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: sample 3.00 hours before the injection (at 7:00 am) with an activity of 3.53 μCi at the preparation…

A:

Q: Two 13.3 mg radium tubes are arranged in a line with their centers 5.5 cm apart. A weaker source is…

A: Decay constant for radium λ=0.006 day-1 mass of radium m=226.03 g/mol A=13.3 mg distance

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: 3. A hot particle resided on the skin of a worker at a US NRC licensed facility for 24 hours and was…

A: The equivalent Dose is given by the formula D=A×k×twher A is the activityk is the conversion factort…

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: An alpha source was counted for 10 hours at a distance of 2 cm from a detector with an active face…

A:

Q: . A Geiger counter measures background radiation and records 950 counts in 10 minutes. Then the…

A:

Q: Consider the following data from the analysis of mercury using cold vapor atomic a spectrometry:…

A: GivenS=1.09 CHg+0.298

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: 2. Cs-137 source used in mining industry has an activity of 740 MBq as of March 30, 2000. What will…

A:

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: 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: A radiation worker stands 35 cm away from a radioactive source of 30 mCi (11.1 GBq) 9mTc (k, for…

A: The exposure rate is given by

Q: If the USA had 300 operating nuclear reactors, and the estimated probability of a large nuclear…

A: Required Probability of a large nuclear release in any given year.

Q: A mouse has a thickness of approximately 20mm. Assume the mouse is completely composed of the ICRU4…

A: Given: In this question, the given details are, A mouse has a thickness of approximately 20mm.…

Q: A radioactive contaminant gives an unfortunate 0.5 kg lab rat a dose of 1500 rem in just 1 minute.…

A:

Q: A radiographic technique calls for 46 kVp and 28 mAs which results in an exposure of 278 µGy. What…

A: The primary exposure technique factors the radiographer selects on the control panel are…

Q: Calculate the order of magnitude of mass of proton/neutron, given the orders of magnitude of nuclear…

A: Given:         The magnitude of nuclear density is of the order of 1017          Nuclear size is of…

Q: 12. A radioactive contaminant gives an unfortunate 0.5 kg lab rat a dose of 1500 rem in just 1…

A:

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: A beam of 5.0 MeV alpha particles (q-2e) has a cross-sectional area of 1.50 cm2. It is incident on…

A:

Q: Q6:- What is the range of a beta particle with IMEV energy in aluminum if its density is 2.698…

A: Given: Energy of Aluminum,EAl=1MeVDensity of Alumiunm,ρAl=2.698g/cm3Density of…

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: 5. A small calibrated dosimeter records an exposure of 200 R when embedded in an equilibrium…

A: Given: Dosimeter records an exposure of 200 R HVL = 2.0 mm eu  To find the dose to the bone Formula…

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: A radioactive source is producing 1.50 MeV gamma rays. If two detectors are placed 4.00 m and 7.00 m…

A: Distance of two detecters from the source…

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 20 g sample of cobalt is irradiated in a power reactor with a flux of 1014 n/cm2/s for 6 years.…

A: To calculate the activity of 60mCo immediately upon removal from the reactor, we need to consider…

Q: 71 A 20 mCi gamma source emits 0.200 Mev photons 65% of the time and 0.750 Mey photons 35% of the…

A:

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.