Patent 8941075 was granted and assigned to PROPORTIONAL TECHNOLOGIES, INC. on January, 2015 by the United States Patent and Trademark Office.
A system for detecting fissile materials which utilizes boron coated straw detectors in which the straws have non-circular cross sections. Embodiments include straws having star shaped cross sections of various configurations including a six pointed star. The system can include tubular housings having one or more shaped straws stacked within the housings.