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Consider the scattering of neutrons by protons at very low energy due to a nuclear potential of range r0. Given that, cot(kr0 + δ) ≈ -Ï’/k where δ is the phase shift, k the wave number and (-Ï’)the logarithmic derivative of the deuteron ground state wave function, the phase shift is
Options:
A .  Î´ ≈ -k/Ï’ - kr0
B .  Î´ ≈ -Ï’/k - kr0
C .  Î´ ≈ -Ï€/2 - kr0
D .  Î´ ≈ Ï€/2 - kr0
Answer: Option A


-NA-



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