A counter for the identi\ufb01cation and the energy determination of light charged particles and neutrons of energies in the range 20-100 MeV

A large area plastic scintillator counter is described which is used for identifying the mass of light charged particles (p, d, t) of 20\u2013100 MeV with a \u3b2-range-energy method, and for measuring their energies as well as that of neutrons of about the same energy by means of the time-of-flight method with a time resolution of 380 ps. The counter is used in an experiment concerning the stopped negative pion absorption in light nuclei. It could be used, however, in other experiments where the identification and the energy measurement of p, d, t, and n in the aforesaid energy range are required

Latest results from FENICE

The FENICE apparatus to measure the electromagnetic form factor of the neutron was built at the ADONE storage ring in Frascati and the reaction e+ e- > n nbar has been studied in the energy region between the threshold and 2.44 GeV in the center of mass. Preliminary results at 2.0 and 2.1 GeV have already been reported. New results are now available that confirm the eletromagnetic form factor of the neutron |Gn| not lower that proton form factor |Gp|

Measurement of the electromagnetic form factor of the proton in the time-like region

The cross section for the process e+e- >> p pbar has been measured in the s range 3.6–5.9 GeV2 by the FENICE experiment at the e+e− Adone storage ring and the proton electromagnetic form factor has been extracted

Some final results from the FENICE experiment

The first measurement of the neutron form factor in the time-like region has been produced in tha Fenice experiment by studying the e+ e- > n nbar reaction at the Adone storage ring.The most recent results at the energies of 1.92, 2.0, 2.1 GeV in the center of mass are reported in this paper

Recent results of the FENICE experiment

The most recent results from FENICE, an experiment at the ADONE e+e- storage ring, are reported in this pape

The Fenice Detector At the E+e- Collider Adone

The FENICE detector, installed at the Frascati e+e- storage ring ADONE, for measuring the neutron e.m. form factors in the timelike region, is described. FENICE is a nonmagnetic detector and consists of a complex array of scintillators, limited streamer tubes and iron converters for detecting mainly the process e+e- --> nnBAR. Antineutrons are identified by the charged prongs produced in their annihilation and the antineutron velocity is measured by the retrieved annihilation time with respect to the beam crossing time. Neutrons are detected in plastic scintillator layers. To reduce the cosmic rays background a concrete shield, covered by an active veto system, is added