Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 11, Problem 11.5P
To determine
To Discuss:The atmospheric concentration of
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What is the activity in Ci of a 2.6 mg sample of 3H?
VE ΑΣΦ
Ro =
What is the activity in Bq of a 2.6 mg sample of ³H?
?
15. ΑΣΦ
Ro
=
?
Ci
Ba
Fluorine-18 (F-18) is a commonly used radionuclide for PET scans. The
half-life of F-18 is 110 min. F-18 is used to label the glucose molecules to form the
radiotracer called Fludeoxyglucose (FDG). Only consider the physical half-life. Initially,
a 5 ml FDG solution was prepared at a concentration of 4 mCi/ml. After 220 min, the
FDG solution was all administrated to a patient. Calculate the following questions.
Show steps to earn full points.
(1) The initial radioactivity of the solution Ag.
(ii) The decay constant of F-18 2.
(iii) The actual radioactivity that the patient received Ap.
Calculate the activity of a pure 9.5-μgμg sample of 32 over 15P
(T1/2=1.23×106s).
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- A first-order reaction has a rate constant of k = 0.00160 sec-1. How many seconds will elapse before the reaction is 60.0% complete?arrow_forward7.50 mCi of 99m Tc is used in a brain scan. What is the mass of technetium?arrow_forwardExperimentally, it is found that natural potassium emits 31 beta particles per second per gram and 3.4 gamma rays per second per gram. With this data, determine the half- life period of K40. (The isotopic concentration of K40 is 0.0118% .)arrow_forward
- If you start with 7.0×1010I7.0×1010I-131 atoms, how many are left after approximately 1 month? II-131 has a half-life of 8.0 days.arrow_forwardN-type sample has minority carrier concentration of 10^1/m ^3 , if ni=2.5x10^1m ^3 , the majority * carrier concentration is equal toarrow_forwardQ. 8: K.E. per unit volume is given by 3 2 (a) E=P (b) E=3 3 (c) E = mv² (d) None of these (CET-2003)arrow_forward
- Copper-63 has a nucleus mass of 62.92959 u. Its atomic number is 29, and its atomic mass number is 63. The mass of a proton is 1.007276 u and the mass of a neutron is 1.008664 u What is the total binding energy of the nucleus? Express your answer in MeV and keep 4 significant digits.arrow_forwardCSDA range Determine the expected range of 2 MeV beta radiation in polyethylene, Aluminium and air. Use the ESTAR database on the NIST website to find the CSDA ranges (to 4 significant figures): R(px) for polyethylene = 9.375E-01 ✓g/cm² R(px) for Al= 1.224E+00 ✓ g/cm² R(px) for air- 1.094E+00 x g/cm² Looking at the 3 values you have found, the statement in the lab notes that the range is 'inversely proportional to the density p of the material and not dependent on its structure or any other properties' is a useful rough approximation because the px values are similar even if not exactly the same The values given are density times thickness (px). To find the actual range (x) we just divide by the density.arrow_forward1%VY lI. ln. 11:0. خلف التالي nizam aihtizaziun qasriun , yahtazu jism katlatih 2 kaja. تحويل الصوت إلى نص محادثة كاميرا الإنجليزية Forced vibratory system, a body of mass 2 kg vibrates in a viscous liquid. The 20 N harmonic excitation acting on the block produces a resonant amplitude of 15 mm with a period of 0.15 s. Determine the damping factor of the viscous liquid C. Add file ... behind next one IIarrow_forward
- The rate of a simple enzyme reaction is given by the standard Michaelis–Menten equation: rate = Vmax [s]/([s] + KM) if the Vmax of an enzyme is 100 μmole/sec and the KM is 1 mM, at what substrate concentration is the rate 50 μmole/sec? Plot a graph of rate versus substrate (s) concentration for [s] = 0 to 10 mM. Convert this to a plot of 1/rate versus 1/[s]. Why is the latter plot a straight line?arrow_forwardA sample containing I-131 has an activity of 6.40 x 108 Bq. How many days later will the sample have an activity of 5.80 × 10° Bq? The half-life of I-131 is 8.0252 days. d.arrow_forwardPROBLEMS 1. If a vial contains 400 MBq of fluorine-18 (F-18) at 12:00 on 20 March 2019, how much radioactivity will be present in the vial at 14:00 on 20 March 2019? Please input your answer in Bq and Ci.arrow_forward
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