These particles are found in cosmic rays, where the anomalously large fraction observed by PAMELA in 2008 has led scientists to speculate a primary source other than the interstellar medium. Applicati
These particles are found in cosmic rays, where the anomalously large fraction observed by PAMELA in 2008 has led scientists to speculate a primary source other than the interstellar medium. Applications of these particles include a namesake emission tomography that detects the gamma rays they emit upon annihilation. Discovered by Anderson in 1932, one of these particles and a neutrino are among the products of beta positive decay and Dirac theorized their existence as negative energy solutions to his namesake equation. For 10 points, name these positively-charged fermions, antiparticles of electrons.
These particles are found in cosmic rays, where the anomalously large fraction observed by PAMELA in 2008 has led scientists to speculate a primary source other than the interstellar medium.