of 134La(T/2 = 6.5 min) has an activity of 4 curies. What was its activity one hour ago?
A: Final Activity A = 4 curies Half life T1/2 = 6.5 min time t = 1 hour = 60 min
Q: Consider 6 µg of 210 Po. (a) What is the rate in disintegrations per sec? (b) What is the energy of…
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Q: A 70kg person experiences a whole body exposure to alpha radiation, RBE=15 with energy 4. 77MeV. A…
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Q: Question 6. At Canadian Light Source, a synthetie radioisotope is freshly prepared. The initial…
A: Given: The initial activity of synthetic radioisotopes is A0 = 10 mCi The activity changes after t =…
Q: What is the mass of 1ci of 227Th? If the half-life is 1.90 years.
A: T1/2 = 1.90 years = 1.90 x 3.15 x 107 s λ = 0.693/T1/2 = 0.693/(1.90 x 3.15 x107s)
Q: 13. A radiation worker stands 50 cm away from a radioactive source of 25 mCi "Co. Calculate the…
A: The given values are,
Q: Find the activity of a sample containing 1.63 10-6 g of (60/27)Co (T1/2 = 5.27 years).
A: As we know that the number 1 mole of mass of C2760o = 60gm…
Q: Find the activity A of a sample containing 4E-6 g of 2760Co (T1/2 = 5.27 years). (Use 59.93 u as the…
A: Given: Weight, W =4.0×10-6 g Mass number, A = 59.93 u Avogadro number, NA = 6.022×1023 atoms/mol…
Q: A 5000-Ci ⁶⁰Co source used for cancer therapy is considered too weak to be useful when its activity…
A: Basic Details The ratio of the activity is an exponential function of decay activity and the time…
Q: A radioisotope was injected in the human body. The half-life of the radioisotope is T/2 = %3D 6…
A: Given: T1/2=6 hours
Q: A cobalt 60 source with activity 2.60 x 10^4 ci is embedded in a tumor that has mass 0.20kg.The…
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Q: A synthetic radioisotope is freshly prepared in a lab that has an activity of 10.0 mCi. If the…
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Q: A lab worker reports an activity of 80,000 counts/scounts/s for a sample of magnesium-21, whose…
A: The objective of the question is to understand the reason behind the drastic decrease in the…
Q: What is the mass of 60 Co in a cancer therapy transillumination unit containing 5.00 kCi of 60 Co ?
A: The expression for the mass,
Q: A 228Th source is labeled 1.50 mCi, but its present activity is found to be 3.47 ✕ 106 Bq. (a)What…
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Q: A 7. A saline solution of 24Na with an activity of 300 kBq is injected into the bloodstream of one…
A: The objective of the question is to calculate the patient's blood volume using the given activity of…
Q: A small region of a cancer patient’s brain is exposed for 24.0 min to 475 Bq of radioactivity from…
A: Given: To find the dose in rads with the given values as,
Q: (a) What is the mfp of 0.0253eV neutrons in Zr? For Zr: A=55.8, p=6.5 g/cm³, σ₁-8b, σa=0.18b (b) To…
A: Given, For Zr, A=55.8ρ=6.5g/cm3σs=8bσa=0.18b n=ρNAAn=6.5×6.023×102355.8n=0.702×1023 1 barn=10-24cm2…
Q: A sample contains 1.0 GBq of ⁹0 Sr and 0.62 GBq of ⁹0Y. (a) What will be the total activity of the…
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Q: QUESTION 13 The following table of probabilistic time estimates (in weeks) and activity predecessors…
A: From the table, the activity G can start via three processes.These are,As, D's immediate…
Q: A radiation worker stands 50 cm away from a radioactive source of 25 mCi 57Co. Calculate the…
A: Exposure rate
Q: Strontium-90 from the testing of nuclear bombs can still be found in the atmosphere. Each decay of…
A: The amount of nuclei initially absorbed is
Q: A radiation worker stands 50 cm away from a radioactive source of 25 mCi 57Co. Calculate the…
A:
Q: 45. A 60 Co source is labeled 6.1 mCi, but its present activity is found to be 2.03x107 Bq. (a) What…
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Q: 38. A patient receives an x-ray dose of 200 mGy, a 20-keV neutron dose of 70 mGy, and a proton dose…
A: 38. The radiation weighting factor of neutron, proton, and x-Ray, wn=10wp=2wx=1 The whole body…
Q: The radionuclide 32P (T1/2 = 14.28 d) is often used as a tracer to follow the course of biochemical…
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Q: 4. 500 mCi sample of radioisotope was purchased by a medical supply house. If the sample has the…
A: Given: The activity of the initial sample of the radioisotope is A0 = 500 mCi The activity reduced…
Q: Find the activity of a sample containing 1.63 10-6 g of (60/27)Co (T1/2 = 5.27 years).
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Q: 3. (a) Calculate the decay constant for cobalt-60 (T1/2 = 5.26 Years) in units of week ¹ (b)…
A: Half life of cobalt -60 is T1/2= 5.26 year { 1 year = 365.25 days } T1/2 = {(5.26×356.25 ) ÷7}…
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