The inelastic magnetic scattering from a single crystal of ${\mathrm{Cr}}_{0.98}$${\mathrm{Mn}}_{0.02}$ alloy has been studied both below and above the Néel temperature. Measurements at 300 K using the diffraction method have yielded a value for the spin-wave velocity of 1.29±0.26×${10}^7$ cm/sec in good agreement with theoretical predictions. At a temperature of $1.16T_{\mathrm{N}}$ inelastic magnetic scattering persists strongly even though there is no ordered or localized moment. This scattering has been interpreted as being due to paramagnonlike excitations, and a line-shape calculation based on this theory fits the experimental results quite well.

Stripping reactions on odd-$A$ nuclei to states of nonzero spin may involve two or more values of the total angular-momentum transfer $j_n$ for the captured nucleon. Results for the reaction ${}_{}{}^{53}{}_{}{}^{}\mathrm{Cr}(d, p){}_{}{}^{54}{}_{}{}^{}\mathrm{Cr}_{}^{*}{}_{}{}^{}$ ($Q=6.71\mathrm{}$ MeV), initiated by vector-polarized deuterons, show that measurements of the vector analyzing power can be used to determine the separate cross-section contributions for the possible $j_n$ values.

The sign and magnitude of the haxadecapole deformation in ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ is determined from measurements of the inelastic scattering of 24.5-MeV protons. A coupled-channels analysis yields a value for ${\beta }_4$ of + 0.28. A similar analysis of other available data in the $s-d$ shell suggests a large hexadecapole deformation in ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$ (+0.25) and ${}_{}{}^{32}{}_{}{}^{}\mathrm{S}$ (+0.25); ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$ is found to have a $Y_4$ moment close to zero.

The static quadrupole moments of the first excited $J^{\pi }=2^{+}$ states in ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$ and ${}_{}{}^{62}{}_{}{}^{}\mathrm{Ni}$ were measured to be $Q=0.17\mathrm{}\pm 0.05$ b and $Q=0.08\mathrm{}\pm 0.12$ b, respectively, using the reorientation effect in Coulomb excitation with 70-MeV ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$ projectiles incident on a ${}_{}{}^{62}{}_{}{}^{}\mathrm{Ni}$ target.

Angular distributions for the reaction ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}(\gamma , p){}_{}{}^{15}{}_{}{}^{}\mathrm{N}$ are presented from 21 to 32.5 MeV. The asymmetry coefficients $A_1$ and $A_3$ increase to a maximum at 30 MeV and indicate a broad quadrupole state centered near 27 MeV.

A search for the rare $K^{+}$ decay mode $K^{+}\to {\pi }^{+}\nu \overline{\nu }$ has been carried out using stopping $K^{+}$ mesons in a heavy-liquid bubble chamber. No events were found, and an upper limit on the branching ratio of this mode of 5 × ${10}^{-5\mathrm{}}$ to all $K^{+}$ decays is obtained. Comparison is made with various theories which imply the existence of neutral neutrino currents.

A systematic approach to the construction of new types of correlated many-particle trial functions is outlined. It is based on the formalism of a special type of multidimensional integral transformation, and combines a conceptually simple geometrical interpretation with computational practicability and the possibility of classifying the correlated wave functions in a simple manner. The approach is applicable to the formation of new, multicenter molecular orbitals as well.

$\pi \pi$ scattering in the di-pion mass region 1.0-1.4 GeV is analyzed. It is shown that an anomaly of the ${\pi }^{-}{\pi }^{+}$ state in the region 1.0-1.2 GeV is either an $I=0\mathrm{}$ $D$-wave amplitude which interferes with a nearly static $I=1\mathrm{}$ $P$-wave amplitude or a Breit-Wigner $D$ wave which interferes with a moving $P$ wave (possibly resonant). The $f^0$ meson seems to show considerable inelasticity.

We have measured the ${{\delta }_0}^0$ phase shifts from ${\pi }^{+}{\pi }^{-}$ elastic scattering and compared the four possible solutions with our ${\pi }^0{\pi }^0$ mass spectrum. Only one solution, characterized by a very gradual increase of the phase shifts to 90°, compares favorably.

Interleaved layers of nuclear photographic emulsion and plastic detectors, covering a total area of 21 ${\mathrm{m}}^2$, were exposed to the primary cosmic radiation on high-altitude balloon flights. Flux values, in particles/${\mathrm{m}}^2$ sr sec, have been estimated to be $J(Z>~33)>~2.6\times {10}^{-5\mathrm{}},$ $J(33\mathrm{}<~Z<~40)<~1.9\times {10}^{-5\mathrm{}},$ $J(Z>~70)\gtrsim 1\times {10}^{-6\mathrm{}}.$ These values refer to the top of the atmosphere, after extrapolation through 1.5 g/${\mathrm{cm}}^2$ of detector and 3.5 g/${\mathrm{cm}}^2$ of atmosphere, for particles with magnetic rigidities above 5 GeV.

