The polarization in nucleon-deuteron elastic scattering has been measured at a laboratory energy of 22.7 MeV. The angular range of detection was 19.5°-143.6° and 68°-154° in the center-of-mass system for the scattered protons and recoil deuterons, respectively.

We discuss the influence of dynamical nucleon-nucleon correlations on elastic electron scattering from light nuclei. The numerical results for ${\mathrm{He}}^4$ are presented.

Using the reaction ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}({\mathrm{Li}}^7,t){}_{}{}^{18}{}_{}{}^{}\mathrm{F}$ we have assigned hole-particle configurations to ten states of ${}_{}{}^{18}{}_{}{}^{}\mathrm{F}$. The results support a model which assumes weak coupling between holes and particles. It has also been found that the reaction obeys a $\Delta T=0\mathrm{}$ selection rule.

Most statements of Mach's principle demand that the mass of a solitary object be zero. The results of self-energy calculations in the canonical formalism of the scalar-tensor theory for solitary neutral point particles and the solitary charged point particle are reported here. The results show that from the viewpoint of Mach's principle, the scalar-tensor theory offers no substantial improvement over general relativity.

A periodic spatial modulation of the nonlinear susceptibility is shown theoretically and experimentally to lead to diffraction of optical harmonic radiation at angles of incidence for which Bragg's law is satisfied.

The differential cross section for backward ($cos{\theta }^{*}<~-0.84\mathrm{}$) $K^{+}p$ elastic scattering has been measured at 2.76 BeV/c. No evidence is seen for the $Z_1\mathrm{}\left(2505\right)\mathrm{}$or for a dip in $\frac{d\sigma }{\mathrm{du}}$ at 180°. A good fit with an exponential in $cos{\theta }^{*}$ is obtained, yielding a slope 13.0 ± 2.4 and an intercept $\frac{d\sigma }{\mathrm{du}}\left(180\mathrm{}°\right)=87\mathrm{}\pm 16$ μb/sr.

We report results obtained at the zero-gradient synchrotron for the polarization in ${\pi }^{+}p$ and ${\pi }^{-}p$ elastic scattering at 5.15 GeV/c, from $-t=0.2\mathrm{}\mathrm{to}2.0$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^2$. The results may be qualitatively understood on the basis of a simple Regge-pole model. In addition to the flip amplitude due to $\rho$ exchange, a significant $I=0\mathrm{}$ flip amplitude is required.

The reaction $K^{-}n\to \Lambda {\pi }^{-}{\pi }^0$ for c.m. energies from 1600 to 1740 MeV is found to proceed entirely through the two-body $Y_1^{}{}_{}{}^{*}\mathrm{}\left(1385\right)\mathrm{}\pi$ state. A partial-wave analysis of the $Y_1^{}{}_{}{}^{*}\mathrm{}\left(1385\right)\mathrm{}\pi$ state implies $s$-channel production of $Y_1^{}{}_{}{}^{*}\mathrm{}\left(1660\right)\mathrm{}$, $Y_1^{}{}_{}{}^{*}\mathrm{}\left(1765\right)\mathrm{}$, and a $Y_1^{}{}_{}{}^{*}\mathrm{}\left(1700\right)\mathrm{}$ with the subsequent decay of each into $Y_1^{}{}_{}{}^{*}\mathrm{}\left(1385\right)\mathrm{}\pi$. A determination of the mass, width, elasticity parameter, spin, and parity of each of these $s$-channel resonant states has been made.

The elastic and quasielastic scattering of incident protons by a deuterium target, over the angular range 20-70 mrad in the laboratory system, has been determined using a sonic spark-chamber system. Data were obtained at incident momenta of 1.29, 1.39, and 1.54 GeV/c and analyzed to determine the ratio of the real to imaginary parts of the $\mathrm{pn}$ forward scattering amplitude. Satisfactory agreement with the predictions of dispersion-relation calculations was obtained.

Deep-mine neutrino experiments set an upper limit of ${10}^{-33\mathrm{}}$ ${\mathrm{cm}}^2$ for the reaction cross section of ${\nu }_{\mu }$-nucleon interaction at ${10}^3$ GeV; the implications of this on the $W$-pair strong-interaction model are discussed.

