Using previously published differential cross sections for the production of charged pions at forward angles, total cross sections for neutral pion production in Ne+NaF collisions from 80 to 219 MeV/nucleon are estimated.

Predictions for magnetic moments and β-decay transition strengths of mirror nuclei can be made on the basis of empirical correlations between these quantities, and the technique is illustrated by deducing the magnetic moments of ${}_{}{}^{23}{}_{}{}^{}\mathrm{Mg}$, ${}_{}{}^{33}{}_{}{}^{}\mathrm{Cl}$, ${}_{}{}^{37}{}_{}{}^{}\mathrm{Ar}$, ${}_{}{}^{43}{}_{}{}^{}\mathrm{Ti}$, ${}_{}{}^{51}{}_{}{}^{}\mathrm{Fe}$, and ${}_{}{}^{55}{}_{}{}^{}\mathrm{Ni}$.

Nilsson orbital assignments for rotational bands in ${}_{}{}^{99}{}_{}{}^{}\mathrm{Y}$ were identified in a previous paper, which showed that γ-ray relative intensities (both intraband M1+E2 and interband M1 or E1 γ transitions) depopulating all levels in the three lowest bands in ${}_{}{}^{99}{}_{}{}^{}\mathrm{Y}$ were well reproduced by a simple particle-rotor model. The present paper examines a recent proposal that the 536-keV band be reassigned as (3/2[431] (instead of (3/2[301] as previously proposed) and shows that this (3/2[431] proposal cannot be reconciled with observed γ-decay patterns from levels in the 536-keV band.

The nucleon momentum distribution in the deuteron n(k), for k≤0.6 GeV/c, is extracted from the inclusive process ${}_{}{}^2{}_{}{}^{}\mathrm{H}$(e,e’)pn by a method based upon a theory of y scaling in which the nucleon momentum and binding are properly taken into account and the effects of final state interactions are also considered. The obtained momentum distribution remarkably agrees with the one extracted from the exclusive reaction ${}_{}{}^2{}_{}{}^{}\mathrm{H}$(e,e’p)n as well as with predictions from realistic two-nucleon interactions.

The pseudo-orbit seniority-zero states of protons and neutrons with pseudo-orbital (k) and pseudo-spin (i) angular momenta k=1 and i=(3/2, appropriate for single-particle levels {j}=1/2, (3/2, and (5/2, have been tabulated in both SU(4) [≃SO(6)] chains. For T<(1/2n, the representations occurring are such that quadratic Hamiltonians for either chain generally cannot be chosen to significantly favor those describing γ-unstable like spectra.

A recently obtained reduced set of coupled equations represents the scattering in the rotating frame. The corresponding scattering amplitude simplifies such that it is equivalent to having spinless states. Good agreement with exact calculations is obtained, including those for backward scattering angles.

New attributions of quantum numbers have been recently proposed for levels of ${}_{}{}^{195}{}_{}{}^{}\mathrm{Pt}$, on the basis of B(E2) and excitation energies. It is shown that the one neutron transfer reaction results reasonably support these attributions.

The accumulation of data on $\pi \mathrm{d}$ elastic scattering, particularly recent tensor polarization measurements, allow us to do an amplitude search for selected energies between 117 and 324 MeV. We also examine the effect of proposed analyzing power and spin-transfer measurements on our ability to uniquely determine these amplitude sets.

The data in deformed heavy nuclei are surveyed to disclose systematic evidence for the need for degrees of freedom outside the $\mathrm{sd}$ phenomenological interacting boson model (and most geometrical models) even at relatively low energies.

A new limit of the SU(3) symmetry scheme of the interacting boson-fermion model is suggested for deformed odd-mass nuclei. In this scheme, states are characterized by the intrinsic quantum number $K$, instead of the pseudo-orbital angular momentum of previous multi-$j$ symmetries of this type. An application to ${}_{}{}^{183-187}{}_{}{}^{}\mathrm{W}$ is presented.

The classical dynamics of nuclear polarization effects are studied at sub-Coulomb energies to estimate the orientation probability of deformed nuclei at the classical turning point. Implications of this study for the formation of giant nuclear molecules and for sub-Coulomb transfer of one neutron in ${}_{}{}^{238}{}_{}{}^{}\mathrm{U}$+${}_{}{}^{238}{}_{}{}^{}\mathrm{U}$ collisions are pointed out.

The multiphonon method based on $K^{\pi }=0^{+}$ and $K^{\pi }=0^{-}$ phonons is applied to ${}_{}{}^{234}{}_{}{}^{}\mathrm{U}$. The anharmonicities obtained for the octupole vibrations are smaller than in the light Ra and Th isotopes and not significantly altered by the coupling with the $K^{\pi }=0^{+}$ mode. The $I=K=0^{+}$ and the $I=1\mathrm{}$, $K=0^{-}$ states observed at 1044 and 1237 keV, respectively, cannot be interpreted as two-phonon states.

We present a phenomenological study of the ${}_{}{}^2{}_{}{}^{}\mathrm{H}$(d,γ${)\mathrm{}}^4$He reaction that allows for the D-state component of the colliding deuterons. The low-energy cross section is determined by an interference between E2 transitions from an initial ${}_{}{}^5{}_{}{}^{}\mathrm{S}_2^{}{}_{}{}^{}$ scattering state to either the D- or S-state components of ${}_{}{}^4{}_{}{}^{}\mathrm{He}$, the latter via the internal quadrupole moment of the deuteron. From a fit to the data, we determine the asymptotic D/S ratio of ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ to be ρ∼-0.40.

