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orthopositronium

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orthopositronium [¦ȯr·thō‚päz·ə′trō·nē·əm]
(particle physics)
The state of positronium in which the positron and electron have parallel spins.
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The pick-off lifetime of orthopositronium, o-Ps, is correlated to the free volume hole size in polymers (6).
Free volume changes in mechanically milled PS and PC studied by ... by Gunther-Schade, K.; Castricum, H.L.; Ziegler, H.J.; Bakker, H.; Faupel, F. / Polymer Engineering and Science
Unlike a stable hydrogen atom, orthopositronium lasts only for about 140 nanoseconds, before its components annihilate each other in a burst of pure energy.
Through the Looking Glass by COWEN, RON / Science News
If the frequency of the density fluctuation is slower than the positron or orthoPositronium (oPs) annihilation frequency ([similar to][10.
Compatibilized linear low-density polyethylene isotactic ... by Flaris, V.; Zipper, M.D.; Simon, G.P.; Hill, A.J. / Polymer Engineering and Science
 
 
 
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