Seven cyclotron resonance lines have been resolved providing quantitative data suitable for theoretical analysis of quantum effects of intraband transitions in the degenerate valence bands of indium antimonide. The heavy hole has been resolved for the first time and its mass shows anisotropy. Identification of several transitions with low quantum numbers have been made from observations of their intensities as a function of temperature.

Specific-heat data on the well-studied copper-iron Kondo alloy have been taken at temperatures down to $2\times {10}^{-3\mathrm{}}{T}_{\mathrm{K}}$, where the Kondo temperature $T_{\mathrm{K}}\approx 20$K. Results suggest a choice among current theoretical models of the quasibound state, and indicate the apparent existence of a significant amount of entropy at still lower temperatures.

The structure of the conduction-band system of crystalline anthracene has been investigated by means of electron photoemission from negative anthracene ions formed by reaction with K and Na. A sharp emission threshold is found at 0.79 ± 0.01 eV. The lowest conduction band is less than 0.03 eV wide in agreement with the calculated value. A second conduction band, 0.3 eV wide, is also found, separated from the lower one by less than 0.05 eV.

The resistive electric field and the Hall field were measured in pure Nb in the mixed state as a function of magnetic field at high current densities and at several temperatures. An analysis of vortex motion in the presence of a pinning force gives that in the limit of high current density the differential resistivities become independent of pinning force. We find that the flux-flow resistivity is proportional to $\frac{B}{H_{c2\mathrm{}}}$ and the Hall resistivity equals $\mathrm{RB}$. It follows that the Hall tangent in the mixed state is constant and equal to its value at $H_{c2\mathrm{}}$.

Pt, Ni, and Al impurities are introduced into Sn-Sn junctions by an ac-discharge method. In addition to a zero-bias resistance anomaly, the junctions exhibit an anomalous voltage shift in their $I-V$ characteristics between the normal and superconducting state.

Experimental and theoretical results are presented which show that a pair of closely spaced resonant loss peaks at microwave frequencies in TmFe${\mathrm{O}}_3$ can be transformed into a single nonresonant loss peak by rotation of the applied field through as little as 3 deg. These findings provide the basis for understanding some previously puzzling microwave absorption measurements in the rare-earth orthoferrites.

Accurate measurements of the molar volume of argon in the fluid and solid phases along the melting curve have been made with a weighing technique and data obtained for melting temperatures and pressures up to 200°K and 6.3 kbar. A simple model for melting, which agrees reasonably well with these experimental data, indicates the correspondence between the details of the intermolecular pair potential and the quanlitative features evident in the transition.

The magnetization of single-crystal cerous magnesium nitrate is found to deviate from the prediction of the commonly accepted ionic crystal-field model at large values of $\frac{H}{T}$. Although affecting the magnetic temperature scale for cerous magnesium nitrate at low temperatures in high magnetic fields, the present results are in agreement with the model for $\frac{H}{T}<7\mathrm{}$ kG/°K in the range $1.2°\mathrm{K}<~T<~4.2°\mathrm{K}$, thus substantiating one of the basic assumptions of the existing magnetic temperature scale for $T>~6$ mdeg K.

Electric dipole $\gamma$ rays from the $2f_{\frac{7}{2}}$ isobaric analog state ${\left(2\mathrm{}{T}_0\right)}^{-\frac{1}{2}}{T}_{-}|i〉$ to the $2d_{\frac{5}{2}}$ ground state $|f〉$ in ${}_{}{}^{141}{}_{}{}^{}\mathrm{Pr}$ were measured with a Ge(Li) crystal. The matrix element of the $E1\mathrm{}$ $\gamma$ transition, $\left|〈f\right|m_{\gamma }{T}_{-}{\left(2\mathrm{}{T}_0\right)}^{-\frac{1}{2}}\left|i〉\right|$, and that of the analogous first forbidden $\beta$ transition, $\left|〈f\right|m_{\beta }\left|i〉\right|$, were obtained.

The magnetic moments of nuclear isospin doublets are examined under the assumption that $\overrightarrow{\mu }={\overrightarrow{\mu }}_0\left(\mathrm{isoscalar}\right)+{\overrightarrow{\mu }}_3\left(\mathrm{isovector}\right)$. For fixed $J$ and $P$, the magnetic moments of nuclei with odd numbers of neutrons or protons all lie on two straight lines. The slope of the lines is approximately the same for any $J$ and $P$.

