Calculate the activity of these samples at the given times: 2.2 mCi Tl-201 (t₁/2 = 73.1 hours) at 22 hrs before calibration 25 μCi Tc-99m at 12 hours before calibration 10 mCi F-18 at 3.5 hours before calibration
Q: Calculate the activity of a pure 9.5-μgμg sample of 32 over 15P (T1/2=1.23×106s).
A: Mass of sample (m) = 9.5 ×10-6 grams Molecular mass of P-32 = 32 grams Half life (T1/2) = 1.23×106…
Q: A 9.0Ci Ir-192 source (half-life = 73.8 days) was installed in a high dose rate brachytherapy…
A: Given: Activity of sample = 9 Ci Half life of sample = 73.8 days
Q: One half the γ rays from 99m Tc are absorbed by a0.170-mm-thick lead shielding. Half of the γ rays…
A:
Q: A beam of 168-MeV nitrogen nuclei is used for cancertherapy. If this beam is directed onto a…
A: The equation for the number of nitrogen nuclei that were stopped is given by,
Q: The point source Co-60 emits gamma with energies of 1.17 MeV and 1.33 MeV. Each of these energies…
A:
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: Co-60 is a strong gamma emitter that is used in radiotherapy units and must be replacedwhen its…
A: The objective of the question is to determine when the Co-60 in a radiotherapy unit will need to be…
Q: Consider 6 µg of 210 Po. (a) What is the rate in disintegrations per sec? (b) What is the energy of…
A:
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: Question : A water solution of the Tc-99m radiotracer has an initial radioactivity of 2 mCi/ml. The…
A: Given, Half-life of Tc-99m is t12=6 hr. Initial activity, A∘=2 mCi/ml. Time of activity, T=12…
Q: 40.12 A sample of material contains 2.00 x 1015 atoms. The sample initially consists entirely of a…
A: Let N denote the number of atoms of the radioactive substance A. Let t1/2 denote the half-life time…
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 of a sample containing 4.72 x 10-6 g of 60/27Co (T1/2 = 5.27 years)
A:
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: Use the worked example above to help you solve this problem. The half-life of the radioactive…
A: Given data:T1/2=1.6×103 yrN0=3.41×1016 nucleiFirstly, converting half life into…
Q: Calculate the activity of these samples at the given times: 3.06 mCi l-131 (t₁/2 = 8.04 days) at…
A:
Q: A certain biological sample is given a dose of 7.50 rad from alpha particles. (WR = 20) Calculate…
A: Given :- a dose of 7.50 rad from alpha particles WR = 20 Equivalent dose HT = absorbed dose * WR =…
Q: For conventional radiography with a tungsten target, how much X-Ray beam intensity is due to…
A: Given: For conventional radiography with a tungsten target, how much X-Ray beam intensity is due to…
Q: A synthetic radioisotope is freshly prepared in a lab that has an activity of 10.0 mCi. If the…
A:
Q: A solution of In-111 DTPA from the Amersham Corp. in Great Britain arrives in your department with…
A: The half-life of In-111 according to the chart of nuclides is…
Q: What time interval elapses while 51.0% of the radioactivity of a sample of 7233As disappears, as…
A: As per given data, 51% of the radioactivity of a sample disappears.
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- During a diagnostic x-ray examination a 1.2 kg portion of a broken leg receives an equivalent dose of 0.40 mSv. (a) What is the equivalent dose in mrem? (b) What is the absorbed dose in mrad and in mGy? (c) If the x-ray energy is 50 keV, how many x-ray photons are absorbed?We use a Geiger counter to measure the YT, the total yield (in counts) due to a radioactive source with some unwanted background. We separately measure, for the same amount of time, YB, the background yield (in counts) with the source removed. The uncertainty (sigma) in the inferred net yield (i.e. that yield which is due to the source alone) is YT + YB. True or FalseA 228Th source is labeled 1.50 mCi, but its present activity is found to be 3.47 ✕ 106 Bq. (a)What is the present activity in mCi? mCi (b)How long ago (in y) did it actually have a 1.50 mCi activity?
- The radionuclide 49Sc has a half-life of 57.0 min.At t=0, the counting rate of a sample of it is 6000 counts/min above the general background activity, which is 30 counts/min.Without computation, determine whether the counting rate of the sample will be about equal to the background rate in 3 h, 7 h, 10 h, or a time much longer than 10 h.QUESTION 13 The following table of probabilistic time estimates (in weeks) and activity predecessors are provided for a project Immediate Most Probable Predecessor Activity A B C D E F G H Table 1 Reference: Ref 1 A, B B C D, E F Optimistic Time Time 11 13 5 13 6 3 4 6 2 3 10 5 6 8 4 13 Using Table 1, the earliest start time for activity G is OA. 0.0 weeks. OB. 10.0 weeks. O C. 10.5 weeks. O D. 15.5 weeks. O E. None of the above Pessimistic Time 14 19 14 7 11 13 6 9 decessors are pExperimentally, it is found that natural potassium emits 31 beta particles per second per gram and 3.4 gamma rays per second per gram. With this data, determine the half- life period of K40. (The isotopic concentration of K40 is 0.0118% .)
- Please asapA radiation worker stands 50 cm away from a radioactive source of 25 mCi 57Co. Calculate the exposure value received by the worker while standing for 1 hr near the source. The isotop half-life is 271.8 days. can you use the formulas from the pictures please? thank youA 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 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 solutionFind the activity of a sample containing 1.63 10-6 g of (60/27)Co (T1/2 = 5.27 years).Find the activity of a sample Containing 701X 1019 10aine-131 nuciei (T1/2=8.0 days).