1231_Physics ProblemsTechnical Physics

1231_Physics ProblemsTechnical Physics - 572 Nuclear...

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572 Nuclear Structure P44.3 (a) Fk QQ r e == × × × = 12 2 9 19 2 14 2 899 10 261 6 0 1 0 100 10 27 6 . . . . Nm C C m N 22 ej af (b) a F m × 27 6 10 417 10 27 27 . . N 6.64 kg ±ms 2 away from the nucleus. (c) Uk r e × × × = 9 19 2 14 13 2616 0 276 10 173 . . . .. C m J M e V P44.4 E α = 770 . M e V (a) d kZ e mv e E ee min === ×× × = 42 2 8 99 10 79 1 60 10 7 70 1 60 10 29 5 10 29 5 2 2 2 91 9 2 13 15 m f m (b) The de Broglie wavelength of the is λ αα = × = −− h mv h mE 2 6626 10 2 6 64 10 7 70 1 60 10 518 10 518 34 27 13 15 . . f m . (c) Since is much less than the distance of closest approach , the may be considered a particle. P44.5 (a) The initial kinetic energy of the alpha particle must equal the electrostatic potential energy at the distance of closest approach. KU kqQ r
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