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A neutron makes a head on elastic collision with a stationary deuteron . The fractional energy neutron in the collision is(1) 16/18(2) 8/9(3) 8/27 (4) 2/3 |
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Answer» Answer is (2) 8/9 ν1 = (m1 - m2)/(m1 + m2)u1 = [(m - 2m)/(m + 2m)]u = -u/3 Ei = (1/2) mu2, Ef = (1/2) m(-u/3)2 = 1/9 x (1/2) mu2. (Ei – Ef)/Ei = {1 – (1/9)}/1 = 8/9. |
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