We report a new measurement of the electron $g$-factor anomaly. Our result is $a=(1\mathrm{}159644\pm 7)\times {10}^{-9\mathrm{}}$, in agreement with theory.

We report experimental detection of a newly recognized, spectrally diffuse circular polarization in light from various incandescent bodies in a magnetic field. Polarization fractions of ${10}^{-5\mathrm{}}$ -${10}^{-4\mathrm{}}$ are seen at 1.5μm in a 25-kG field, roughly conforming with a very simple theory.

Using the strong spin dependence of large cross-section Penning reactions between $\mathrm{He}\left({}_{}{}^3{}_{}{}^{}S_1^{}{}_{}{}^{}\right)$ atoms and group-II metal atoms, it is shown that optical pumping can be extended to the excited states of ions. Magnetic resonance is observed for ${\mathrm{Cd}}^{+}$ $5{}_{}{}^2{}_{}{}^{}D_{\frac{5}{2}}^{}{}_{}{}^{}$ and ${\mathrm{Zn}}^{+}$ $4{}_{}{}^2{}_{}{}^{}D_{\frac{3}{2}}^{}{}_{}{}^{}$ and $4{}_{}{}^2{}_{}{}^{}D_{\frac{5}{2}}^{}{}_{}{}^{}$ excited ion levels. The measured lifetimes of these levels are 0.773 ± 0.027, 2.22 ± 0.11, and 1.61 ± 0.10 μsec, respectively.

Self-phase modulation originating from a direct distortion of the atomic electronic charge density has been observed in liquid argon and liquid and solid krypton.

Nuclear acoustic resonance signals have been observed in a single crystal of rhenium metal. From measurements of the resonance fields at different frequencies, values for the Knight shift and zero-field splitting at 4.2°K are obtained. The Knight shift, referred to aqueous NaRe${\mathrm{O}}_4$, is found to be (1.02 ± 0.06)%. The zero-field splitting, $\frac{3e^2\mathrm{qQ}}{20h}$, is found to be 40.6 ± 0.35 MHz for ${\mathrm{Re}}^{185}$ and 38.35 ± 0.2 MHz for ${\mathrm{Re}}^{187}$.

The experimental results obtained by optical-mixing spectroscopy on a critical binary mixture are compared with Kawasaki's theory.

The effect of gravity on measurements of the sound velocity and specific heat near the gas-liquid critical point is calculated in detail, using the "linear model" parametric equation of state. It is found that the linear model is consistent with the best available experimental data, both in gravity-free and gravity-dominated regions, with a choice of the exponent $\alpha$ equal to 0.06 ± 0.02.

The stability of ballooning modes is investigated in the neighborhood of the magnetic axis of an axisymmetric toroidal configuration of the Tokamak type. It is shown that the stability criterion for these modes is the same as that for localized modes.

The superconducting transition temperature of ${\mathrm{V}}_3$Au has been experimentally shown to vary by a factor of 300, depending on the degree of atomic ordering. This has previously been attributed to a change in the electronic density of states $n\left(E\right)\mathrm{}$ with ordering. A model is proposed here which provides a theoretical basis for this change in $n\left(E\right)\mathrm{}$ with ordering.

The intrinsic emission of CdS is studied at 20°K. We report the first clear-cut evidence of exciton polariton luminescence.

Anomalies were observed in the electronic component of the ultrasonic attenuation of transverse and longitudinal waves in high-purity rhenium, which could not satisfactorily be explained by the free-electron or real-metal theories of Pippard. A two-band model will be developed to explain the observed attenuation.

All ground-state bands observed in even-even nuclei, including closed-shell nuclei, are accurately predicted by a two-parameter description based on the cranking model. A hitherto unobserved discontinuity in a plot of $\frac{E\left(I\right)\mathrm{}}{E\left(2\right)\mathrm{}}$ vs $\frac{E\left(4\right)\mathrm{}}{E\left(2\right)\mathrm{}}$ is also predicted by the model.

The Frenkel-Kontorova model of a dislocation might be useful for the study of tachyons. The model has tachyonlike solutions which correspond to unstable states. This may explain why tachyons are unlikely to be observed.

