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52 Under certain rare circumstances, a nucleus can decay by emitting a particle more massive than an alpha particle. Consider the decays 223Ra - 20Pb + 14C and 223Ra - 21°RN + 4He. Calculate the Q value for the (a) first and (b) second decay and determine that both are energetically possible. (c) The Coulomb barrier height for alpha-particle emission is 30.0 MeV. What is the barrier height for 14C emission? (Be careful about the nuclear radii.) The needed atomic masses are 223Ra 223.018 50 u 14C 14.003 24 u 209Pb 208.981 07 u "He 4.002 60 u 219Rn 219.009 48 u

52 Under certain rare circumstances, a nucleus can decay by emitting a particle more massive than an alpha particle. Consider the decays 223Ra - 20Pb + 14C and 223Ra - 21°RN + 4He. Calculate the Q value for the (a) first and (b) second decay and determine that both are energetically possible. (c) The Coulomb barrier height for alpha-particle emission is 30.0 MeV. What is the barrier height for 14C emission? (Be careful about the nuclear radii.) The needed atomic masses are 223Ra 223.018 50 u 14C 14.003 24 u 209Pb 208.981 07 u "He 4.002 60 u 219Rn 219.009 48 u

College Physics
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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52 Under certain rare circumstances, a nucleus can decay by emitting a particle more massive than an alpha particle. Consider the decays 223Ra - 20Pb + 14C and 223Ra - 21°RN + 4He. Calculate the Q value for the (a) first and (b) second decay and determine that both are energetically possible. (c) The Coulomb barrier height for alpha-particle emission is 30.0 MeV. What is the barrier height for 14C emission? (Be careful about the nuclear radii.) The needed atomic masses are 223Ra 223.018 50 u 14C 14.003 24 u 209Pb 208.981 07 u "He 4.002 60 u 219Rn 219.009 48 u
Transcribed Image Text:52 Under certain rare circumstances, a nucleus can decay by emitting a particle more massive than an alpha particle. Consider the decays 223Ra - 20Pb + 14C and 223Ra - 21°RN + 4He. Calculate the Q value for the (a) first and (b) second decay and determine that both are energetically possible. (c) The Coulomb barrier height for alpha-particle emission is 30.0 MeV. What is the barrier height for 14C emission? (Be careful about the nuclear radii.) The needed atomic masses are 223Ra 223.018 50 u 14C 14.003 24 u 209Pb 208.981 07 u "He 4.002 60 u 219Rn 219.009 48 u
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