Solution: Antineutrino. In beta decay, a nucleus emits an
Chapter 8, Problem 8.89(choose chapter or problem)
Antineutrino. In beta decay, a nucleus emits an electron. A 210Bi (bismuth) nucleus at rest undergoes beta decay to 210Po (polonium). Suppose the emitted electron moves to the right with a momentum of 5.60 * 10-22 kg # m>s. The 210Po nucleus, with mass 3.50 * 10-25 kg, recoils to the left at a speed of 1.14 *103 m>s. Momentum conservation requires that a second particle, called an antineutrino, must also be emitted. Calculate the magnitude and direction of the momentum of the antineutrino that is emitted in this decay.
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