Photoproduction of $\omega$ mesons from Be, C, Al, Cu, and Pb has been studied at a mean energy of 6.8 GeV. The $t$ distributions show a forward peak characteristic of a coherent diffraction mechanism, but also a considerable cross section at large $t$ characteristic of an incoherent production mechanism. The ratio of cross sections for coherently photoproduced ${\rho }^0$ mesons to $\omega$ mesons is 11.8 ± 1.3 compared with the simple SU(3) prediction of 9.

We have measured the $\overline{p}n$ differential elastic cross section in the four-momentum-transfer region of $-t=0.15\mathrm{}$ to 1.0 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^2$ using neutron scatters obtained in a $\overline{p}d$ bubble chamber experiment at 3.5 GeV/c. The $\overline{p}n$ elastic cross section is similar to the $\overline{p}p$ cross section at this energy to the extent that both cross sections exhibit a diffraction peak and a dip at $-t\simeq 0.45$ followed by a secondary peak. A comparison of $\overline{p}n$ and $\overline{p}p$ elastic scattering indicates a crossing of the two cross sections near the region of the dip. The results of this experiment suggest the presence of an $I=1\mathrm{}$, $t$-channel exchange in $\overline{N}N$ scattering.

The magnetic moment of the positive muon has been measured relative to that of the proton by determining its precession frequency in a magnetic field measured by proton NMR. With both protons and muons bound in a spherical sample of water, the result is $\frac{{\omega }_{{\mu }^{\prime }}}{{\omega }_{p^{\prime }}}=3.183\mathrm{}362\pm 0.000030$ (9.4 ppm). Including uncertainties due to the chemical environment of the muon, the result for free muons and protons is $\frac{{\omega }_{\mu }}{{\omega }_p}=3.183\mathrm{}330\pm 0.000044$ (14 ppm) which is consistent with recent measurements of the hyperfine splitting of muonium.

A significant isospin-1 enhancement in the cross sections for $\overline{p}p$ $\left(\overline{p}n\right)\to K^{*}\mathrm{}\left(890\right)\mathrm{}\overline{K}\pi \pi$ (${\overline{K}}^{*}K\pi \pi$) is observed at a mass of 2360 ± 25 MeV with a width $\Gamma <60\mathrm{}$ MeV. This mass and width are consistent with the $U$ meson and an enhancement reported in a recent Brookhaven National Laboratory backward ${\pi }^{-}p$ missing-mass experiment. Whereas we agree with the Brookhaven National Laboratory $\overline{N}N$ total cross section measurements on the ${{\pi }_1}^{*}\mathrm{}\left(2350\right)\mathrm{}$ position, our width is clearly inconsistent with their value of 140 MeV.

Evidence is presented for the production of $N^{*}\mathrm{}\left(1720\right)\mathrm{}$ ($M=1719\mathrm{}\pm 6$ MeV, $\Gamma =63\mathrm{}\pm 12$ MeV) and subsequent decay to $\Delta \mathrm{}\left(1236\right)\mathrm{}\pi$ in ${\pi }^{\pm }p$ interactions at 13.1 GeV. Analysis of the sequential decay $N^{*}\mathrm{}\left(1720\right)\mathrm{}\to {\Delta }^{++}{\pi }^{-}\to p{\pi }^{+}{\pi }^{-}$ limits the spin to values greater than $\frac{3}{2}$.

A calculation of the electric field gradient in the ${}_{}{}^2{}_{}{}^{}P$ ground state of atomic boron implies that the quadrupole moments of the stable boron isotopes, in barns, are $Q\left({\mathrm{B}}^{10}\right)=0.084\mathrm{}72\pm 0.00056$, $Q\left({\mathrm{B}}^{11}\right)=0.040\mathrm{}65\pm 0.00026$.

Curved theta-pinch experiments show that a toroidal drift of plasma is suppressed by a series of caulked cusp fields, produced with the aid of metal rings located inside the discharge tube. The introduction of rings is effective in the suppression of toroidal drift of the initial high-beta plasma, as well as in the stabilization of low-beta plasma in the later stage.