Why is it found experimentally difficult to detect neutrinos in nuclear `beta`-decay?

Explanation

### Step-by-Step Solution:

1. **Understanding Beta Decay**:
- In nuclear beta decay, a neutron in an unstable nucleus is transformed into a proton, emitting a beta particle (an electron or positron) and a neutrino.
- The reaction can be represented as:
\[ n \rightarrow p + e^- + \bar{\nu}_e \]
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