The use of low-density hydrogen targets is demonstrated experimentally to be a new way of selecting protonium (ppBAR atom) annihilations with initial angular momentum L=1. The mean value and the width of the time distributions which occur between protonium formation and annihilation have been measured at room temperature at 8.2, 4.1, 2.1 mbar. They are (110+/-10; 45+/-5), (145+/-15; 82+/-9) and (210+/-25; 125+/-9) ns, respectively. RI Galli, Domenico/A-1606-2012; Iazzi, Felice/F-4490-2012; Villa, Mauro/C-9883-2009

PROTONIUM ANNIHILATION IN P-WAVE USING LOW-DENSITY (RHO/RHO-0-APPROXIMATE-TO-10(-3)) HYDROGEN TARGETS - MEASUREMENTS OF CASCADE TIMES AND WIDTHS

PUDDU, GIOVANNA;USAI, GIANLUCA;
1992-01-01

Abstract

The use of low-density hydrogen targets is demonstrated experimentally to be a new way of selecting protonium (ppBAR atom) annihilations with initial angular momentum L=1. The mean value and the width of the time distributions which occur between protonium formation and annihilation have been measured at room temperature at 8.2, 4.1, 2.1 mbar. They are (110+/-10; 45+/-5), (145+/-15; 82+/-9) and (210+/-25; 125+/-9) ns, respectively. RI Galli, Domenico/A-1606-2012; Iazzi, Felice/F-4490-2012; Villa, Mauro/C-9883-2009
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/96428
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 22
social impact