I interpret $\psi \mathrm{}\left(3095\right)\mathrm{}$ and ${\psi }^{\prime }\mathrm{}\left(3684\right)\mathrm{}$ as space and color excitations in a model in which a quark is a composite of a Fermi, spin-½, ordinary SU(3) object and a Bose, spin-0, color SU(3) object, and a meson is a four-body object. Color conservation and the absence of dipole transitions from the space mode make these two $\psi \text{'}\mathrm{s}$ narrow for nonradiative and for radiative decays, respectively, to the usual hadrons.

Cross sections for $e^{+}{e}^{-}\to \mathrm{hadrons}, e^{+}{e}^{-}, \mathrm{and} {\mu }^{+}{\mu }^{-}$ near 3684 MeV are presented. The $\psi \mathrm{}\left(3684\right)\mathrm{}$ resonance is established as having the assignment $J^{\mathrm{PC}}=1^{--}$. The mass is 3684 ± 5 MeV. The partial width for decay to electrons is ${\Gamma }_e=2.1\mathrm{}\pm 0.3$ keV and the total width is $\Gamma =228\mathrm{}\pm 56$ keV.

A lower limit for the lab energy of a magnetic monopole produced from a stationary target is derived and used to study implications of the data of Price et al.

We investigate the $\Lambda p$ invariant-mass distribution, observed by Cline, Laumann, and Mapp, with a two-channel formalism. We come to the conclusions (1) that the peak just below the $\Sigma N$ threshold is mainly due to a $\Lambda p$ resonance (it would not be explained by a kinematical effect alone), and (2) that the peak just above the $\Lambda N$ threshold is due to the two-channel final-state interaction.

We present systematics of the ground-state $\alpha$-particle spectroscopic strengths for nuclei from ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ to ${}_{}{}^{66}{}_{}{}^{}\mathrm{Zn}$, measured in the (${}_{}{}^6{}_{}{}^{}\mathrm{Li}$, $d$) reaction. An oscillatory decrease from ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ to ${}_{}{}^{32}{}_{}{}^{}\mathrm{S}$, which is in excellent agreement with SU(3) theory, is followed by a striking and unexplained increase at ${}_{}{}^{36}{}_{}{}^{}\mathrm{Ar}$ and ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$ and then a decrease up to ${}_{}{}^{52}{}_{}{}^{}\mathrm{Ti}$, after which there is again a rise.

The angular distributions of the vector analyzing power have been measured in the reactions ${}_{}{}^2{}_{}{}^{}\mathrm{H}(p, p)np$ and ${}_{}{}^1{}_{}{}^{}\mathrm{H}(d, p)np$ at 22.7 and 45.4 MeV, respectively, corresponding to the same center-of-mass energy. Significant analyzing powers were found in the production of final-state $\mathrm{np}$ pairs with low relative energies, and the angular distributions show a remarkable similarity to those of the corresponding elastic scattering.

The total isovector $M1\mathrm{}$ $\gamma$-decay rate of the 16.6-16.9-MeV doublet in ${}_{}{}^8{}_{}{}^{}\mathrm{Be}$ to the broad first excited state has been measured with the reaction ${}_{}{}^4{}_{}{}^{}\mathrm{He}({}_{}{}^4{}_{}{}^{}\mathrm{He}, \gamma )$. A width of 4.8 ± 0.7 eV has been found. When properly interpreted, this result seems consistent with predictions of conserved vector currect theory and with the absence of a second-class induced-tensor form factor.

The reaction ${}_{}{}^{235}{}_{}{}^{}\mathrm{U}(d, p){}_{}{}^{236}{}_{}{}^{}\mathrm{U}\mathrm{}\left(f\right)\mathrm{}$ was studied at $E_d=13, 15, \mathrm{and} 17$ MeV with ${\theta }_p=60\mathrm{}° \mathrm{and} 140°$. The proton spectra in coincidence with fission fragments show a series of new narrow subbarrier resonances in ${}_{}{}^{236}{}_{}{}^{}\mathrm{U}$ above the known resonance at $E_x=5.12\mathrm{}$ MeV. These are interpreted as vibrational modes orthogonal to and coupled weakly to the $K=0^{+}$ fission vibration. Resonance centroids and experimental widths are extracted.

We report high-resolution measurements of the differential cross section for scattering Na in its $3S_{\frac{1}{2}}$ and $3P_{\frac{3}{2}}$ states from Ne. A new scheme is used to maintain a high fraction (∼20%) of an atomic beam of Na in the excited state for many radiative lifetimes using a single-mode cw dye laser. The differential cross sections are interpreted to yield interatomic potential curves for both the $X\Sigma$ and $A\Pi$ states of the NaNe molecule which seriously disagree with recent pseudopotential calculations.

