Polar-Faraday-rotation and magnetization measurements on evaporated amorphous films of Ho-Co and Ho-Fe show that the principle mechanism responsible for differences in the $T_C$ of the crystalline and amorphous states is the altered electronic configuration of the transition metal, rather than local anisotropy. Additionally we found that the films possess uniaxial anisotropy.

Resonant structures at 9.4 and 10.3 MeV c.m. energy have been observed in both the reaction ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^{13}{}_{}{}^{}\mathrm{C}, \alpha ){}_{}{}^{21}{}_{}{}^{}\mathrm{Ne}$ and the elastic scattering of ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$ from ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$. Unambiguous assignments of $l=7\mathrm{}$ for both of the resonances are made.

We report for the first time coincident ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ and $\alpha$ particles emitted in the bombardment of ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$ with ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ ions of 64 MeV. Events which populate the ground and first excited states of ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ and ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$ are observed. The coincident ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ energy spectra are dominated by one or two large peaks near the highest allowable ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ energy. Relatively few coincidences are seen at ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ energies which correspond to maximum yield in the ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$(${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$, ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$) singles spectrum.

A description of the Coriolis kinking effect that occurs inside rotational bands of odd-even nuclei is obtained in terms of two distinct intrinsic states that are separately invariant under a unitarity transformation related to the operator $U=\exp (-i\pi J^2)$.

Electroexcitation of ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ has been measured. The strength for the $E2\mathrm{}$ (or $E0\mathrm{}$) resonances were extracted from the longitudinal form factors. In the region of 20-30-MeV excitation the strength exhausts approximately 20% of the sum rule for an $E2\mathrm{}$ interpretation, while the strength in the region below 20 MeV exhausts 43% of the same sum rule. The transverse form factor is compared with calculations using both the one-particle, one-hole and the generalized Goldhaber-Teller models.

We report new negative results for detection of gravitational radiation with a 500-kg, 1637-Hz detector of demonstrated sensitivity and detection efficiency. These results are compared with numerous detections reported by Weber. We conclude that those detections did not arise from gravitational radiation. Furthermore, gravity waves (or other impulsive excitations) could not have produced data with a coincidence peak as narrow as that published in September 1973.

Using data obtained from an exposure of the 30-in. Fermi National Accelerator Laboratory bubble chamber to a 205-GeV/c proton beam, results are presented on azimuthal distributions. Evidence is presented for dynamical azimuthal correlations whose behavior depends on the particular charge combination. The dependence of the azimuthal correlations on the rapidity difference and on the transverse momentum is also given.

The absolute photoionization cross sections for the outer $\mathrm{ns}$ subshells of argon, krypton, and xenon have been measured from their respective ionization thresholds to 41 eV as well as at one point near the ionization threshold of neon. The technique of photoelectron spectroscopy was used to determine the ratio of the $s$ to $p$ photoelectrons. Measurements of the total cross sections and of the magnitudes of multiple-ionization processes allowed an accurate determination of the subshell cross sections to be made.

We describe an optical process where off-diagonal optical excitation of a first atomic species is coupled during collision to a second species. This coupling leads to new types of nonlinear optical processes, and allows large cross sections for inelastic collision between atoms with nonresonant energy levels.

Lifetimes of the $M1\mathrm{}$ decay $2{}_{}{}^3{}_{}{}^{}S_1^{}{}_{}{}^{}\to 1{}_{}{}^1{}_{}{}^{}S_0^{}{}_{}{}^{}$ and of the decay $2{}_{}{}^3{}_{}{}^{}P_2^{}{}_{}{}^{}\to 1{}_{}{}^1{}_{}{}^{}S_0^{}{}_{}{}^{}$ have been measured in the two-electron ions ${\mathrm{V}}^{+21\mathrm{}}$ and ${\mathrm{Fe}}^{+24\mathrm{}}$. The measured lifetimes are $\tau \left(2\mathrm{}{}_{}{}^3{}_{}{}^{}S_1^{}{}_{}{}^{}\right)=16.9\mathrm{}\left(7\right)\mathrm{}$ nsec for ${\mathrm{V}}^{+21\mathrm{}}$ and $\tau \left(2\mathrm{}{}_{}{}^3{}_{}{}^{}S_1^{}{}_{}{}^{}\right)=4.8\mathrm{}\left(6\right)\mathrm{}$ nsec for ${\mathrm{Fe}}^{+24\mathrm{}}$. The $2{}_{}{}^3{}_{}{}^{}P_2^{}{}_{}{}^{}$ lifetimes are compared with a calculation that considers relativistic corrections and hyperfine-structure effects. It is found that for ${\mathrm{V}}^{+21\mathrm{}}$, hyperfine effects contribute appreciably to the lifetime. For ${\mathrm{Fe}}^{+24\mathrm{}}$ we obtain $\tau \left(2\mathrm{}{}_{}{}^3{}_{}{}^{}P_2^{}{}_{}{}^{}\right)=0.11\mathrm{}\left(2\right)\mathrm{}$ nsec.

