Identify the process.

The process involved is radioactive decay (also known as nuclear decay). This is a process where an unstable atomic nucleus loses energy by emitting radiation, such as gamma rays.
The type of nuclear process involved is:

$$\boxed{\text{Radioactive decay}}$$

Besides medical imaging, gamma rays are used for:

• Sterilization: They can kill bacteria and viruses, making them useful for sterilizing medical equipment, food products, and even mail.
• Cancer treatment (radiotherapy): High-energy gamma rays can be precisely directed to destroy cancerous cells. Another function of the energy emitted (gamma rays) is:

$$\boxed{\text{Sterilization of medical equipment or food}}$$

Gamma rays are a form of ionizing radiation, which means they have enough energy to remove electrons from atoms and molecules in living tissue. This can lead to:

• Cell damage: Ionization can damage DNA, leading to cell malfunction or death.
• Increased cancer risk: Repeated or high exposure can cause mutations in DNA, increasing the likelihood of developing cancer.

To mitigate these dangers, measures include:

• Shielding: Using dense materials like lead or concrete to absorb gamma radiation.
• Limiting exposure time: Minimizing the duration of exposure to the radiation source.
• Increasing distance: Maintaining a safe distance from the source, as radiation intensity decreases significantly with distance. A danger arising from gamma rays and its mitigation is:

$$\boxed{\text{Danger: Cell damage and increased cancer risk due to ionization. Mitigation: Use lead shielding, limit exposure time, and maintain distance from the source.}}$$