6. Cs-137 emits gamma photons with a principle energy of 662 keV while Tc-99m has a principle photon energy of 140 keV. Would you expect to have about the same exposure reading (mR/hr) of 90 mCi of Tc-99m at 1 meter as you would for 90 mCi of Cs-137 at 1 meter? Why or why not? (Hint-multiple detector characteristics may impact your answer.)

6. Cs-137 emits gamma photons with a principle energy of 662 keV while Tc-99m has a principle photon energy of 140 keV. Would you expect to have about the same exposure reading (mR/hr) of 90 mCi of Tc-99m at 1 meter as you would for 90 mCi of Cs-137 at 1 meter? Why or why not? (Hint-multiple detector characteristics may impact your answer.)

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter6: The Periodic Table And Atomic Structure

Section: Chapter Questions

Problem 6.21PAE: 6.21 The electron binding energy fur copper metal is 7.181019J . Find the longest wavelength of...

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Similar questions

The second is defined as the time it takes for 9,192,631,770 wavelengths of a certain transition of the cesium-133 atom to pass a fixed point. What is the frequency of this electromagnetic radiation? What is the wavelength?
The space probe Pioneer 11 was launched April 5, 1973, and reached Jupiter in December 1974, traveling a distance of 998 million km. How long did it take an electromagnetic signal to travel to Earth from Pioneer 11 when it was near Jupiter?
At its closest approach, Mercury is 77.3 million km from Earth. How long would it take to send a radio message from a space probe of Mercury to Earth when the planets are at this closest distance?
6.85 The visible lines in the hydrogen atom emission spectrum arise from transitions with a final state with n = 2. In what spectral region should we expect to find transitions that have a final state of n = 1 ? Explain your reasoning using an energy level diagram similar to the one in Problem 6.26.
When an electron is accelerated by a voltage difference, the kinetic energy acquired by the electron equals the voltage times the charge on the electron. Thus, one volt imparts a kinetic energy of 1.602 1019 volt-coulombs, or 1.602 1019 J. What is the wavelength for electrons accelerated by 1.00 104 volts?
An atom emits yellow light when an electron makes the transition from the n = 5 to the n = 1 level. In separate experiments, suppose you bombarded the n = 1 level of this atom with red light, yellow light (obtained from the previous emission), and blue light. In which experiment or experiments would the electron be promoted to the n = 5 level?
A photoemissive material has a threshold energy, Emin = 5 1019 J. Will 300. nm radiation eject electrons from the material? Explain.
6.20 When light with a wavelength of 58.5 nm strikes the surface of tin metal, electrons are ejected with a maximum kinetic energy of 2.691018 J. What is the binding energy of these electrons to the metal?
Cobalt-60 is a radioactive isotope used in medicine for the treatment of certain cancers. It produces particles and rays, the latter having energies of 1.173 and 1.332 MeV. (1 MeV = 106 electron-volts and 1 eV = 1.6022 1019 J.) What are the wave-length and frequency of a -ray photon with an energy of 1.173 MeV?
6.21 The electron binding energy fur copper metal is 7.181019J . Find the longest wavelength of light that could eject electrons from copper in a photoelectric effect experiment.
6.28 A neon atom cmi light at many wavelengths, two of which are at 616.4 and 638.3 nm. Both of these transitions are to the same final state. (a) What is the energy difference between the two states for each transition? (b) If a transition between the two higher energy states could be observed, what would be the frequency of the light?

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