Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 16, Problem 5Q
To determine
If electric force between the protons were somehow made stronger, then its effect on the temperature required for thermonuclear fusion.
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For overcoming the Coulomb barrier for fusion, methods other than heating the fusible material have been suggested. For example, if you were to use two particle accelerators to accelerate two beams of deuterons directly toward each other so as to collide head-on, (a) what voltage would each accelerator require in order for the colliding deuterons to overcome the Coulomb barrier? (b) Why do you suppose this method is not presently used?
Chapter 16 Solutions
Universe: Stars And Galaxies
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- In considering potential fusion reactions, what is the advantage of the reaction 2H+3H4He+n over the reaction 2H+2H3He+n ?arrow_forwardVerify that the total number of nucleons, and total charge are conserved for each of the following fusion reactions in the proton-proton chain. 1H+1H2H+e++ve 1H+2H3H+ and 3He+3He4He+1H+1H . (List the value of each of the conserved quantities before and after each of the reactions.)arrow_forward(a) Calculate the energy released in the neutroninduced fission reaction n+235U92Kr+142Ba+2n, given m(92Kr)=91.926269 and m(142Ba)=141.916361u. (b) Confirm that the total number at nucleons and total charge are conserved in this reaction.arrow_forward
- (a) Calculate the energy released in the neutron- induced fission n+238U96Sr+140Xe+3n , given m(96Sr)=95.921750uand m(140Xe)=139.92164 . This result is about 6 MeV greater than the result for spontaneous fission. Why? Confirm that the total number of nucleons and total charge are conserved in this reaction.arrow_forwardConfirm that charge, electron family number, and the total number of nucleons are all conserved by the rule for electron capture given in the equation ZAXN+eZ1AYN+1+ve. To do this, identify the values at each before and after the capture.arrow_forwardWhich of the following quantities represents the reaction energy of a nuclear reaction? (a) (final mass initial mass)/c2 (b) (initial mass final mass)/c2 (c) (final mass initial mass)c2 (d) (initial mass final mass)c2 (e) none of those quantitiesarrow_forward
- Enter the correct nuclide symbol in each open tan rectangle in Figure P43.25, which shows the sequences of decays in the natural radioactive series starting with the long-lived isotope uranium-235 and ending with the stable nucleus lead-207. Figure P43.25arrow_forward(a) Calculate the energy released in the a decay of 238U . (b) What fraction of the mass of a single 238U is destroyed in the decay? The mass of 234Th is 234.043593 u. (c) Although the fractional mass loss is large for a single nucleus, it is difficult to observe for an entire macroscopic sample of uranium. Why is this?arrow_forwardSuppose you have a pure radioactive material with a half-life of T1/2. You begin with N0 undecayed nuclei of the material at t = 0. At t=12T1/2, how many of the nuclei have decayed? (a) 14N0 (b) 12N0(C) 34N0 (d) 0.707N0 (e) 0.293N0arrow_forward
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