Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 11, Problem 11.10P
To determine
The activity of iodine to be incinerated per 40-hour week.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
✓
ON
"O
2.75 MeV
0.511 MeV
0.511 MeV
B, E= 1.73 MeV
Eave = 0.721 Mev
O MeV
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
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
units
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Suppose 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_forwardWhat is the dose in mSv for: (a) a 0.1 Gy xray? (b) 2.5 mGy of neutron exposure to the eye? (c) 1.5 mGy of exposure?arrow_forward
- In a Ussing chamber with Gramicidin channels inserted in the separating membrane.The left side has radioactively labeled K+ ions the right side has unlabeled ions K+, in equal concentrations (c1=c2). Measurements conducted at +20 mV show that the radioactive flux is 10 times higher than the non-radioactive flux in the opposite direction. What is the mean occupancy of the channel by potassium, i.e. number of ions in the barrel?arrow_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 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_forwardYou are using a Cs-137 radiation source with an "activity" level of 5 μCi that emits primarily beta particles with energy 0.5120 MeV. Use the equation given to calculate the total beta-radiation exposure you would experience in 3 hours of lab work with this radioactive source. (H) is the equivalent dose rate in mrem/hr, (A) is the activity of the sample in Ci, (E) is the energy of the emitted radiation in eV, and (r) is the average distance from the source during the exposure in meters. To find the radius, use a reasonable distance - as if you were working with an experimental apparatus and radioactive sources in person during these three hours (how far, on average, would you be from the source during that time?). For comparison, you would be exposed to approximately 3.5 millirems if you were to fly from the east coast to the west coast of the US.arrow_forward
- How many Gy of exposure is needed to give a canceroustumor a dose of 40 Sv if it is exposed to α activity?arrow_forwardQ_ 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?arrow_forward(Internal Exposure: Internal Radiation Dose) Given a 20µCi of 32p (T/2 = 14.3 days) is delivered intravenously of a reference adult (70 kg). The biological half-life throughout the body is 19 days. Calculate: a. the absorbed dose constant (express your answer in erg/g t and Gy/t) for P-32 irradiating the whole body uniformly b. total number of transformations that occur in the total body as a source organ; assume that P-32 is metabolized wherein 40% is uniformly distributed to the whole body thus the initial activity distributed in the total body is q, = 0.40 × 20µCi = 8µCi c. the total body dose. where t refers to the transformation number. Note: 1 Joule = 107ergarrow_forward
- for a ussing chamber, the left side has radioactively labeled K+ ions ,the right side has unlabeled ions K+, in equal concentrations (c1=c2). Measurements conducted at +20 mV show that the radioactive flux is 10 times higher than the non-radioactive flux in the opposite direction. What is the mean occupancy of the channel by potassium, i.e. number of ions in the barrel?arrow_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_forwardThe dosage of technetium-99m for a lung scan is 20. µCi /kg of body mass. How many millicuries of technetium-99m should be given to a 49 kg person (1 mCi = 1000uCi)? Suppose a person absorbed 46 mrad of alpha radiation.What would be the equivalent dose in millirems?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax CollegePrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningModern PhysicsPhysicsISBN:9781111794378Author:Raymond A. Serway, Clement J. Moses, Curt A. MoyerPublisher:Cengage Learning
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Modern Physics
Physics
ISBN:9781111794378
Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher:Cengage Learning