Positronium cooling in porous silica measured via Doppler spectroscopy

We have measured the kinetic energy of positronium (Ps) atoms emitted into a vacuum from a porous silica film subsequent to positron bombardment, via the Doppler spread of the linewidth of the Ps 1{sup 3}S-2{sup 3}P transition. We find that the deeper in the target film that positrons are implanted...

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Veröffentlicht in:	Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2010-01, Vol.81 (1), Article 012715
Hauptverfasser:	Cassidy, D. B., Crivelli, P., Hisakado, T. H., Liszkay, L., Meligne, V. E., Perez, P., Tom, H. W. K., Mills, A. P.
Format:	Artikel
Sprache:	eng
Schlagworte:	ANTILEPTONS ANTIMATTER ANTIPARTICLES ATOMIC AND MOLECULAR PHYSICS ATOMS COLLISIONS CONFINEMENT CONVERSION COOLING ELEMENTARY PARTICLES ENERGY ENERGY LEVELS ENERGY RANGE EXCITED STATES FERMIONS KINETIC ENERGY LASERS LEPTONS MATERIALS MATTER MEV RANGE MINERALS OXIDE MINERALS POROUS MATERIALS POSITRONIUM POSITRONS PULSES SILICA SPECTROSCOPY SURFACES
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