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A 5.00 Mev proton beam is available to produce neutrons from the reaction Li(p. n)Be A neutron beam of 1.75Mev is needed for a

A 5.00 Mev proton beam is available to produce neutrons from the reaction "Li(p. n)Be A neutron beam of 1.75Mev is needed for a particular experiment. (a) In what direction relative to the incident beam should we look to find 1.75-MeV neutrons? (b) If we extract the neutrons through a 1 cm aperture located 10 cm. from the reaction target. what will be the energy spread of the neutron beam?

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