Differential scattering cross-section for a particles by Pb (Z=82) nucleus, provided that the initial energy of a particle is 11x10^-13 Joule and scattering angle is 30°:
1.8x10^-26 m^2
1.8x10^-26 km^2
1.8x10^-28 m2
1.8x10^-30 cm^2
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