Positrons in a sentence

Despite years of research, it is not known what kind of matter astrophysical jets are composed of — whether they are made of bare electrons or protons or whether positively charged electrons called positrons are also present.

By colliding positrons and electrons at a specific, tunable energy, muon-antimuon pairs could be produced at will.

Moving at close to the speed of light, the matter generates powerful jets of plasma containing electrons and positrons that ricochet off the event horizon and get hurled outward along the black hole’s axis of rotation.

The rays could from collisions between electrons and their antimatter partners, positrons.

Antineutrinos with an energy above the threshold of main caused charged current interactions with the protons in the water, producing positrons and neutrons.

A similar process happened at about 1 second for electrons and positrons.

A source (center) sends particles toward two observers, electrons to Alice (left) and positrons to Bob (right), who can perform spin measurements.

At higher energies, up to 500 GeV, the ratio of positrons to electrons begins to fall again.

By means of a special array of magnets the accelerated positrons could now be brought onto a slalom course.

Frédéric and Irène Joliot-Curie in Paris had evidence of positrons in old photographs when Anderson's results came out, but they had dismissed them as protons.

In QED there are two types of particles: electrons/positrons (called fermions ) and photons (called gauge bosons ).

In recent years, complete atoms of antimatter have been assembled out of antiprotons and positrons, collected in electromagnetic traps.

In this system the matter (electrons and positrons) is destroyed and changed to non-matter energy (the photons).

Likewise, positron-electron pairs annihilated each other and emitted energetic photons: : + ↔ + An equilibrium between electrons, positrons and photons was maintained during this phase of the evolution of the Universe.

Positrons may be generated by positron emission radioactive decay (through weak interactions ), or by pair production from a sufficiently energetic photon which is interacting with an atom in a material.

Positrons were detected at a higher rate and in greater density than ever previously detected in a laboratory.

Preliminary results from the presently operating Alpha Magnetic Spectrometer (AMS-02) on board the International Space Station show that positrons in the cosmic rays arrive with no directionality, and with energies that range from 10 GeV to 250 GeV.

Since the charge of one electron is known to be about −main, citation −1 C can also be considered the charge of roughly main (or +1 C the charge of that many positrons or protons), where the number is the reciprocal of main.

The cosmic radiation at sea level usually manifests as 511 keV gamma rays from annihilation of positrons created by nuclear reactions of high energy particles and gamma rays.

The presence of the resulting antimatter is detectable by the two gamma rays produced every time positrons annihilate with nearby matter.