Question

The energy spectra of these particles are measured with plastic-covered spheres of BF3 named Tom W. Bonner. (20[1])Radiation of these (20[1])particles displaces lattice atoms in (20[1])Wigner’s (20[1])disease. The reproduction factor of these particles is denoted “eta” in Fermi’s four-factor formula. (20[3])A beryllium tamper is (20[1])used (20[2])to counteract (20[1])thermal expansion and increase the reflection of these (20[1])particles. (20[2])These particles are (20[1])(*) “prompt” if their emission is immediate, and decelerate from “fast” to “thermal” (10[1])in heavy water, (10[2])which moderates (10[3])these (10[1])particles (10[1])in reactors. (10[5])Firing (10[1])these particles (10[1])at a fissile (10[1])isotope is used to initiate nuclear chain reactions. (10[2])For 10 points, name these nucleons with no charge. (10[2])■END■ (10[1])

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