The flux of relativistic particles with a charge $>~\frac{4}{3}e$ was measured in cosmic rays at sea level using a scintillation counter hodoscope. An upper limit equal to 1.3×${10}^{-10\mathrm{}}$ ${\mathrm{cm}}^{-2\mathrm{}}$ ${\mathrm{sr}}^{-1\mathrm{}}$ ${\sec }^{-1\mathrm{}}$ was established at 90% confidence level.

The ratio of $\Lambda$ to ${\Sigma }^0$ photoproduction cross sections has been measured to be 1.25±0.15. The measurement was carried out at center-of-mass angles of about 30°; the observed ratio disagrees with predictions of a quark model. In the study of $K^{+}$ photoproduction for photon energies from 4.0 to 6.1 BeV, we obtained evidence for $Y^{*}$ states at 2360 and 2530 MeV.

Assuming that the Regge asymptotic behavior prevails and using a generalized super-convergence relation, we compute the first-order electromagnetic nucleon mass difference. We find $M_p-M_n\approx -1.4\mathrm{}$ MeV compared with the experimental value -1.3 MeV.

By saturating finite-energy sum rules even at high energies by narrow resonant states, the couplings and the corresponding decay rates of these high resonant states to lower mass particles can be determined in a bootstraplike manner.

The comparison of quadrupole doublets of Mössbauer spectra for monocrystals of siderite at various orientation angles and those for polycrystalline siderite gives quantitative proof of the vibrational anisotropy origin of integral asymmetry of doublets in polycrystals. Such comparison has also been used for determination of the absolute probability of the Mössbauer effect and of the sign of the electric field gradient on iron nuclei in siderite (which was found to be positive).

In an isotropic distribution of particles undergoing magnetic bremsstrahlung, the particles moving at the largest angles to $\overrightarrow{\mathrm{B}}$ lose energy the fastest. The resulting pressure anisotropy can lead to plasma instability. The particle velocities tend secularly to align with $\overrightarrow{\mathrm{B}}$, slightly enhancing the effect.

High-temperature expansions of the susceptibility and internal energy (specific heat) are presented for general lattice structure for a system of isotropically interacting unit vectors (or "classical spins") which are constrained to lie in a plane. A phase transition ($T_c>0\mathrm{}$) is indicated for two-dimensional lattices; the expected result $T_c=0\mathrm{}$ is found in one dimension, but only upon choosing a more suitable expansion parameter than $\frac{J}{\mathrm{kT}}$. Similarities with the corresponding expansions of the $S=\frac{1}{2}$ Ising and classical Heisenberg models are pointed out; in particular, it is found that certain critical properties of this planar model appear to be bounded on one side by the Ising model and on the other side by the Heisenberg model.

Silicon burning at temperatures in the neighborhood of 4 × ${10}^9$ °K has been studied with the aid of a quasiequilibrium model which describes the abundance of the nuclei in the interval $28<~A<~62$. It is found that, for a broad range of temperatures and densities, silicon burning leads to nuclear abundance distributions which match important features of the natural solar-system abundance distributions and that a large nuclear energy release accompanies silicon burning.