Patent ID: 7486771

Claim:
A method for irradiating in an irradiation chamber products being stored in the form of pallets or in the form of bulk material in containers with a high energy x-ray beam source, the method comprising: placing the products onto two different levels of products, so that a first set of products is placed on an upper level and a second set of products is placed on a lower level; irradiating both sets of products during a first period of time by directing the x-ray beam source to the products from about mid-height of the products on the lower level to about mid-height of the products on the upper level; switching the products placed on the two levels to make a new arrangement so that the set of products irradiated on the upper level during the first time period are placed on the lower level and the set of products irradiated on the lower level during the first time period are placed on the upper level; and irradiating during a second period of time the new arrangement formed of the two switched sets of products by directing the x-ray beam source to the products from about mid-height of the products on the lower level to about mid-height of the products on the upper level.