Pauli suggested the emission of nutrino during `beta^+` decay to explain

Options

A. Continuous energy distribution positrons
B. Conservation of linear momentum
C. Conservation of mass -energy
D. All of these

Answer

To solve the question regarding Pauli's suggestion about the emission of neutrinos during beta decay, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Beta Decay**:
- Beta decay is a type of radioactive decay in which a beta particle (an electron or a positron) is emitted from an atomic nucleus. In the case of beta-plus (β+) decay, a proton is transformed into a neutron, emitting a positron and a neutrino.

2. **Pauli's Proposal**:
- In 1930, Wolfgang Pauli proposed the existence of a new particle, the neutrino, to account for the missing energy and momentum in beta decay processes. He suggested that this particle was emitted alongside the beta particle.

3. **Conservation Laws**:
- One of the key reasons for introducing the neutrino was to satisfy the conservation laws of physics. In beta decay, the total energy, momentum, and angular momentum must be conserved. The emission of the neutrino allows for these conservation laws to hold true because it carries away some of the energy and momentum that would otherwise be unaccounted for.

4. **Characteristics of Neutrinos**:
- Neutrinos are neutral particles with a very small mass (possibly zero). They interact very weakly with matter, which makes them difficult to detect.

5. **Conclusion**:
- Given the options provided in the question, Pauli's suggestion of the emission of neutrinos during beta decay was primarily to explain the conservation of energy, momentum, and angular momentum. Therefore, the correct answer is that Pauli suggested the emission of neutrinos during beta decay to explain all of these conservation laws.

### Final Answer:
The correct option is **all of these** (which includes the conservation of energy, momentum, and angular momentum).

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