We argue that the standard derivation of the Gamow-Teller contribution to the ${}_{}{}^{37}{}_{}{}^{}\mathrm{Cl}$ solar neutrino capture cross section from the ${}_{}{}^{37}{}_{}{}^{}\mathrm{Ca}$ delayed proton spectrum yields a B(GT) distribution that is too weak and shifted to lower excitation energies. Because the redistribution of Gamow-Teller strength occurs primarily above the analog state, where the neutrino reaction phase space is small, it has only a small effect (4%) on the solar neutrino cross section. However, our observations help resolve the discrepancy between the ${}_{}{}^{37}{}_{}{}^{}\mathrm{Ca}$ β-decay and ${}_{}{}^{37}{}_{}{}^{}\mathrm{Cl}$(p,n) Gamow-Teller mappings.

The standard, three-body model of deuteron-nucleus elastic scattering and breakup is described by a Hamiltonian consisting of the neutron and proton binding interaction and their kinetic energy operators, while the interaction of each nucleon with the (unexcited) target nucleus is represented by an absorptive, optical-type potential at fixed energy. The standard method for solving this model involves expanding the three-body wave function in states of the neutron-proton system and then truncating some or all of the continuum states in the expansion. Within such an approximation technique, it is not possible to determine the importance of (the neglected) high-lying continuum states. Their contribution can in principle be estimated, however, by employing a solution algorithm which avoids the eigenstate expansion technique. This is done in the present paper by means of the finite element method, applied to the solution in coordinate space. Two different models for the potentials were investigated: that of Farrell, Vincent, and Austern, in which all form factors are of Gaussian type; and a second in which Woods-Saxon form factors were used for the absorptive potentials. The only stable results obtained were for elastic S-matrix elements of the model of Farrell, Vincent, and Austern. These results were in good agreement with the elastic S-matirx elements $S_L$ as calculated using an $L^2$ discretization (‘‘variational’’) procedure and via the continuum, discretized, coupled-channels method, at an incident energy of 22.9 MeV. This agreement confirms that neglect of the high-lying, neutron-proton continuum states is a valid approximation for determining elastic S-matrix elements. The persistent instability of the numerically determined, finite-element-method elastic $S_L$’s for the Woods-Saxon case and of the breakup S-matrix elements is an example of the inappropriate application of the asymptotic boundary conditions, recently discussed by Kuruoglu and Levin.

${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ recoils produced from the ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$(α,γ${)\mathrm{}}^{20}$Ne reaction were detected in coincidence with capture γ rays using a recoil separator, NaI(Tl) γ-ray detectors, and a helium gas target. Total cross sections for cascade and ground state capture were measured in the range $E_{\mathrm{c}.\mathrm{m}.\mathrm{}=1.7\mathrm{}–}$2.35 MeV. Improved measurements of the total width and resonance strength of the $E_{\mathrm{c}.\mathrm{m}.\mathrm{}=1.99\mathrm{}}$ MeV ($J^{\pi }$${=0\mathrm{}}^{+}$) resonance and the resonance strength of the $E_{\mathrm{c}.\mathrm{m}.\mathrm{}=1.054\mathrm{}}$ MeV ($J^{\pi }$${=1\mathrm{}}^{\mathrm{-}}$) resonance are reported. The astrophysical S factor for nonresonant capture into the ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ ground state was measured to be 0.26±0.07 MeV b, assuming an energy-independent S factor between $E_{\mathrm{c}.\mathrm{m}.\mathrm{}=1.7\mathrm{}}$ and 2.35 MeV. Using theoretical estimates for the energy dependence and branching ratios for the nonresonant capture, a best estimate for the total S factor at 300 keV of 0.7±0.3 MeV b is determined.

The total photoabsorption cross section of ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ and the longitudinal response function in the range of momentum transfers from 200 to 500 MeV/c are evaluated in the random-phase approximation. The random-phase-approximation polarization propagator is calculated by generalizing the doorway-state method previously developed for the Tamm-Dancoff approximation. The random-phase-approximation result is compared to the Tamm-Dancoff approximation and to experiment. The random-phase-approximation correlations cannot resolve the problem of missing strength in the quasielastic region in the range of momentum transfers between 300 and 500 MeV/c. At lower momentum transfer (200 MeV/c), as well as for photoabsorption, very good agreement with experiment can be obtained, provided other many-body effects are also taken into account. In our approach these other effects are accounted for by the imaginary part of the surface optical potential and by the width of the deeply bound hole states.

The total cross section for photon absorption of Al was measured for energies between 3 and 38 MeV with a γ-ray spectrometer consisting of a liquid deuterium target viewed by a photoneutron time-of-flight detector. Corrections to the observed total cross section for background electromagnetic processes in the absorber were computed by a Monte Carlo method. Between 5 and 8 MeV where the photonuclear cross section ${\sigma }_N$ is negligible and the uncertainty in the measurements is small, values of the atomic cross section ${\sigma }_Z$ calculated by others systematically exceed the measured values by 0.7%. In this energy interval ${\sigma }_Z$ is mainly due to incoherent photon scattering by atomic electrons. Nonrelativistic atomic form factors and estimated radiative corrections used in calculating the tabulated incoherent scattering cross sections introduced enough uncertainty to justify decreasing ${\sigma }_{\mathrm{incoh}}$ by 0.87% to bring ${\sigma }_Z$ into agreement with experiment. Correcting this discrepancy causes the integral between 10 and 38 MeV of ${\sigma }_N$, which has a maximum value of about 5% of ${\sigma }_Z$, to increase by 18% to 500 MeV mb. We conclude that the giant dipole resonance of ${}_{}{}^{27}{}_{}{}^{}\mathrm{Al}$ has a strength of 1.24 classical sum rule units.