The operation of the magnetic levitation electrometer suggested in ref. 1 is described. Measurements on the first five graphite grains (containing altogether ∼ 1016 nucleons) exclude the presence of quarks in them; a future program of search for terrestrial quarks by this instrument is outlined.
It is shown that the residue gi of the interaction poles are not the right measure for the effect of the forces. A simple example is constructed to clarify this point. The products giDi should be used instead, where Di are the values of the D function at the positions of the poles.
The T = 0, J = 1, 2 and 3 positive parity levels of a six nucleon system are calculated using single-particle orbitals derived from a deformed oscillator potential. Proper eigenfunctions of J2 are projected through Hill-Wheeler integrals. Simplified forces are used so that the entire deformation is due to the tensor force. It is found that, to a very good approximation, all three levels may be generated from a single intrinsic function with constant size and deformation parameters. The derived level scheme indicates that the vector effects of the tensor force, previously calculated by second-order perturbation theory, are included in this model.
The yield and energy spectrum of α particles and tritons emitted in the thermal neutron fission of 235U have been measured, and an upper limit is set for the emission of 6He nuclei.
Analysis of 2764 double scattering events of antiprotons at 1.18 GeV/c in the 81 cm Saclay hydrogen bubble chamber yields an asymmetry of (−2.3±3)% for the angular region 15° ⩽ θc.m. ⩽ 60°, with an average angle θc.m. = 28°. This would correspond to an upper limit of 20% for the polarization of the antiproton at 95% confidence limit.
The ratio between the total width and the sum of the partial widths as defined in the S-matrix theory has been computed for two resonance levels of 7Be from a simultaneous fitting of the reactions 6Li (p, p), 3He (α, α) and 6Li (p, α).
The M subshell rations of the 2.23 keV E3 transition in 99Tcm have been measured to test new calculations of conversion coefficients at threshold. The experimental and theoretical values agree.
The elastic scattering of 3.55 GeV/c π+ and π− mesons by protons was measured at centre-of-mass angles between 165° and 177°. The angular distributions for 864 events show a steeply rising backward peak for π+p, while the shape is less clear for π−p.
A study of π− + p →η + n near threshold shows that the cross section rises linearly with η momentum and that Λη < 0.9 MeVc2 (95% confidence limit).
The levels of the four nucleon system are calculated taking harmonic oscillator states with up to two quanta. The center of mass motion is explicitly eliminated and the effects of kinetic energy, Serber force and two particle spin orbit coupling are discussed.
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