It is pointed out that the Brans-Dicke theory predicts a transverse spin-0 component of the $O\left(r^{-1\mathrm{}}\right)$ radiative Riemann tensor. Unlike the conventional spin-2 radiative Riemann tensor, monopole oscillations may serve as a source. Under favorable conditions, neutron star formation within our galaxy will be detectable by Weber's gravitational-wave receiver.

The production angular distribution of the reaction $K^{-}p\to {Y_1}^{*+}\mathrm{}\left(1660\right)\mathrm{}{\pi }^{-}$ around 2.6 GeV/c, measured by using the ${\left(\Sigma \pi \right)}^{+}$ and ${\left(\Sigma \pi \pi \right)}^{+}$ decay modes, is interpreted as evidence for two distinct ${Y_1}^{*}\mathrm{}\left(1660\right)\mathrm{}$ resonances.

Recent data on ${\pi }^{\pm }$ photoproduction at 3.4 GeV are used to investigate the nature of the amplitudes contributing to these processes. It is found that a large amplitude corresponding to natural-parity $G=+1\mathrm{}$ exchange is necessary to explain the data, even in the region $t\approx -0.6\mathrm{}$ ${\mathrm{GeV}}^2$ where Reggeized $\rho$ exchange must vanish. This implies a large contribution from some ${\rho }^{\prime }$ trajectory or from cuts, absorption, etc. The large $G=+1\mathrm{}$ exchange amplitude needed to explain the $\frac{{\pi }^{-}}{{\pi }^{+}}$ ratio is only marginally consistent with the vector-dominance model.

We outline a dynamical scheme for studying Regge behavior of scattering amplitudes. It is based on unitarity and the concept of short-range momentum-space correlations in high-energy processes.

If SU(3) symmetry is assumed and singlet-octet mixing is neglected, (a) the $\eta \pi$ decay mode is forbidden for all negative $\mathrm{CP}$ states, (b) $\eta \pi$ cannot appear in decays where the $K\overline{K}$ mode is absent, (c) the $\frac{\eta \pi }{K\overline{K}}$ branching ratio is the same for all isovector octet bosons allowed to decay into $\rho \pi$. Violation of these predictions would suggest serious re-examination of other SU(3) decay predictions. Prediction (b) seems to be violated by preliminary data. If there are no violations, and $\eta \pi$ and $\rho \pi$ are both allowed, the only possible classification for either $A_2$ peak with $J<\mathrm{}4\mathrm{}$ is $2^{++}$.

Experimental data are still consistent with Uretsky's model, which is $\mathrm{CP}$ invariant at the price of one extra neutral kaon which has no strong interactions but is degenerate with $K^0$ and ${\overline{K}}^0$ and mixes with them in weak decays. Long formal discussions of whether or not $\mathrm{CP}$ nonconservation is proved by present data are completely irrelevant as long as this model fits the data. $\mathrm{CP}$ nonconservation is presently accepted as the most reasonable interpretation of present data, not as an inevitable consequence.

It is assumed that the contributions of baryon Regge trajectories cancel in the imaginary parts of meson-baryon scattering amplitudes in states of the SU(3) representations 10* and 27. Predictions concerning interaction ratios, mass splitting, and particle mixing are made and compared with experiment.

The differential collision cross section of neon has been measured and the data used to obtain the intermolecular potential. Calculations of the macroscopic properties made using this potential are in reasonable accord with experiment.

The results of detailed experimental study of the temperature dependence of the electrical conductivity of a two-dimensional superconductor in the transition region are discussed in terms of a model which treats the critical region as well as the classical regions above and below the superconducting transition temperature $T_C$. The data taken below $T_C$ suggest a means of distinguishing the contribution to the broadening of the resistive transition due to sample inhomogeneity from that due to intrinsic fluctuations.

The $g$ shift of conduction electrons in lithium, determined recently by VanderVen, is about 30 times larger than a theoretically computed value. The general theory upon which the calculation was based is corrected. A revised theoretical estimate of $\delta g$ agrees with experiment.

The Raman spectra of optical phonons in InAs, InSb, InP, and GaAs have been studied via reflection techniques, using 5145-, 4965-, 4880-, 4765-, and 4658-Å argon laser excitation. The scattering cross sections in InAs display strong enhancement for laser photon energies near the $E_1$ saddlepoint gap, and two-phonon processes are observed under these conditions. In InSb the laser frequencies are near the $E_1+{\Delta }_1$ gap, but no strong enhancement is observed. InP and GaAs were studied far from resonance with any known gap and demonstrate that such gap resonance is not essential for reflection studies of direct-gap semiconductors using visible-spectrum lasers.

Reflectivity measurements on dilute gold-iron alloys by a new method are reported. There is clear evidence that the band gaps change steadily on alloying. In the region 3 to 6 eV additional absorption growing nonlinearly with concentration suggests that the impurities are interacting with each other.

Interpretation of the temperature dependence of exchange-scattered low-energy electrons leads to the prediction of a low-lying surface-spin-wave band in antiferromagnetic NiO.

We have observed the effect of nuclear deformation on the fast-neutron total cross sections of 15 deformed nuclei within the region $152<~A<~189$, and five deformed nuclei within the region $228<~A<~240$. The phenomenological nonlocal optical model of Perey and Buck disagrees in these regions with our experimental data.

The reactions ${}_{}{}^{207}{}_{}{}^{}\mathrm{Pb}(t, p){}_{}{}^{209}{}_{}{}^{}\mathrm{Pb}$ and ${}_{}{}^{210}{}_{}{}^{}\mathrm{Pb}(p, d){}_{}{}^{209}{}_{}{}^{}\mathrm{Pb}$ have been used to study the two-particle, one-hole states of ${}_{}{}^{209}{}_{}{}^{}\mathrm{Pb}$. The complementary nature of these two reactions permits identification of all but three of the observed levels below 3561 keV.

Various anomalous high-energy pure photon showers seen in cosmic-ray emulsions are interpreted in terms of properties expected for the production of bound pole-antipole pairs. It is argued that such bound pairs are the most likely state for created monopoles.

The cross section for $\gamma p\to {\pi }^{-}{\Delta }^{++}\mathrm{}\left(1236\right)\mathrm{}$, measured at 5, 8, 11, and 16 GeV from nearzero momentum transfer to -1 ${\mathrm{GeV}}^2$ (-2 ${\mathrm{GeV}}^2$ at 16 GeV), rises from small $t$ to a maximum near $-t={m_{\pi }}^2$, then falls as $e^{12t}$ out to $-t\approx 0.2$ ${\mathrm{GeV}}^2$, after which it becomes roughly equal in slope and magnitude to the single ${\pi }^{+}$ photoproduction cross section ($e^{3t}$). At fixed $t$, the cross section varies as $k^{-2\mathrm{}}$, where $k$ is the laboratory photon energy. The results do not agree well with the simple vector-dominance model.

Predictions of the quark model of high-energy scattering are tested by using the reaction $K^{-}p\to {\overline{K}}^{*}\Delta$. All predictions are satisfied when interpreted as applying in the $t$-channel coordinate system.

The asymptotic behavior of electroproduction cross sections is shown to contain information about the constitution of the electric current.

Mixing in a convective core on a time scale that is short compared with the lifetime of ${\mathrm{Be}}^7$ against electron capture would reduce the flux of neutrinos resulting from ${\mathrm{B}}^8$ decay near the solar center.