Word: gammas
(lookup in dictionary)
(lookup stats)
Dates: during 1990-1999
Sort By: most recent first
(reverse)
...long, 6-ft.-high machines generate a cloud of neutrons that penetrate the luggage. These combine with the nitrogen in plastic explosives to generate gamma rays; an array of detectors identifies the substance. But other items containing nitrogen, including wool sweaters and padded ski boots, can set off warnings. The manufacturer, Science Applications International Corp. of San Diego, says the false alarms can be reduced with further experience. At the moment, says FAA administrator James Busey, "we have no other system available...