Abstract
A combined arrangement of counters and a cloud chamber is used to examine the elastic large-scale scattering of β-particles of approximately 1 MeV. energy by nitrogen nuclei. In a total effective track length of nearly 100 km., 131 photographs were obtained in which the scattering angle exceeded 85°. Considering the present results on large-angle scattering together with earlier results on the scattering at smaller angles, the agreement between experiment and Mott's theory is good over the entire angular range 20-180°.

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