A narrow peak in the $K\pi$ effective-mass spectrum corresponding to the so-called kappa meson has been observed in the reaction ${\pi }^{+}+p\to {\Lambda }^0+K^{+,0\mathrm{}}+{\pi }^{+}+{\pi }^{0,+}$ at 3.2 GeV/c. We have shown that this peak cannot be explained by triangular or box singularity effects.

The intensity of nuclear magnetic resonance absorption of ${\mathrm{Rb}}^{87}$ nuclei in a thin slab of purified, cooled metal is observed to increase significantly in the range of magnetic-field strength and orientation where nearly sinusoidal size-effect variations in the surface resistance are found. Though no quantitative description of the effect is presently available, it clearly results from enhanced penetration of radio-frequency currents and fields into the bulk of the metal slab due to the cyclotron motion of the electrons. The phenomenon is expected to be generally observable in pure metals at low temperatures.

The flow of superfluid in an annulus is considered on the basis of free-energy arguments. Two critical velocities appear: One is equivalent to comparing the free energy of the fluid with the free energy of solid-body rotation; the other is equivalent to making the free energy of the fluid zero and corresponds to Feynman's criterion.

Effective-mass corrections due to emission and reabsorption of persistent spin fluctuations are shown to be large in Pd and to have a temperature dependence which fits qualitatively that of the low-temperature specific heat of ${\mathrm{He}}^3$.

Experimental measurements of the phonon dispersion relation for SnTe suggest that the phase transition of GeTe and SnTe/GeTe alloys is of a displacive character, similar to that of the perovskite ferroelectrics. They therefore provide the first examples both of diatomic ferroelectrics and of "ferroelectric semiconductors," with a narrow band gap.

The first-order Raman spectrum of mixed crystals of ${\mathrm{Ca}}_x{\mathrm{Sr}}_{1-x}{\mathrm{F}}_2$ and ${\mathrm{Sr}}_x{\mathrm{Ba}}_{1-x}{\mathrm{F}}_2$ has been measured. The Raman frequency varies linearly with concentration, while the Raman linewidth exhibits a maximum near the 50% mixture.

Photoneutron cross sections were measured for iron and bismuth for photon energies up to 15 keV above threshold by the neutron time-of-flight technique. A number of nuclear levels were observed. Nuclear properties which can be derived from the data include ground-state gamma-ray transition widths, gamma-ray strength functions, and average level spacings.

The sharp emission lines in the range 200 to 1700 Å originate from regions of the sun where quarks may be found mainly as bound to the nuclei of carbon, nitrogen, and oxygen. Electronic transitions of such species are predicted and a search is carried out in the far uv solar spectrum.

Momentum spectra of protons scattered inelastically in proton-proton collisions were obtained in an external beam at Nimrod using incident proton momenta of 2.85, 4.55, 6.06, and 7.88 GeV/c and various scattering angles in the range 22 to 144 mrad. There is evidence for the production of the 1410 MeV isobar at small angles. The well-known isobars of mass values 1236, 1518, and 1688 MeV are also seen. The differential cross sections are presented for the production of these isobars. They are analyzed in terms of the usual variables $s$ and $t$. Fits to the observed momentum spectra indicate for the $N^{*}\mathrm{}\left(1410\right)\mathrm{}$ a mass of 1410 ± 15 MeV and a width of 125 ± 20 MeV.

A plausible description of the behavior of a ${\mu }^{+}$ meson in aqueous solutions is given which suggests a reduction of almost 20 parts per million in the measured ${\mu }^{+}$ magnetic moment. When combined with muonium hyperfine measurements it supports a value of the fine structure constant which almost halves the disagreement between theory and experiment for the hyperfine structure in hydrogen.