We propose an electron-interference experiment involving laser light. It is estimated (roughly) that presently available (cw) laser sources can yield detectable "fringe" displacement in the electron interference pattern.

We have derived several sum rules based upon the assumption that the SU(3) group will be exact at infinite energy. In this way, decays of vector mesons into lepton pairs have been computed together with the decay rate for $\varphi \to K\overline{K}$.

The Kohn variational principle is extended to apply to scattering processes where a two-particle bound state is broken up by a third particle.

Careful examination of individual absorption peaks in the low-temperature magnetoabsorption spectra of InSb and germanium reveal fine structure attributable to excitons. This confirms theoretical predictions concerning excitons in a high magnetic field and provides a means of experimentally determining the role of excitons in the analysis of the magnetoabsorption spectra for band parameters and for polaron effects.

The Raman spectrum of crystalline quartz has been studied at temperatures between -196 and 615°C. A weak mode of symmetry $A_1$ with room-temperature Raman shift of 147 ${\mathrm{cm}}^{-1\mathrm{}}$ is found to grow in intensity and move towards zero Raman shift as the alpha-beta transition is approached. This mode, rather than the 207-${\mathrm{cm}}^{-1\mathrm{}}$ mode, appears to play the fundamental role in the phase transition. The temperature dependence of the Raman shift of the new mode is given by ${\nu }^2\sim {|T-T_c|}^{\gamma }$ with $0.4<~\gamma <~0.5$.

It is shown that the $D$ component of the deuteron internal wave function gives rise to corrections to the direct reaction theory of ($d, p$) and ($p, d$) reactions which depend strongly on the angular momentum of the transferred neutrons. For an orbital angular momentum transfer of 3 the corrections are large and give an important contribution to the $J$ dependence observed in the reactions ${\mathrm{Fe}}^{56}(p, d){\mathrm{Fe}}^{55}$ and ${\mathrm{Ni}}^{57}(p, d){\mathrm{Ni}}^{56}$.

The lowest $T=2\mathrm{}$ level in the self-conjugate nucleus ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$ has been observed as a sharp resonance in the once—$T$-forbidden capture reaction ${}_{}{}^{23}{}_{}{}^{}\mathrm{Na}(p, \gamma ){{}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}_{T=1\mathrm{}}^{}{}_{}{}^{}}^{*}$ and in the twice-$T$-forbidden elastic scattering ${}_{}{}^{23}{}_{}{}^{}\mathrm{Na}(p, p_0){}_{}{}^{23}{}_{}{}^{}\mathrm{Na}$. The assignment of $J=0\mathrm{}$ to this level at $E_x=15.436\mathrm{}\pm 0.005$ is confirmed by $\gamma -\gamma$ correlation measurements.

Anomalous magnetic fields have been found to exist at the sites of nuclei embedded, by recoil from Coulomb excitation, into iron and nickel foils, of such a nature that for considerable time intervals the large magnetic fields at the stopped nuclei are not parallel to the external magnetic fields. The reliability of this method of measuring nuclear $g$ factors is therefore in considerable doubt. A model of the magnetic-field distribution is presented, but the mechanism which produces this distribution is not understood in detail.

A neutron-beam magnetic resonance experiment with very slow neutrons (as low as 60 m/sec) has been used to set a limit to the neutron electric dipole moment that is more than 100 times lower than the previous limit set by Smith, Purcell, and Ramsey. The value found for the neutron electric dipole moment divided by the proton charge is $\frac{{\mu }_e}{e}=(-2\mathrm{}\pm 3)\times {10}^{-22\mathrm{}}$ cm. This value is lower than the predictions of many of the time-reversal-noninvariant theories which account for the ${K_2}^0$ decay.