Legrende polynomials The amplitude of a stray wave is defined by: SO) =x(21+ 1) exp lô] sen ô, P(cos 0). INO Here 0 is the scattering angle, l is the angular momentum and 6, is the phase shift produced by the central potential that performs the scattering. The total cross section is: Show that: 'É4+ 1)sen² 8, .
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