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
Videos
Textbook Question
Chapter 10, Problem 10.13P
Calculate the exposure rate from a
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
29. A shielded vial with a 0.1-mm thick lead shield contains 11. This
A. 8 mR/hr
B. 1 mR/hr
shielded sample yields an exposure rate of 0.25 mR/hr at a
distance of 3 cm. What will the exposure rate be at the same
distance when the shield is removed? (The lead HVL for 125I is
C. 0.5 mR/hr
D. 0.25 mR/hr
0.02 mm.)
30. A shielded vial with a 4.0-mm thick lead shield contains "F. This
shielded sample yields an exposure rate of 6 mR/hr at a distance
of 1 cm. What will the exposure rate be at the same distance
when the shield is removed? (The lead HVL for F is 4.0 mm.)
A. 12 mR/hr
B. 6 mR/hr
C. 3 mR/hr
D. 1.5 mR/hr
18.6
An
is
5x10 3
behind
shield
block
with
ray
orifice
of
source
m
a
an
chamber 0.1 m from the shield
reads 150 cpm. If the diameter of the detector is 0.05 m, what
10 3
radius.
An
ion
block
should be the correct reading?
Answer:
212.6 срт.
A radiographic technique calls for 46 kVp and 28 mAs which results in an exposure of 278 µGy. What is the expected exposure
if the technique is changed to 75 kVp and 14 mAs? Round your answer to the nearest whole number. Do not include 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
- Tungsten has a linear attenuation coefficient of 30.5/cm for gamma rays with 150 keV of energy. If an unshielded Tc-99m syringe has a radiation exposure rate (I(0)) of 34 mR/hr, what will be the exposure rate if a 0.25-cm tungsten shield is placed around it? Using the calculation above, how much (what percent) is transmitted through the shield? What percent is attenuated?arrow_forwardB5arrow_forwardA beam of 5.0 MeV alpha particles (q-2e) has a cross-sectional area of 1.50 cm2. It is incident on flesh (p-950 kg/m³) and penetrates to a depth of 0.70 mm. a) What dose in Gy does the beam provide to the flesh in a time of 3.0 s? b) What effective dose does it provide? Assume the beam to carry a current of 2.50 x 109 A and to have QF - 14.arrow_forward
- A radioactive source is producing 1.50 MeV gamma rays. If two detectors are placed 4.00 m and 7.00 m away respectively, what is the ratio of the measured intensities of the near detector over the far detector (I2/I1)? Do NOT include units in your answer answer to 2 decimal places.arrow_forward4arrow_forwardA worker will need to conduct a repair to a pipe containing radioactive waste. The pipe is 10 m long, and the worker will need to be standing 50 cm from the pipe. A remote detector was used to take a reading of 1.5 R/hr at 3 m from the pipe. a) What is the dose rate at the work position? b) If the worker's dose limit is 30 rad, how long will he have to complete the work? Assume that there is no dose from approaching and leaving the work location.arrow_forward
- Do not copyarrow_forwardThe linear attenuation coefficient for 2.0-MeV gamma rays in water is 4.9 m-1 and 52 m-1 in lead. What thickness of water would give the same shielding for gamma rays as 15 mm of lead?arrow_forward1. Consider the following data from the analysis of mercury using cold vapor atomic absorption spectrometry: Concentration (ppm) 10.0 1.00 0.000 No. of replicate 15 15 20 measurements Mean of S 9.95 1.15 0.0124 Standard deviation of 0.12 0.030 0.0075 the measurement, s The calibration data yielded the following equation: S= 1.09CHE + 0.298 Where CHg is the concentration in ppm of Hg and S is the relative intensity of the emission line of Hg. Calculate for the following: a. Calibration sensitivity b. Analytical sensitivity at 10.0 and 1.00 ppm of Hg; and С. Detection limitarrow_forward
- For conventional radiography with a tungsten target, how much X-Raybeam intensity is due to Bremsstrahlung?(A) 10 %(B) 40 %(C) 60 %(D) 90 %arrow_forwardWhat is the dose rate for the muscle from g-ray source having flux of 100 photons per cm2/s ? (E g=2 MeV, m =0.025 cm-1)arrow_forward✓ ON "O 2.75 MeV 0.511 MeV 0.511 MeV B, E= 1.73 MeV Eave = 0.721 Mev O MeVarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
Half life | Radioactivity | Physics | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=IDkNlU7zKYU;License: Standard YouTube License, CC-BY