Abstract

The depolarization parameter D (θ) in elastic scattering of 1.36 MeV neutrons was measured at θ 2 =30°, 38°, 80°, 120° and 150° for 27 Al, 59 Co, 63,65 Cu, 209 Bi and Ni nuclei. The departure of D (θ) from unity for Al, Co, Cu and Bi was observed particularly at backward angles, but not observed for Ni. This fact shows that the spin flip of incident neutrons takes place along the normal to the scattering plane in the elastic scattering process for non-zero spin targets. These results are discussed in the light of different nuclear reaction mechanisms.

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