We point out that it now appears very likely that because of the properties of the exchange amplitude the customary forward dispersion relations do not hold for electron-atom elastic scattering.

Using a Born-Oppenheimer-type expansion for the two-electron wave functions in hyperspherical coordinates, three potential curves are obtained for ${\mathrm{H}}^{-}$ ${}_{}{}^1{}_{}{}^{}P$ states converging to the $n=2\mathrm{}$ state of the hydrogen atom. It is shown that the Feshbach resonances are associated with one curve and the shape resonance with another. The connections with the "+" and "-" classification of helium doubly excited states and with the asymptotic dipole-field representation of ${\mathrm{H}}^{-}$ are discussed.

We have demonstrated that quantum selected populations of $\mathrm{He}\left(2\mathrm{}{}_{}{}^1{}_{}{}^{}S\right)$ can be converted completely to ionization by single-photon excitation to $\mathrm{He}\left(3\mathrm{}{}_{}{}^1{}_{}{}^{}P\right)$ followed by collision-induced associative ionization. For helium pressures between 15 and 100 Torr, saturation of ionization was observed whenever a tunable dye laser produced more than 0.1 J/pulse. Absolute numbers of $\mathrm{He}\left(2\mathrm{}{}_{}{}^1{}_{}{}^{}S\right)$ per ion pair formed from proton interaction and the decay rates of $\mathrm{He}\left(2\mathrm{}{}_{}{}^1{}_{}{}^{}S\right)$ support a recent energy-pathways model.

We discuss advantages of surface confinement such as plasma stability, direct injection of ion beams, electrostatic confinement, negligible synchrotron loss, and "geometric mirror." Preliminary experimental results are presented.

The pinch phenomenon in relativistic diodes is used with proper design of the anode surface to construct a theoretical scheme for ion acceleration. We analyze the early-time formation of the ion source, and give the approximate solutions for the steady state of ion and electron flow. Efficient conversion (>50%) of electron current into ion current is predicted. The energetic ions are accelerated radially inwards in spherical geometry. Application to the generation of intense neutron pulses and pellet compression is discussed.

Observations of the wall-pinned mode in ${}_{}{}^3{}_{}{}^{}\mathrm{He}$-$B$ allow new magnetic relaxation phenomena to be studied. Excepting the quantitative value of the zero-time ringing frequency, comparison of experiment with theory is satisfactory, including a linear dependence of the square of the ringing period on time and a square-root singularity near $T_c$ in the relaxation parameter.

We have directly observed the sign reversal of the wave function of a fermion produced by its precession of $2\pi$ radians in a magnetic field using a neutron interferometer.

A calculation is made of the energy levels of the bound states of a strange quark and its antiquark with an interaction which includes an attractive Coulomb potential term, a confining linear potential, and spin-orbit, quadratic-orbit, spin-spin, and quadratic-spin interactions. Good agreement is obtained with observed mesons, and the existence of other mesons is predicted.

Significant two-particle correlations of dynamical origin are observed in 200 GeV/c ${\pi }^{-}p$ inclusive interactions. This is demonstrated by comparison with kinematic correlations calculated from an independent-particle-emission model. Two distinct correlation types are observed: (a) unlike-particle correlations with correlation length ∼ 1.3 rapidity units independent of azimuthal separation, and (b) like-particle correlations with correlation length ∼ 0.4 rapidity units which are observed only for small azimuthal separations.

We discuss possible mass spectroscopy of vector-meson states in a color scheme, namely the SU(3)′ ⊗ SU(3)″ scheme of Han and Nambu. Interesting mass formulas are derived under some dynamical assumptions. These are compared with those of Sanda and Terazawa. Two possible assignments for the $\psi$ particles (including the one at ∼4.1 GeV) are considered.

A study of the inclusive reaction ${\pi }^{+}+A\to X+\mathrm{anything}$ has been analyzed for 235-MeV pions and Mg, Ni, and Ag targets with $X=p, d, t, {}_{}{}^3{}_{}{}^{}\mathrm{He}, \mathrm{and} {}_{}{}^4{}_{}{}^{}\mathrm{He}$ in the energy range 15-400 MeV. The cross section for proton emission is found to be as much as a factor of 8 less than that predicted by intranuclear-cascade calculations. The complex-particle-emission cross sections are found to be consistent with a nucleon-pickup mechanism.