Question

in beta- decay, a
a) neutron converts into a proton emitting antineutrino.
b) neutron converts into a proton emitting neutrino.
c) proton converts into a neutrino emitting antineutrino.
d) proton converts into a neutron emitting neutrino.

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Answer 1

Answer:

In nuclear physics, beta decay (β-decay) is a type of radioactive decay in which a beta particle (fast energetic electron or positron) is emitted from an atomic nucleus, transforming the original nuclide to an isobar. For example, beta decay of a neutron transforms it into a proton by the emission of an electron accompanied by an antineutrino; or, conversely a proton is converted into a neutron by the emission of a positron with a neutrino in so-called positron emission. Neither the beta particle nor its associated (anti-)neutrino exist within the nucleus prior to beta decay, but are created in the decay process. By this process, unstable atoms obtain a more stable ratio of protons to neutrons. The probability of a nuclide decaying due to beta and other forms of decay is determined by its nuclear binding energy. The binding energies of all existing nuclides form what is called the nuclear band or valley of stability.[1] For either electron or positron emission to be energetically possible, the energy release (see below) or Q value must be positive.

Answer 2

Answer :

➤ In ß(-) decay (electron emission), the particle emitted along with electron is anti-neutrino$\sf{(\bar{\nu})}.$

➤ On the other hand, the particle emitted in ß(+) decay (positron emission) is neutrino$\sf{(\nu)}.$

• Neutrino and anti-neutrino are a particle-antiparticle pair.
• There are anti particles associated with every particle.

Hence, (A) is the correct answer.

Explore More :

• Elementary particles are grouped as baryons, mesons, letans.
• Nucleons (protons and neutrons) and their higher counterparts are called baryons.
• This pions, kaons, etc., are mesons.
• Baryons and mesons are together called hadrons which can interact through strong nuclear force.
• Electrons, neutrinos and their higher mass counterparts are called leptons.
• Leptons do not experience the strong force, only the weak force is dominant between them.

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