Positron

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Synopsis: Nuclear physics: Subatomic particles: Positron:

A tabletop device just 10 square metres in size can spit out energetic bursts of positrons as dense as those kicked out by the giant particle-factories at CERN.

Each positron-packed bullet lasts for just a fraction of a second so don't expect to fill the tank of your antimatter engine any time soon.

Instead Gianluca Sarri at Queen's university Belfast UK and colleagues used rapid laser bursts to make positrons in their smaller budget device.

so that it crashes into metal atoms releasing a jet of electrons and positrons. These particles are separated into two beams with magnets (Physical Review Letters doi. org/m2n.

because the bursts of positrons last just 30 femtoseconds (quadrillionths of a second). Despite their short duration the beams contain a quadrillion positrons per cubic centimetre says Sarri meaning they are comparable in density to the ones made at CERN.

In 2008 scientists at the Lawrence Livermore National Laboratory in California produced large quantities of antimatter by directing an extremely powerful laser at a tiny gold disc.

Also they produced streams of positrons that were extremely broad whereas our jet is a hundred times narrower

It only makes relatively light particles like positrons whereas to make an anti-atom you also need antiprotons

when positron particles emitted by the injected tracer interact inside the body. The team looked at an analysis approach using time-of-flight (TOF) information,

conventional MRI, the radiotracer carbon-13 (C-13) pyruvate and hyperpolarized MRI at a resolution of 2. 5 mm, Medipix positron detector, luminescence sensor,

Direct positron imaging is a nuclear medicine technique that allows researchers to gain physiological information from radiolabeled imaging agents that bind to targets in the body.

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