* Parent Nuclide: Copper-66 (⁶⁶Cu)

* Daughter Nuclide: Zinc-66 (⁶⁶Zn)

* Decay Particle: Beta-minus particle (electron, e⁻) and an antineutrino (ν̅ₑ)

The Nuclear Reaction:

⁶⁶Cu → ⁶⁶Zn + e⁻ + ν̅ₑ

Explanation:

* Beta-minus decay occurs when a neutron within the nucleus transforms into a proton, emitting an electron (beta-minus particle) and an antineutrino.

* This process increases the atomic number by 1 (from copper, Z=29, to zinc, Z=30) while keeping the mass number the same.

* The emitted electron carries away energy, which can be measured and used to identify the decay.

Additional Information:

* Copper-66 has a half-life of about 5.1 minutes.

* It's often used in medical imaging and research due to its short half-life and the ability to target specific tissues and organs.

Let me know if you have any more questions about beta decay or nuclear processes!