We present an experimental study of the low-momentum-transfer ${\Delta }^{++}n$ component of 6424 $\mathrm{pp}\to p{\pi }^{+}n$ events at 6.6 GeV/c. The ${\pi }^{+}p$ elastic cross sections in the ${\Delta }^{++}$ region are measured by means of several different pole-extrapolation procedures. We find that the conventional Chew-Low extrapolation procedure yields results not in satisfactory agreement with the known on-shell cross sections. We suggest a modified extrapolation procedure which in our case yields results in good agreement with the on-shell values.

It is suggested that all Regge trajectories $\alpha \mathrm{}\left(t\right)\mathrm{}$ have a branch point at $t=0\mathrm{}$ and are complex for negative $t$. A number of consequences and conjectures based on this possibility are discussed.

We consider the symmetry of leptonic weak and electromagnetic interactions unified in a model free of quadratic divergences. Explicit values for intermediate boson masses and coupling constants are obtained from the requirement of finite self-masses for leptons.

We propose to scatter unpolarized protons from a proton target polarized in three mutual directions and measure the polarization of the recoil proton in the same direction as the target polarization. The directions of polarization are perpendicular to the scattering plane, in the direction of the recoil proton, and orthogonal to the above two. The results of this measurement can be used to differentiate Regge-pole theory from the impact-factor representation.

We calculate the $K_{l3\mathrm{}}$ decay parameters on the basis of the maximal information obtainable from hard-meson current algebra in the single-particle saturation approximation. The calculation includes fully the effects of the kappa meson reported recently by Trippe et al. It is noted that our results automatically lead to those following from chiral SU(3)⊗SU(3) broken with (3*,3) ⊕ (3,3*).

A new definition of strong duality is suggested, namely that crossed-channel trajectories are built out of direct-channel trajectories. This definition is unambiguous and reduces to the usual statement of strong duality if the resonance amplitudes are chosen appropriately. The role of unitarity appears to be of some importance, and it is found that the nonunitary Veneziano model does not exhibit strong duality defined in this way.

The $6s{}_{}{}^2{}_{}{}^{}S_{\frac{1}{2}}^{}{}_{}{}^{}$ ground ionic state of even isotopes of mercury was polarized in a stepwise excitation process from the atomic $6s^2{}_{}{}^1{}_{}{}^{}S_0^{}{}_{}{}^{}$ ground state via the metastable $6s6p{}_{}{}^3{}_{}{}^{}P_2^{}{}_{}{}^{}$ state. The latter was optically pumped with polarized 5461-Å ($6s7s{}_{}{}^3{}_{}{}^{}S_1^{}{}_{}{}^{}-{}_{}{}^3{}_{}{}^{}P_2^{}{}_{}{}^{}$) radiation. Paramagnetic resonance, observed by monitoring the change in intensity of the relatively intense 2851-Å ($5d^{9}6s^2{}_{}{}^2{}_{}{}^{}D_{\frac{5}{2}}^{}{}_{}{}^{}-5\mathrm{}{d}^{10}6s{}_{}{}^2{}_{}{}^{}S_{\frac{1}{2}}^{}{}_{}{}^{}$) electric quadrupole resonance radiation, was used to determine the polarization of the even-isotope ground-state ion to be 15%. If one assumes conservation of spin angular momentum, this process should yield highly polarized electrons.

Polarized cesium atoms were ionized by circularly polarized light. The cesium-ion intensities obtained with positive and negative photon helicities were measured at various wavelengths. The results demonstrate that the wave functions for the continuum states of cesium are perturbed by a spin-orbit interaction in accordance with the theoretical interpretations given by Seaton and Fano.

Neutron emission by radiationless $\mu$-atomic transitions in ${\mathrm{Bi}}^{209}$ has been observed. The analysis of the neutron time-of-flight spectrum shows that this process takes place in muon transitions from the $n=3\mathrm{}$ or higher states to the ground state of the muonic atom while the nucleus is left either in the ground state or in an excited state, possibly one belonging to a particle-hole multiplet of ${\mathrm{Bi}}^{208}$. The process investigated here occurs in 7 ± 2% of all muon stops in bismuth.

The magnetic gas-torque effect in polyatomic gases (the Scott effect) has been examined experimentally by means of a torsion pendulum with both linear and cylindrical torque-sensing elements. The addition of barriers installed to impede possible bulk rotation of the gas (oxygen in these experiments) reduced the torque appreciably. These observations suggest that rotation of the gas contributes to the torque.