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Chapter 42: Q20P (page 1303)
What is the binding energy per nucleon of ? The mass of the atom is 262.1231u.
The binding energy per nucleon of is .
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A certain radionuclide is being manufactured in a cyclotron at a constant rate R. It is also decaying with disintegration constant. Assume that the production process has been going on for a time that is much longer than the half-life of the radionuclide. (a) Show that the numbers of radioactive nuclei present after such time remains constant and is given by. (b) Now show that this result holds no matter how many radioactive nuclei were present initially. The nuclide is said to be in secular equilibriumwith its source; in this state its decay rate is just equal to its production rate.
A neutron star is a stellar object whose density is about that of nuclear matter, . Suppose that the Sun were to collapse and become such a star without losing any of its present mass. What would be its radius?
(a) Which of the following nuclides are magic:? (b) Which, if any, are doubly magic?
Att = 0we begin to observe two identical radioactive nuclei that have a half-life of. At t = 1min, one of the nuclei decays. Does that event increase or decrease the chance that the second nucleus will decay in the next, or is there no effect on the second nucleus? (Are the events cause and effect, or random?)
A free neutron decays according to Eq. 42-26. If the neutron鈥揾ydrogen atom mass difference is 840, what is the maximum kinetic energypossible for the electron produced in neutron decay?
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