Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Question
Chapter 6, Problem 6.10P
To determine
The effective deposition half-life
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Students have asked these similar questions
(a) At an initial time, a radioactive sample has an activity of 8.77x104 Bq.
After 3.88 hours the activity is 5.35x104 Bq.
(A) What is the half-life of the isotope?
(B) What is the activity after an additional 3.88 hours?
(A) (in s)
OA: 6.426x103 OB: 9.317x103 oC: 1.351x104 OD: 1.959x104 OE: 2.840x104 OF: 4.119x104 OG: 5.972x104
(B) (in Bq)
H: 8.660x104
OA: 1.387x104 OB: 1.845x104 OC: 2.454x104 OD: 3.264x104 OE: 4.341x104 OF: 5.773x104 OG: 7.678x104 OH: 1.021x105
Measurements
of the radioactivity of
a certain isotope tell you that the
decay rate decreases from 8265
decays per minute to 3055 decays
per minute over a period of 5.00
days.
What is the half-life T1/2 1/2 of this
isotope?
Express your answer numerically, in
days, to three significant figures.
(a) At an initial time, a radioactive sample has an activity of 8.52x104 Bq.
After 3.85 hours the activity is 5.42×104 Bq.
(A) What is the half-life of the isotope?
(B) What is the activity after an additional 3.85 hours?
(A) (in s)
OA:
2.285x103
(B) (in Bq)
OA:
1.149x104
OB:
3.314x103
OB:
1.344x104
OC:
4.805x103
OC:
1.573x104
OD:
6.967x103
OD:
1.840x104
OE:
1.010x104
OE:
2.153x104
OF:
1.465x104
OG:
2.124x104
OF:
OG:
2.519x104 2.947x104
OH:
3.080x104
OH:
3.448x104
Chapter 6 Solutions
Introduction To Health Physics
Ch. 6 - A 50-µC/kg (approximately 200 mR) pocket dosimeter...Ch. 6 - Prob. 6.2PCh. 6 - Prob. 6.3PCh. 6 - Prob. 6.4PCh. 6 - Prob. 6.5PCh. 6 - Prob. 6.6PCh. 6 - Prob. 6.7PCh. 6 - Prob. 6.8PCh. 6 - Prob. 6.9PCh. 6 - Prob. 6.10P
Ch. 6 - Prob. 6.11PCh. 6 - Prob. 6.12PCh. 6 - Prob. 6.13PCh. 6 - Prob. 6.14PCh. 6 - Prob. 6.15PCh. 6 - Prob. 6.16PCh. 6 - Prob. 6.17PCh. 6 - Prob. 6.19PCh. 6 - Prob. 6.20PCh. 6 - Calculate the average power density, in watts per...Ch. 6 - Prob. 6.22PCh. 6 - Prob. 6.23PCh. 6 - Prob. 6.24PCh. 6 - Prob. 6.26PCh. 6 - Prob. 6.27PCh. 6 - Prob. 6.28PCh. 6 - Prob. 6.29PCh. 6 - Prob. 6.33P
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- The counting rate from a radioactive source is 4000 counts per second at time t=0. After 10 seconds, the counting rate is 1000 counts per second. a)What is the half-life? b)What is the counting rate after 20 seconds?arrow_forwardAs a health physicist, you are being consulted about a spill in a radiochemistry lab. The isotope spilled was 400 µCi of barium-131, which has a half-life of 12 days. (a) What mass of this radioisotope was spilled? (b) Your recommendation is to clear the lab until the radiation level has fallen 1 µCi. How long will the lab have to be closed?arrow_forwardA specific radioactive material was measured to have an activity of 347 MBq at 7:00 A.M., what is the half-life of this radionuclide if at 2:00 P.M. the activity was reduced by 154 MBq?arrow_forward
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