No far-infrared absorption has been observed below the gap for the superconducting state but an irregular frequency dependence of the surface impedance has been found for the normal state.

The Widom-Kadanoff scaling laws are generalized to dynamic phenomena, by making assumptions on the structure of time-dependent correlation functions near $T_c$. The theory is applied to isotropic Heisenberg antiferromagnet and predictions are made, which can be tested by inelastic neutron-scattering and nmr measurements. The ferromagnet is also briefly discussed.

The $p-p$ polarization asymmetry has been measured at 9.6-, 15.6-, and 19.7-MeV laboratory energy with accuracy down to ±0.003. The interpretation of our results requires a significant spin-orbit term in the interaction.

The total $S^{1-}$ matrix of ${\mathrm{Ca}}^{40}$ has been calculated for excitation energies between 11 and 28 MeV. As typical results, the ($\gamma$, $p_0$) and the total absorption cross sections are shown and compared with experiments. It is shown that the proper treatment of the one-particle, one-hole shell-model continuum accounts for most of the observed structures.

The reaction ${\mathrm{Pb}}^{208}(\alpha , t){\mathrm{Bi}}^{209}$ has been studied to investigate the single-proton states following $Z=82\mathrm{}$. The excitation energies and shell-model assignments for the observed states in ${\mathrm{Bi}}^{209}$ are as follows: ground state, $1h_{\frac{9}{2}}$; 0.90-MeV, $2f_{\frac{7}{2}}$; 1.61-MeV, $1i_{\frac{13}{2}}$; 2.84-MeV, $2f_{\frac{5}{2}}$; and 3.14-MeV, $3p_{\frac{3}{2}}$.

Using a generalized Goldhaber-Teller model of the giant multipole resonance in ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$, we have evaluated radiative pion-capture rates from $1s$ and $2p$ orbits, leading to various multipole isospin states in ${}_{}{}^{16}{}_{}{}^{}N$, and obtained the corresponding $\gamma$ spectra. The subsequent neutron emission was considered on the basis of Wigner's $R$-matrix theory. Whereas in $1s$ capture, the spectra are dominated by the dipole resonances, in the $2p$ capture there is an even stronger contribution from the $2^{+}$ and $3^{+}$ quadrupole states. The total radiative capture rate compares favorably with experiment.

We show that a study of the decay process $K^{+}\to {\mu }^{+}\nu e^{+}{e}^{-}$ could be a practical experiment to test the $t$-reversal property of radiative weak decay of hadrons.

Sets of $t=0\mathrm{}$ current-algebra and superconvergence sum rules are treated as equations in the coupling constants and masses of states which are assumed to dominate the sum rules. The solutions of these sets lead to new mass relations among particles of different spins and parities. The algebraic structure of the sum rules and their solutions is discussed.

We derive a low-energy theorem for pion Compton scattering giving terms of second order in photon frequency. This is then used to derive the value of the low-energy parameters. The low-energy theorem is also converted into a sum rule and a resonance saturation is attempted.

The hypersonic wave generated by the stimulated Brillouin scattering of intense laser light in fused quartz has been detected and measured, and an estimate of the attenuation constant of the 24-GHz sound wave in fused quartz at room temperature is obtained on the basis of the measured characteristics of the Stokes light generated in the stimulated scattering process.

Hot electrons have been injected into liquid helium, cyclohexane, and benzene from a metal-oxide-metal cathode. The effective barrier for electron injection into helium from these metalliclike electrodes was found to be between 2 and 3 eV, an extra large value probably arising from the additional energy requirements on the free electron in overcoming energy-loss processes and the image potential. The range of these low-energy free electrons is estimated to be ∼70 Å.

The binding energy of an electron was ∼0.9 eV in cyclohexane and ∼1.4 eV in benzene, their difference being attributed to the electron affinity of the benzene molecule.

The critical properties of a lattice of planar classical "spins," which can be considered as a model for the $\lambda$ transition in a Bose fluid, are studied using high-temperature series expansions. It is conjectured that in three dimensions the critical exponents ($T>\mathrm{}{T}_c$) for the specific heat and susceptibility of the model are $\alpha =0\mathrm{}$ (corresponding to a logarithmic singularity) and $\gamma =1\mathrm{}\frac{5}{16}$, respectively.

Surface effects depress the Morin transition in microcrystals of $\alpha$-${\mathrm{Fe}}_2$${\mathrm{O}}_3$ by increasing the lattice spacing homogeneously throughout the whole microcrystal volume.

The relative magnetic inelastic neutron scattering from spin waves and the continuum spin-flip band in a ferromagnetic metal is shown to depend upon the wave vector $\overrightarrow{\mathrm{q}}$. In particular, the scattering from the continuum band vanishes as $q\to 0$, and the scattering from the spin waves vanishes as $q\to q_{max}$, the cutoff vector for spin waves.

The dipole-dipole hyperfine interactions between the $V_K$ center and nearby lattice nuclei have been calculated. Comparison with the experimentally measured hyperfine constants shows the lattice distortion in the vicinity of the $V_K$ center.