What type of food irradiation is ideal for ground beef patties?

• A. X-rays
• B. Gamma Rays
• C. Electron Beam
• D. Ultraviolet

Answer: (C)

When selecting irradiation for a product, the key is how the radiation can reach all parts of the item quickly in a production setting. Ground beef patties are relatively thin and processed in a continuous line, so you want a method that delivers a high dose rapidly without leaving behind residual radioactivity or requiring bulky, source-heavy equipment.

Electron beam irradiation uses an accelerator to shoot fast electrons directly into the product as it passes through a beam. This gives a high dose rate and is well suited to in-line processing of thin, uniform foods like patties. With appropriate energy and scanning or conveyor setup, the interior of the patties can receive a uniform dose, effectively inactivating surface and proximal pathogens without the need for a radioactive source. It also offers on/off control and generally lower ongoing regulatory burden compared to radioactive gamma sources.

Ultraviolet can only disinfect surfaces and won’t reach microbes inside a patty. Gamma rays and X-rays penetrate more deeply, but gamma sources involve radioactive materials and more handling and safety considerations, making them less flexible for high-volume, in-line processing of this type of product.