Word: neutron
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...more than $1 million each, thermal neutron analysis systems are designed to spot plastic explosives that can elude most other inspections. The FAA has installed TNA machines at two airports, New York City's Kennedy and Miami International, and plans to require U.S. airlines to purchase 150 of them, at a cost of $175 million. But the presidential commission contends that the machines are duds: if set to find a small bomb like the one that shattered Pan Am Flight 103 (apparently between 1 and 2 lbs.), they produce excessive false alarms...
...times as sensitive as existing gravity-wave detectors. That should be enough not only to confirm relativity but also to probe deeply into the most violent processes in the cosmos, including ) exploding supernovas, collisions between black holes, and "starquakes" on the semisolid surfaces of neutron stars. All of these phenomena are believed to send out characteristic bursts of gravity waves. Says Rochus Vogt, the Caltech physics professor who heads the joint M.I.T.-Caltech team that will build LIGO: "We are going to look at a whole new force as a transmitter of signals from the universe. That is bound...
...accident would not discharge radioactive substances into the atmosphere. Existing aboveground reactors should be protected by reliable containment structures. The first priority should be to safeguard atomic plants that supply power and heat to large cities, reactors with graphite moderators like the one that malfunctioned at Chernobyl, and fast-neutron breeder reactors...
...their skill at finding and analyzing such bizarre objects as black holes, neutron stars and quasars, astronomers have so far failed to solve one of the most basic mysteries of the cosmos: What does the universe look like? The heavens appear just as two dimensional through powerful modern telescopes as they did to the eyes of the ancient Greeks, and until recently, no one could say for sure whether the myriad galaxies were organized in some meaningful way. Astrophysicists are fiercely competing to discover how the universe evolved into its present structure, but they cannot test their theories until they...
Jones said that Gai has an extremely sensitive neutron detector which would help them better understand the way the neutrons are emitted from the reactions. The latest studies indicate that the neutrons are emitted in sharp bursts, a phenomenon for which there is yet no explanation...