The fragmentation of the ${\mathrm{Sc}}^{49}$ analog levels is calculated and is shown to result from two-particle, one-hole $T_{<}$ states that include higher energy bound proton contributions. In addition, the damping widths of the fragmented levels due to three-particle, two-hole couplings $T^{\downarrow }$ and the escape widths $T^{\uparrow }$ are computed. The theoretical analog-level energies and widths are compared with experiment.

A counter example is constructed to an alleged theorem that direct-channel resonances lying on rising Regge trajectories cannot asymptotically simulate a crossed-channel Regge amplitude in the direct-channel physical region. The crucial point is that the residue of a Regge pole falls strongly with energy.

We report on cross-sectional measurements on the photoproduction of ${\pi }^0$ and ${\eta }^0$ mesons on hydrogen for a range in $t$ of -0.2 to -0.9 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^2$ and for a range of energies 6.0-16.0 GeV. The sharp dip observed at lower energies at $t=-0.5\mathrm{}$ for ${\pi }^0$ production becomes less pronounced at higher energies. This implies in the Regge framework the $B^0$ meson trajectory dominates at higher energies. Our one angular distribution for ${\eta }^0$ production at 6.0 GeV shows no dip at $t=-0.5\mathrm{}$ as do the ${\pi }^0$ data.

Differential cross sections for elastic scattering of 6-GeV/c ${\pi }^{-}$, $K^{-}$, and $\overline{p}$ from protons have been measured in the angular range 25°-105° (c.m. system) and for 8-GeV/c ${\pi }^{-}$ in the angular range 75°-115° (c.m. system). Structure in the angular distributions has been observed.

The angular distribution for elastic ${\pi }^{+}-p$ scattering has been measured over the angular range $135°<{\theta }_{\mathrm{c}.\mathrm{m}.\mathrm{}}<180\mathrm{}°$ for pion laboratory momenta of 5.9, 9.9, and 13.7 GeV/c and also for ${\pi }^{-}p$ at 5.9 and 9.9 GeV/c. More limited angular distributions are presented for ${\pi }^{-}-p$ at 13.7 and 16.3 GeV/c and ${\pi }^{+}-p$ at 17.1 GeV/c. In both the ${\pi }^{-}-p$ and ${\pi }^{+}-p$ scattering the cross section rises by over 2 orders of magnitude in the backward direction; for ${\pi }^{+}-p$ only, there is a sharp dip at $u=-0.15\mathrm{}$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^2$.

The $N_{\alpha }$ and ${\Delta }_{\delta }$ Regge-trajectory functions in the scattering region are obtained from analysis of new data on backward ${\pi }^{\pm }p$ elastic scattering. At small $\mathrm{}\left|u\right|\mathrm{}$, the intercepts and slopes of both trajectories agree with straight-line extrapolations $\alpha =a+bu$ through the baryon masses. In the large $\mathrm{}\left|u\right|\mathrm{}$ region, the trajectories appear to be leveling off.

Estimates are made of the expected gravitational radiation from the pulsars, assuming that they are either oscillating dwarf or neutron stars, or fast rotating binaries. It is concluded that a radiative Riemann tensor of magnitude ${10}^{-42\mathrm{}}$ ${\mathrm{cm}}^{-2\mathrm{}}$ may be expected on earth as a consequence of some of these assumptions. A large detector of the type already developed is likely to succeed in detecting a radiative Riemann tensor exceeding ${10}^{-42\mathrm{}}$ ${\mathrm{cm}}^{-2\mathrm{}}$ at pulsar frequencies.

Taking into account the anomalous magnetic moment of the electron by adding the socalled Pauli anomalous interaction term to the usual Dirac Hamiltonian for an electron in a constant magnetic field $H$, we conclude that spontaneous pair creation may occur for values of $H$ of the order of $\frac{m^2{c}^4}{e^3}$, a "critical field" beyond which classical electro-dynamics breaks down.

We report an asymmetry of 2.4 ± 1.4% based on 6710 events of $\eta \to {\pi }^{+}{\pi }^{-}\gamma$.

We report an asymmetry of 1.5 ± 0.5% based on 36 800 events of $\eta \to {\pi }^{+}{\pi }^{-}{\pi }^0$.