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 6, Problem 6.33P
To determine
The photon flux in
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Will quantitative fluorescence spectroscopy be as sensitive to path length differences in sample cells as quantitative UV-visible spectroscopy? Explain.
What are some of the potential pitfalls of parts per billion analysis?
At around 150keV, If you know that the mass attenuation coefficient of lead is around 4 cm2 /g, and that its density is 11.34 g/cm3 : a) What is the half-value layer (HVL) of lead at this photon energy? b) How many sheets of HVL thickness you need to use in order to attenuate the X-ray beam at around 150keV to be lower than 10-3 of its incident intensity
Question: The radionuclide Tc-99m is a gamma photon emitter. The emitted gamma photonenergy is 141 keV. The scintillation crystal in a Gamma camera will convert the single gammaphoton to a burst of visible photons. Assuming the generated visible photons wavelength is 550nm, calculate how many visible 550-nm photons will have the same amount of energy as a single141-keV gamma photon?
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
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
- In a diagnostic x-ray procedure, 5.25×1010 photons are absorbed by tissue with a mass of 0.590 kg. The x-ray wavelength is 2.00×10−2 nm. A) What is the total energy absorbed by the tissue? Express your answer in millijoules. B) What is the equivalent dose in rem? Express your answer in rem.arrow_forwardA Perspex (Lucite) phantom is used to calibrate a 6 MV photon beam. A cylindrical air ion chamber has a wall thickness (polystyrene) of 0.20 g/cm2 and an inner diameter of 5 mm. The ion chamber is placed at a depth of 5 cm in the phantom. The NxAion = 1.05 × 1010 R/C (T = 22 oC, P = 760 torr) for Co-60 for this chamber. Charge collected is 2.50 × 10-8C at P = 750 torr and T = 20.0 oC. The ion collection efficiency is 0.985. (a) Calculate the Ngas (Gy/C) for the chamber. (b) Calculate the absorbed dose (Gy) in Perspex at this depth. (c) What would be the absorbed dose (Gy) in water at approximately the same depth in a water phantom?arrow_forwardThe point source Co-60 emits gamma with energies of 1.17 MeV and 1.33 MeV. Each of these energies emits the same number of photon particles. At a certain location, the flux read is 5.7 x 109 photons/cm2.s, what is the flux energy for 1.17 MeV for 24 hours of radiation exposure?arrow_forward
- IB. Wliv is a PET scan more accurate than a SPECT scan?arrow_forwardTwo monoenergetic neutron beams of intensities I1=2x1010 neutrons/cm2.s and I1=1x1010 neutrons/cm2.s intersect at an angle of 30o. Calculate the neutron flux and current in the region where they intersect.arrow_forward1. A point source of Co-60 gamma rays emits qual number of photons of 1.17 and 1.33 MeV, giving a flux density of 5.7 × 10⁹ photons/cm² sec at a specified location. What is the energy flux density there, expressed in erg/cm² sec and in J/m² min?arrow_forward
- Gamma-ray detectors like the one described in the preceding problem often use calorimetry to determine gamma-ray energies. Suppose a beam of 100-MeV gamma rays strikes a target with a mass of 2.5 kg and specifi c heat 430 J/(kg # K). How many gamma rays are needed to raise the target’s temperature by 10 mK?arrow_forwardTypical HVL values for X-ray radiation with energy 1 MeV are 3 cm for bone tissues, 2 cm for aluminum, 0.3 cm for lead. Find mass and linear attenuation coefficients if densities are 1.85 g/cm3 , 2.70 g/cm3 , 11.35 g/cm3, respectively.arrow_forwardA technique of 40 mAs , 200 kV, 200 cm SID produces 0.12 Gy exposure. If we change the technique to: 80mAs, 175 kV at 100 cm SID find the new exposure in rad?arrow_forward
- The mass of a helium-4 atom is 4.002603u. (mp 1.007276u, mn= 1.008665u and me= 0.000549) %3D (a) Determine the mass defect of a helium-4 atom. (b) Determine the binding energy of a helium-4 atom. Give your final answer in MeV. (1MEV= 1.602 x 1013)) te the tesarrow_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_forwardThe linear absorption coefficient of 1 MeV X-rays in water is 7.06 m-1. How many times will the radiation intensity decrease in a 19.6 cm thick water layer?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
University Physics Volume 3PhysicsISBN:9781938168185Author:William Moebs, Jeff SannyPublisher:OpenStax
Modern PhysicsPhysicsISBN:9781111794378Author:Raymond A. Serway, Clement J. Moses, Curt A. MoyerPublisher:Cengage Learning
College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
University Physics Volume 3
Physics
ISBN:9781938168185
Author:William Moebs, Jeff Sanny
Publisher:OpenStax
Modern Physics
Physics
ISBN:9781111794378
Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher: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