Process of Gamma Radiation Sterilization

Gamma treatment is an ionization sterilization process, meaning it works by energy absorption.

The process is simple and completely safe: products are transported in their final packaging, either by parcel or pallet, on an automated conveyor system programmed to move at a specific speed according to the previously determined exposure time required.

The conveyor passes through a concrete cell with walls 2 meters thick, inside of which is Cobalt 60 (a radioactive source) whose activity produces radiation for a limited duration. For optimal safety, Cobalt 60 is sealed in a double-layer stainless steel container and suspended above a water pool. When in “rest” mode, the cobalt is submerged in 7 to 8 meters of water to contain the radiation.

The products pass under the rays for the necessary time to achieve perfect sterilization—the exposure dose is calculated by us based on the nature of the products and their characteristics, following the applicable validation standards such as ISO 11137-2.

A Safe Process with Multiple Advantages

Gamma sterilization offers a double advantage: it can treat large volumes of packaged products in just a few hours without requiring a dynamic aeration phase before they are made available.

Gamma irradiation is a completely safe process, carried out at room temperature without any chemical additives. Since the method leaves no chemical residues on the products, there is no need for storage; they are delivered to you as soon as quality checks are completed. This saves you both time and money.

Moreover, gamma is compatible with a wide variety of materials and products (such as beverage and medication packaging, medical devices, pharmaceuticals, cosmetics, veterinary products…) and can be used to treat products with packaging of varying dimensions simultaneously. This makes it an ideal solution for professionals.

IONISOS: Tailored Support for Premium Results

Founded in 1993 from the merger of Conservatome (established in 1956) and Amphytrion, the IONISOS group works daily with players in the medical, pharmaceutical, cosmetic, and agri-food sectors.

More than just a service provider, we offer long-term support with personalized follow-up. From your first order, a dedicated contact person advises you based on your needs and the nature of your products. This person will oversee all your projects, regardless of the technique applied. Our goal: to provide you with ever higher service quality and anticipate your needs.

IONISOS operates 4 specialized sites for gamma radiation treatment (3 in France, 1 in Estonia). With a state-of-the-art logistics system, each center is capable of handling large volumes and delivering them on schedule.

Validations and quality controls are carried out on-site in our laboratories, in strict compliance with current standards. Our facilities are subject to rigorous inspections.