A dip in elemental reaction cross sections for protons, deuterons, and alpha particles has been observed previously in the vicinity of nickel. The present measurements on separated isotopes in the nickel region for 14.5 MeV protons reveal that the dip is associated with the relatively low average value of N for nickel.
Using 55 cm hydrogen bubble chamber exposed in the π− - meson beam at 3.25 ±0.02 GeV/c 160 000 photographs were obtained and 2104 events of the reactions of the type π-p → pπ+π-π- and 1766 events of the reactions of the type π-p → pπ+π-π-πo were selected and analysed. In the spectrum of the effective masses of π+π-π- system from the first reaction A2-mesons were selected and the analysis was made by means of different methods to determine the spin-parity of this resonance. The second reaction was used to study πη decay mode of the A2-meson.
The analogues of the two lowest levels of 38Cl, with Jπ=3- and 5-, were excited in the T-forbidden reaction 37Cl(p, αo)34S. The Jπ=3- analogue state is split into several components which form a micro-giant resonance.
The neutron strength function of cobalt has been measured for neutron energies between 0 and 500 keV. Intermediate structure in the form of oscillators with widths of about 40 keV is observed.
A phenomenological relation between ground-state atomic masses in conjuction with charge symmetry is used to investigate all the masses of nuclei with A ⩽ 42 with Z > N. In cases where experimental data exist the agreement with the predictions is good.
The surface tension σ and the surface density thickness t of nuclear matter have been calculated in the Fermi-gas model, the nucleons moving in a self-made shell model potential with a realistic slope and velocity dependence (parameters a and β). One gets the experimental values for σ and t with a and β agreeing with earlier data.
The time dependence of interactions coming from a pure beam at t = 0 is analyzed for the KS−KL mass difference, Δm. The result is in good agreement with recent lessaccurate measurements using the same technique, as well as more accurate measurements using different techniques.
The Mössbauer effect of the 64 keV γ ray in 157Gd has been observed, using Gd2O3 as source as well as absorber material at 4.2°K. The hyperfine structure splitting is large compared to the experimental line width.
Magnetic moments of HoP, HoAs and HoSb are measured at 1.7°K as a function of the orientation of the crystals. Strong uniaxial anisotropy is encountered in all these compounds.
The potential of interaction between charged particles and lattice atoms is shown to be recoverable from the single-phonon scattering cross section, which recent advances in the measurement of small energy losses have made experimentally accessible.
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