The Magnetic Quenching of Positronium （Ps） in PMMA and Epoxy Polymers

Magnetic field quenching of positronium （Ps） has been studied in PMMA and Epoxy polymers using in the positron lifetime spectroscopy. The mixing state of ortho-positronium o-Ps （m=0） state and para-positronium p-Ps（m=0） state in the field rang 0-25KG was observed. We have been obtained the zero-field hypefine splitting of positronium "ΔE" by the mixing parameter "a". The "a" is determined by the annihilation rates of the positronium.