Results are presented to show that resonance production occurs in a significant fraction (>50%) of the multipion final states with four or more outgoing pions. The data also indicate that the $\Delta \mathrm{}\left(1236\right)\mathrm{}$ nucleon isobar is normally associated with $\rho$ and $\omega$ mesons in production. A large proportion of the $\rho$ and $\omega$ mesons observed in the multipion final states are the decay products of higher mass enhancements ($A_1,A_2,B$).

We have studied the absorption spectrum of argon in the 50-Å region. The discrete structure observed near the $L_{\mathrm{II},\mathrm{III}}$ edge is attributed to the excitations of a $2p$ electron to the high-lying Rydberg states which converge to the ${}_{}{}^2{}_{}{}^{}P_{\frac{3}{2}}^{}{}_{}{}^{}\left(L_{\mathrm{III}}\right)$ and ${}_{}{}^2{}_{}{}^{}P_{\frac{1}{2}}^{}{}_{}{}^{}\left(L_{\mathrm{II}}\right)$ states of the argon ion. The energy values of the $L_{\mathrm{II}}$ and $L_{\mathrm{III}}$ levels of the argon atom are found to be 250.55 ± 0.05 and 248.52 ± 0.05 eV, respectively.

Refractive index measurements on fluid-xenon isochores in the density range 1-12 millimoles ${\mathrm{cm}}^{-3\mathrm{}}$ indicate that the temperature and density dependence of the Lorentz-Lorenz function (LL) is small. The mean value of LL for the coexistence curve is 10.527 ± 0.07 ${\mathrm{cm}}^3$ ${\mathrm{mole}}^{-1\mathrm{}}$ at 5893 Å.

We present data for the velocity and dispersion of second sound in the critical region of He II. To good accuracy, the critical-region expressions relating $u_2$, ${\rho }_s$, and $C_p$ are shown to be self-consistent. The anomalous dispersion is consistent with recent estimates of the coherence length.

Although the hydrodynamic Hamiltonian is widely used to predict properties of liquid ${\mathrm{He}}^4$, it has been felt to be inherently unsatisfactory because it was believed that the phonon spectrum at 0°K predicted by this Hamiltonian is $\epsilon =cp$, contrary to experiment. However, a self-energy calculation shows that the predicted spectrum is in fact dispersive, of the form $\epsilon =cp(1-\gamma p^2)$. Lowest order pertrubation theory gives the proper order of magnitude for $\gamma$.

A theory is presented to explain the dependence of the superconducting transition temperature $T_c$ on the changes in the phonon frequency spectrum and electronic density of states which result from lattice disorder. Numerical calculations of $T_c$ are presented for films composed of crystalline granules, for films composed of amorphous granules, and for homogeneous amorphous metals. The calculations are in good agreement with experimental values of $T_c$.

We have observed large increases in the transition temperature $T_c$ of thin, quenched composite films consisting of alternating layers of dissimilar metals. We estimate the regions of the film which experience the greatest increase to be within a few monolayers of the metal-vacuum or metal-metal surfaces. A possible explanation for the increased $T_c\text{'}\mathrm{s}$ is the shift in the electron-phonon coupling to larger values due to the lowering of the phonon frequencies.

Some recent theories on the electrical properties of liquid mercury-based alloys are discussed. A simple energy-dependent pseudopotential derived from the properties of pure mercury is applied to the mercury-indium system. Close agreement with experiment is obtained.

The hitherto unexplained extra specific heat and fast spin-lattice relaxation in cerium ethyl sulfate are explained by an anomalous phonon spectrum calculated using thermodynamic Green's functions for incoherent spins and phonons.

When SrTi${\mathrm{O}}_3$ or Ti${\mathrm{O}}_2$ doped with certain transition elements is irradiated with light in the region 0.39 to 0.43 μ, broad visible absorption bands with peak absorption as high as 100 ${\mathrm{cm}}^{-1\mathrm{}}$ are introduced. The study of optical and EPR spectra of Fe/Mo doped crystals under the influence of light and various heat treatments shows that the effect is due to a transfer of charge between Fe and Mo ions such that the nonabsorbing ${\mathrm{Fe}}^{3+}$ and ${\mathrm{Mo}}^{6+}$ ions become ${\mathrm{Fe}}^{4+}$ and ${\mathrm{Mo}}^{5+}$ with absorption bands in the visible.