The singular-eigenfunction-expansion method for solving the transport equation is applied to a modeled kinetic-theory Boltzmann equation to solve the problem of evaporation and condensation between parallel surfaces. A remarkable result is obtained for the temperature profile which seems to confirm previous predictions made on the basis of asymptotic approximations.

The lifetime of trapped electrons measured at $T<\mathrm{}1.5\mathrm{}$ K is found to be affected by factors which should not influence the intrinsic ion-vortex-line interaction. Observations indicate that the vortex lines move in the container, and the trapped charge escapes when the vortex lines interact with the container wall.

We present the first measurements of NMR behavior of superfluid ${\mathrm{He}}^3$ in high magnetic fields at melting pressures in the $A_1$ region in which only one spin species has undergone pairing. We observe a linear shift in the square of the transverse resonant frequency in $A_1$ with a pressure dependence of (9.52 ± 0.19)× ${10}^7$ ${\mathrm{}\left(\mathrm{Hz}\right)\mathrm{}}^2$/mbar, which is 0.188 ± 0.004 times the low-field result. This and other features that we report are in detailed agreement with the theory presented.

A high-current electron beam is used to produce a plasma from neutral hydrogen. Doppler-line-broadening and Thomson-scattering measurements show that the ion energy is 100 ± 15 eV compared with only 12 ± 2 eV for the electron energy. It is shown that this ion energy can be supplied by an inverse pinch effect. It is suggested that much higher ion energies will result for electron densities $n_e$ lower than ${10}^{15}$ ${\mathrm{cm}}^{-3\mathrm{}}$ measured here.

We show that the essential ingredients of the trapped-electron instability can be present in a cylindrical geometry. A linear instability theory, a simple physical explanation, and the results of an experiment are presented to support this.

We have observed the spin-dependent diffraction of slow neutrons by differentially polarized nuclei in single crystals of lanthanum magnesium nitrate. The effects are accompanied by enhanced Bragg diffraction and reduced incoherent scattering at high proton polarizations. The diffraction pattern is very sensitive to selective depolarization of nuclei, and proton resonances have been observed through changes in the diffracted intensities when the sample is irradiated at the Larmor frequencies.

We report results of x-ray Compton-Raman scattering experiments. In addition to the expected Compton and Raman scattering, there is a prominent feature in the form of a peak near $\frac{E}{E_{\mathrm{F}}}=1\mathrm{}$. The new peak can be explained qualitatively by considering the conduction band of lithium metal to be composed of hybridized orbital electrons, and it furnishes the first evidence of an $L$-x-ray Raman band.

Energy-band calculations on the Pb chalcogenides show that PbPo is a semimetal rather than a direct-gap semiconductor as predicted before. However, the results confirm the suggestion that PbTe is the irregular member of the family. This irregularity is directly related to an anomaly in the size of the Te atom and the lattice.

The critical scattering parameters have been calculated for an Ising-like system in a field, below and above $T_c$ up to second order in $\epsilon \mathrm{}(=4-d)\mathrm{}$. The corrections to the Ornstein-Zernike form in the small- and large-$q\xi$ limit are presented and their relevance to experiments is discussed.

The Coulomb energy of ${\mathrm{He}}^3$ has been calculated using separable potentials with a repulsive term. The calculated value is in close agreement with the ${\mathrm{H}}^3$-${\mathrm{He}}^3$ binding-energy difference. An expected 3-6% decrease, brought about mainly by the inclusion of a tensor term, can be explained by charge asymmetry due to $\eta -\pi$ and $\rho -\omega -\varphi$ mixing, provided one takes $\frac{g_{\rho }}{g_{\omega }}>0\mathrm{}$. This also yields $a_{\mathrm{nn}}-a_{\mathrm{pp}}>0\mathrm{}$, which is required by the present experimental situation, in contrast to $a_{\mathrm{nn}}-a_{\mathrm{pp}}\sim 1.4$ fm obtained by earlier authors with $\frac{g_{\rho }}{g_{\omega }}<0\mathrm{}$.