SOLVE FOR BETA TO THE NEAREST (500) cos(B)+259.81=0 HUNDREDTH:
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- A point source of thermal neutrons is placed at the centre of a large sphere of beryllium. Deduce the spatial distribution of neutron density in the sphere. Estimate what its radius must be if less than 1% of the neutrons are to escape through the surface. Find also the neutron density near the surface in this case in terms of the source strength. At. Wt of beryllium = 9 Density of beryllium = 1.85 g/cc Avagadro number = 6 x 1023 atoms/g atom Thermal neutron scattering cross-section on beryllium = 5.6 barns Thermal neutron capture cross-section on beryllium 10 mb (at velocity v = 2,200 m/s) =What would the BEN in MeV be for a nucleus with 100 protons, 149 neutrons and an atomic mass of 227.4 u? Round your answer to 1 decimal place.3. a) Alpha particles of the same initial speed are shot at the same intensity toward gold, silver, and aluminum foils of the same thickness. They are observed at a detector at a fixed scattering angle, 0 0°. What would the ratios of the number of alpha particles scattered by the gold and silver foils to the aluminum foil, No Au 13). NaAl and respectively, be? (ZAu = 79, ZAg = 47, ZAI Na Ag NaAl b) Compare the number of a particles of fixed kinetic energy scattered through an angle of 10° (call this Na(10°)) with the number scattered through an angle of 20° (Na (20°)) for Rutherford scattering by a thin gold foil of fixed thickness. Compute Na (10⁰) Na (20°). p2 Rutherford's scattering model assumes that the alpha particles experience a Coulomb repulsion, F = KqZe from the nucleus of the foil's atom. If, in a head-on collision the alpha particle has enough energy to get inside a uniformly charged Kqa Zer nucleus of radius R, the force law would change to F = R³ " point-nucleus…
- In class I derived the ordinary nuclear density to be about 0.138 u/fm3. A neutron star is a collapsed star that contains neutrons in a highly compactified state, so its average density is higher. Assume a neutron star is spherical and has an average density which is about twice the ordinary nuclear density. If it is 50% heavier than the Sun, what would be its radius? (Given: mass of sun = 2*1030 kg, 1 u = 1.66*10-27 kg.) A) 14.6 km B) 11.6 km C) 10.1 km D) none of these.3Compute the approximate nuclear radius of: (b) Nitrogen-14