Data di Pubblicazione:
2013
Citazione:
Positronium formation and decay in organic scintillators for neutrino detection / G. Consolati, D. Franco, D. Trezzi. - 733:(2013), pp. 306-309. (Intervento presentato al convegno 10th International Workshop on Positron and Positronium Chemistry, PPC-10 tenutosi a Smolenice Castle, svk nel 2011) [10.4028/www.scientific.net/MSF.733.306].
Abstract:
The detection of electron anti-neutrinos is generally carried out by searching for the coincidence of the reaction products, neutron and positron, in liquid scintillators. However, in these last a positron may form positronium (Ps) with an electron of the medium; efficiency of the process may be high. Furthermore, the triplet ground state sublevel (o-Ps) has lifetimes of a few ns. These features introduce distortions in the time distribution of the emitted photons, which is essential for position reconstruction and pulse shape discrimination algorithms in anti-neutrino experiments. This drawback can be favorably exploited by using o-Ps as a probe to detect anti-neutrinos in the scintillator. We report results of positron annihilation lifetime measurements in some organic liquid scintillators used for neutrino experiments. The o-Ps induced distortion of the scintillation photon emission time distribution may enhance the anti-neutrino detection. © (2013) Trans Tech Publications, Switzerland.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Antineutrino; Positronium; Scintillation detector
Elenco autori:
G. Consolati, D. Franco, D. Trezzi
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