General Physics, 2nd Edition
2nd Edition
ISBN: 9780471522782
Author: Morton M. Sternheim
Publisher: WILEY
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Chapter 31, Problem 32E
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Q_ A person's hand receives a radiation dose at a rate of 50mSvh-1 at a distance of 1cm from a source. What would the dose rate be if the person's hand is 18cm from source?
An x - ray technician works 5 days per week, 50 weeks per year. Assume the technician takes an average of eight x - rays per day and receives a dose of 5.0 rem/yr as a result. (a) Estimate the dose in rem per x - ray taken. (b) How does this result compare with the amount of low - level background radiation the technician is exposed to?
An x-ray technician works 5 days per week, 50 weeks per year. (Assume that the technician takes an average of six x-rays per day and receives a dose of 4.1 rem/yr as a result.)
(a) Estimate the dose in rem per x-ray taken. (b) How does this result compare with the amount of low-level background radiation the technician is exposed to? Assume that low-level radiation from natural sources, such as cosmic rays and radioactive rocks and soil, delivers a dose of approximately 0.13 rem/year per person. __________times the normal background level
Chapter 31 Solutions
General Physics, 2nd Edition
Ch. 31 - Prob. 1RQCh. 31 - Prob. 2RQCh. 31 - Prob. 3RQCh. 31 - Prob. 4RQCh. 31 - Prob. 5RQCh. 31 - Prob. 6RQCh. 31 - Prob. 7RQCh. 31 - Prob. 8RQCh. 31 - Prob. 9RQCh. 31 - Prob. 10RQ
Ch. 31 - Prob. 1ECh. 31 - Prob. 2ECh. 31 - Prob. 3ECh. 31 - Prob. 4ECh. 31 - Prob. 5ECh. 31 - Prob. 6ECh. 31 - Prob. 7ECh. 31 - Prob. 8ECh. 31 - Prob. 9ECh. 31 - Prob. 10ECh. 31 - Prob. 11ECh. 31 - Prob. 12ECh. 31 - Prob. 13ECh. 31 - Prob. 14ECh. 31 - Prob. 15ECh. 31 - Prob. 16ECh. 31 - Prob. 17ECh. 31 - Prob. 18ECh. 31 - Prob. 19ECh. 31 - Prob. 20ECh. 31 - Prob. 21ECh. 31 - Prob. 22ECh. 31 - Prob. 23ECh. 31 - Prob. 24ECh. 31 - Prob. 25ECh. 31 - Prob. 26ECh. 31 - Prob. 27ECh. 31 - Prob. 28ECh. 31 - Prob. 29ECh. 31 - Prob. 30ECh. 31 - Prob. 31ECh. 31 - Prob. 32ECh. 31 - Prob. 33ECh. 31 - Prob. 34ECh. 31 - Prob. 35ECh. 31 - Prob. 36ECh. 31 - Prob. 37ECh. 31 - Prob. 38ECh. 31 - Prob. 39ECh. 31 - Prob. 40ECh. 31 - Prob. 41ECh. 31 - Prob. 42ECh. 31 - Prob. 43ECh. 31 - Prob. 44ECh. 31 - Prob. 45ECh. 31 - Prob. 46ECh. 31 - Prob. 47ECh. 31 - Prob. 48ECh. 31 - Prob. 49ECh. 31 - Prob. 50ECh. 31 - Prob. 51ECh. 31 - Prob. 52ECh. 31 - Prob. 53ECh. 31 - Prob. 54ECh. 31 - Prob. 55ECh. 31 - Prob. 57E
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- Calculate the dose in Sv to the chest at a patient given an xray under the following conditions. The xray beam intensity is 1.50 W/m2, the area of the chest exposed is 0.0750 m2 35.0% of the xrays are absorbed in 20.0 kg of tissue, and the exposure time is 0.250 s.arrow_forwardSuppose one load irradiation plant uses a 137Cs source while another uses an equal activity of 60Co. Assuming equal fractions of the (rays from the sources are absorbed, why is more time needed to get the same dose using me 137Cs source?arrow_forwardHow many Gy of exposure is needed to give a cancerous tumor a dose of 40 Sv if it is exposed to acfivity?arrow_forward
- A cancerous tumour is exposed to an a-emitter with an RBE of 16. What absorbed dose, in Gy, is needed to give the tumour an effective dose of 64 Sv? Report your final answer rounded to two significant digits. Your Answer: Answer unitsarrow_forward✓ ON "O 2.75 MeV 0.511 MeV 0.511 MeV B, E= 1.73 MeV Eave = 0.721 Mev O MeVarrow_forwardThe (effective) dose to a patient can be measured in milli-Serverts (mSv) or expressed as the time taken to receive the equivalent dose from background radiation. A certain radiograph gives a 1.232 mSv dose which is equivalent to a background radiation dose of 32 weeks.a)How many days in 32 weeks? Give your answer as a whole number. b)Using the information for the radiograph in this question, calculate the UK daily background dose (in mSv/day). Give your answer to 5 decimal places and use it to this accuracy, if needed in subsequent calculations. c)Another radiograph has a 0.0054 mSv dose. Work out the equivalent background dose (in days) for this radiograph. Give your answer to 2 decimal places and use it to this accuracy in any subsequent calculations. d)How many hours is the number of days in part c) equivalent to? Give your answer to 2 decimal places.arrow_forward
- During a routine Radiation Therapy procedure of Mr. X, the radiation dose at particular points at the trajectory of the beam towards the lesion is as follows 1. 15 MV 2. 10 MV 3. 8 MV 4. 6 MV 5. 5MV 6. 3 Mv 7. 2MV 8. 1 MV with the reference dose being the 5th, compute for the PDD of the beam at all points of the beam preceding the Dmaxarrow_forwardA 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 1.0 rem? (b) Assuming the gamma radiation is emitted uniformly in all directions, at what distance would a person receive a dose of 10. mrad/h from this source?arrow_forwardA point source of radioactive material produces a dose rate of 100 Gy/hr at 1 meter from the source. What would be the dose rate at 4 m from the source?arrow_forward
- 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 solutionarrow_forwardasaparrow_forwardAn 85 kg person was exposed to a gamma source and received a whole body dose of 0.5 Sv. How much energy was deposited in the person’s body? Repeat this calculation if the radiation was from an alpha source.arrow_forward
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