The long history of the research concerning the possible existence of bound or resonant
states in light multineutron systems, essentially^ 3 3 n and^ 4 4 n, is reviewed. Both the …

The emphasis in this review is on the extent to which theoretical studies have accounted for
the empirical data on the three-nucleon systems. The ground, excited, and continuum states …

Final-state interactions are common ground between nuclear and particle physics. They are
fruitful because they enable us to infer properties of two (or more)-body systems, or very …

A study of the double charge-exchange reaction π−+ 3He π− π++ 3 n indicates resonant
behavior in the three-neutron system within a few MeV of threshold. The three-neutron data …

At present the only means for obtaining information about the neutron-neutron scattering
length a nn and effective range r 0 are studies of reactions with three or more particles in the …

The trineutron mass spectrum was observed in the stopped pion radiative capture reaction
3H (π−, γ) 3n by measuring the photon energy with a high-resolution spectrometer. The …

He 3 spectra from the bombardment of tritium and of He 3 targets with 22.25-MeV tritons are
presented. No clear evidence for new states in either residual nucleus is obtained; however …

In light of a new experiment which claims an identification of tetraneutron, we discuss the
results of experimental search of trineutron and tetraneutron in different nuclear reactions. A …

The present status of the problem of charge dependence is discussed. The information
about the neutron-neutron interaction derived from the two-neutron system, three-nucleon …

Nuclear investigations by double charge exchange of pions Page 1 RIVISTA DEL NUOVO
CIMENTO VOL. 1, N. 3 Luglio-Settembre 1971 Nuclear Investigations by Double Charge …