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A little old but a lot of awesome:
Fragile particles rarely seen in our Universe have been merged with ordinary electrons to make a new form of matter. Di-positronium, as the new molecule is known, was predicted to exist in 1946 but has remained elusive to science… The discovery, reported in the journal Nature, is a key step in the creation of ultra-powerful lasers known as gamma-ray annihilation lasers. “The difference in the power available from a gamma-ray laser compared to a normal laser is the same as the difference between a nuclear explosion and a chemical explosion,” said Dr David Cassidy of the University of California, Riverside, and one of the authors of the paper. “It would have an incredibly high power density.” As a result, there is a huge interest in the technology from the military as well as energy researchers who believe the lasers could be used to kick-start nuclear fusion in a reactor.
We think they should mount them on autonomous robots and see what happens. If the robots form an army and destroy all of humanity, at least we’ll go out in an explosion of pure awesome.
Dr Cassidy believes that increasing the density of the positronium in the silicon would create an exotic state of matter known as a Bose-Einstein condensate (BEC).
Bose-Einstein condensate are like a super-atom
BECs are usually produced by supercooling atoms so that they merge and begin to behave like one giant atom.
They have been used in many experiments such as the 2003 Harvard study in which scientists were able to trap light.
"At even higher densities, one might expect the material to become a regular, crystalline solid," wrote Professor Clifford Surko, of the University of Californian, San Diego, in an accompanying article.
Taking it one step further, scientists could use the spontaneous annihilation of the BEC, and the subsequent outburst of gamma-rays, to make a powerful laser.
"A gamma-ray laser is the kind of thing that if it existed people would find new uses for it everyday," said Dr Cassidy.
He highlighted an experiment at the National Ignition Facility (NIF) in the US where scientists envisage using 192 lasers to heat a fuel target to try to kick-start nuclear fusion.
"Imagine doing that but you no longer need hundreds of lasers," he said.
It has been known for many years that an electron and its antiparticle, the positron, may together form a metastable hydrogen-like atom, known as positronium or Ps. In 1946, Wheeler speculated that two Ps atoms may combine to form the di-positronium molecule (Ps2), with a binding energy of 0.4 eV. More recently, this molecule has been studied theoretically; however, because Ps has a short lifetime and it is difficult to obtain low-energy positrons in large numbers, Ps2 has not previously been observed unambiguously. Here we show that when intense positron bursts are implanted into a thin film of porous silica, Ps2 is created on the internal pore surfaces. We found that molecule formation occurs much more efficiently than the competing process of spin exchange quenching, which appears to be suppressed in the confined pore geometry. This result experimentally confirms the existence of the Ps2 molecule and paves the way for further multi-positronium work. Using similar techniques, but with a more intense positron source, we expect to increase the Ps density to the point where many thousands of atoms interact and can undergo a phase transition to form a Bose–Einstein condensate. As a purely leptonic, macroscopic quantum matter–antimatter system this would be of interest in its own right, but it would also represent a milestone on the path to produce an annihilation gamma-ray laser.
Originally posted by AnteBellum
reply to post by dainoyfb
It may be an example of some other laser, I don't believe it is Fermi.
It was posted along with the first Link in my post.
It has no further explanation.
Good question. . .
Gamma-ray bursts can release more energy in 10 seconds than the Sun will emit in its entire 10 billion-year lifetime! So far, it appears that all of the bursts we have observed have come from outside the Milky Way Galaxy. Scientists believe that a gamma-ray burst will occur once every few million years here in the Milky Way, and in fact may occur once every several hundred million years within a few thousand light-years of Earth
13 more things: MAGIC results
Originally posted by Drunkenparrot
Originally posted by AnteBellum
reply to post by dainoyfb
It may be an example of some other laser, I don't believe it is Fermi.
It was posted along with the first Link in my post.
It has no further explanation.
Good question. . .
It looks to be the MAGIC gamma-ray telescope on La Palma in the Canary Islands...