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Unformatted text preview: luu (nml299) – HW12 – markert – (58710) 1 This print-out should have 10 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points One naturally occuring reaction in a radioac- tive decay process is nitrogen-12 (atomic num- ber 7) decaying into carbon-12 (atomic num- ber 6) plus an unknown particle. What is the atomic mass of this unknown particle? 002 10.0 points A proton and an antiproton, both at rest with respect to one another, mutually annihilate into two gamma rays. How much energy is produced in this an- nihilation?( Hint: How are mass and energy related to one another?) Answer in units of joules. 003 10.0 points How much total kinetic energy will an electron-positron pair have if produced by a photon of energy 2 . 81 MeV? Answer in units of MeV. 004 10.0 points A photon with an energy of 2 . 09 GeV creates a proton-antiproton pair in which the proton has a kinetic energy of 95 MeV. The rest energy of the proton is...
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This note was uploaded on 09/22/2010 for the course PHY 58710 taught by Professor Markert during the Spring '09 term at University of Texas.
- Spring '09