p40_037 - . 6 eV (13 . 6 eV) / (2) 2 = 10 . 2 eV. The...

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37. If kinetic energy is not conserved, some of the neutron’s initial kinetic energy is used to excite the hydrogen atom. The least energy that the hydrogen atom can accept is the diFerence between the ±rst excited state ( n = 2) and the ground state ( n = 1). Since the energy of a state with principal quantum number n is (13 . 6eV) /n 2 , the smallest excitation energy is 13
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Unformatted text preview: . 6 eV (13 . 6 eV) / (2) 2 = 10 . 2 eV. The neutron does not have sucient kinetic energy to excite the hydrogen atom, so the hydrogen atom is left in its ground state and all the initial kinetic energy of the neutron ends up as the nal kinetic energies of the neutron and atom. The collision must be elastic....
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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