positronium

The positron preferentially forms and annihilates from a bound state called positronium (Ps).

The increased sensitivity of J-PET with respect to previous discrete symmetry tests with o-Ps[right arrow]3[gamma] is achieved by a large geometrical acceptance and angular resolution of the detector as well as by improved control of the positronium atoms polarization.

Under given circumstances, both particle and antiparticle can form a bound state, called positronium (Ps) [23].

We attempt to validate our theory by exploring the hydrogenoid atomic model with mass-ratio varying by three orders of magnitude to include the hydrogen, muonium and positronium atoms.

Among his topics are the diffraction of particles in polarized crystals, positronium and muonium spin rotation and oscillations, the phenomenon of time-reversal violating magnetic field generation by a static electric field and electric field generation by a static magnetic field, spin rotation of particles moving in bent crystals and measuring the magnetic moment of short-lived particles and nuclei, and synchrotron-type radiation processes in crystals and polarization phenomena accompanying them.

Pethrick, "Positronium annihilation studies of polycarbonate, polyethersulphone and polysulphone," European Polymer Journal, vol.

This is done to eliminate the possibility of the trapping of positrons and quenching of positronium (the metastable bound state of the positron and an electron) by the air and gases otherwise getting trapped within the powdered sample [13].

In the lab, the researchers took the first step towards measuring the free fall of "positronium" - a bound state between a positron and an electron.