1 The isotope 235U decays by alpha emission with a half-life of 7.0 x 10° y. It also decays (rarely) by spontaneous fission, and if the alpha decay did not occur, its half-life due to spontaneous fission alone would be 3.0 x 1017 y. (a) At what rate do spontaneous fis- sion decays occur in 1.0 g of 235U? (b) How many 23U alpha-decay events are there for every spontaneous fission event?

1 The isotope 235U decays by alpha emission with a half-life of 7.0 x 10° y. It also decays (rarely) by spontaneous fission, and if the alpha decay did not occur, its half-life due to spontaneous fission alone would be 3.0 x 1017 y. (a) At what rate do spontaneous fis- sion decays occur in 1.0 g of 235U? (b) How many 23U alpha-decay events are there for every spontaneous fission event?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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B1
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Find the mass energy released in the alpha decay of Ac-220. atomic mass of 220 Ac = 220.014763 u; 89 atomic mass of 216 Fr = 216.003198 u; 87 atomic mass of He = 4.002603 u; u = 931.5 MeV/c^2. (in MeV) OA: 0.898 OB: 1.302 OC: 1.888 OD: 2.738 OE: 3.971 OF: 5.757 OG: 8.348 OH: 12.105
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