The astrophysically important $3^{+}$ resonance of the ${}^{17}\mathrm{F}$$(p,\gamma )$${}^{18}\mathrm{Ne}$ reaction has been studied with the ${}^{16}\mathrm{O}$(${}^3\mathrm{He}$,$n)$${}^{18}\mathrm{Ne}$ reaction. High-resolution measurements were carried out for three different kinematic configurations. We find an excitation energy of 4527(4) keV and a proton width of 17(4) keV for the 3${}^{+}$ state. Measured differential cross sections were compared with Hauser-Feshbach predictions to assign the spin of the 4527-keV state and confirm the spin assignments of the two known levels in this region. Our results differ from the earlier ${}^{16}\mathrm{O}$(${}^3\mathrm{He}$,$n)$${}^{18}\mathrm{Ne}$ findings of García et al. [Phys. Rev. C 43, 2012 (1991)], but they agree well with the ${}^{17}\mathrm{F}$$(p,p){}^{17}\mathrm{F}$ measurements of Bardayan et al. [Phys. Rev. C 62, 055804 (2002)].

The Werner-Wheeler approach is used to calculate the components of the mass tensor for a binary configuration of two intersected spheroids. Four free coordinates form the deformation space: the small semiaxis of the projectile, the two semiaxis ratios of the spheroids, and the distance between centers. A correction term is also calculated, due to the center of mass motion. Final results are presented for the fusion channel ${}^{54}\mathrm{Cr}+{}^{240}\mathrm{Pu}$, and all possible couplings are analyzed.

In the two-neutron-transfer reaction of a 200-MeV ${}^{18}\mathrm{O}$ beam with a ${}^{238}\mathrm{U}$ target, deexcitation γ rays in a neutron-rich nucleus of ${}^{240}\mathrm{U}$ were measured. The γ rays in ${}^{240}\mathrm{U}$ were identified by taking coincidence with ${}^{16}\mathrm{O}$, using Si $\Delta E\text{−}E$ detectors. The kinetic energies of ${}^{16}\mathrm{O}$ particles allowed us to select the excitation energies of ${}^{240}\mathrm{U}$ below the neutron separation energy. The ground-state band and the $K^{\pi }=0^{-}$ octupole band of ${}^{240}\mathrm{U}$ were established up to ${12}^{+}$ and $9^{-}$, respectively. The octupole-band head of ${}^{240}\mathrm{U}$ is about a hundred keV higher than those of ${}^{236,238}\mathrm{U}$, suggesting that a secondary maximum of octupole correlations exists at $N=144-146$ in U isotopes.

We study the properties of light neutron-rich exotic nuclei with relativistic-mean-field models. The nonlinear isoscalar-isovector term that is not constrained by the present data is considered. The $\rho \mathrm{NN}$ tensor coupling is included. The data-to-data correlation between the neutron radius of ${}^{208}\mathrm{Pb}$ and that of light exotic oxygen, fluorine, and neon isotopes is enhanced by the inclusion of the $\rho \mathrm{NN}$ tensor coupling subject to the $2s_{1/2}$ occupation of the outlayer neutrons. This enhancement is determined by the single-particle property rather than by the bulk-matter property. The role of the $\rho \mathrm{NN}$ tensor coupling and the pairing correlation in reducing the model dependence of the neutron thickness in light exotic nuclei is investigated. The influence of the isoscalar-isovector term on halo neutrons, characteristic of the $2s_{1/2}$ occupation, is discussed.

A kinetically complete measurement of the ${}^{12}\mathrm{C}$(${}^{10}\mathrm{Be}$, $\alpha +\alpha +n$) and (${}^{10}\mathrm{Be}$, $\alpha +\alpha$) reactions has been performed at a beam energy of 30 MeV/nucleon. The charged beam velocity particles were detected in an array of Si-CsI detectors placed at zero degrees, and the neutrons in an 81-element neutron array. The coincident detection of the final-state particles, produced in the breakup of ${}^{10}\mathrm{Be}$, allowed the reconstruction of the excitation energy in the ${}^8\mathrm{Be}$ and ${}^9\mathrm{Be}$ systems. States in ${}^8\mathrm{Be}$ were identified, in particular the ground and first-excited states; and in ${}^9\mathrm{Be}$, states at 1.68, 2.43, and (2.78, 3.05) MeV were observed. The population of these levels, in particular the 2.43 MeV $5/2^{-}$ level, suggests that collective excitations play an important role in the neutron removal process. Distorted wave Born approximation and Glauber-type calculations have been used to model the direct neutron removal from the ${}^{10}\mathrm{Be}$ ground state and the two-step removal via inelastic excitations of the ${}^{10}\mathrm{Be}$(2${}^{+}$) and ${}^9\mathrm{Be}(5/2^{-})$ excited states.

Great interest has attached to recent d+Au, $\sqrt{s}=200A$ GeV data at RHIC, obtained with the BRAHMS detector. Between pseudorapidities $\eta =0$ and $\eta =3.2$ the appropriately defined ratio R[dAu/pp], comparing transverse-momentum spectra of d+Au to pp, exhibits a steady decrease with η. This diminution is examined within a two-stage simulation. In the first stage, initial nucleon-nucleon interactions are treated in parallel, as if occurring simultaneously, whereas the second stage is a considerably reduced energy hadronic cascade. This approach is by no means a standard hadronic cascade, never entailing an overly high density of cascading particles. Indeed a condition is imposed on the total multiplicity at the outset of the second stage permitting no overlap of intermediate interacting prehadrons. The result is an adequate description of the data, including the so-called Cronin effect. Additionally there is, in the second stage, clear evidence for suppression of relatively high trans-verse momentum $\eta =0$ leading mesons (i.e., the Cronin effect is appreciably muted by final state interactions).

The branching ratio (BR) for the rare decay $\eta \to {\pi }^0\gamma \gamma$ was measured with the Crystal Ball multiphoton spectrometer. The result, BR$(\eta \to {\pi }^0\gamma \gamma )=(3.5\pm 0.7_{\mathrm{stat}}\pm 0.6_{\mathrm{syst}})\times {10}^{-4}$, is in agreement with calculations of chiral perturbation theory to third order. We have used a sample of 28 million η mesons produced at the BNL Alternating Gradient Synchrotron using the ${\pi }^{-}p\to \eta n$ reaction close to threshold. We detail the intricate extraction of the signal, which has about 1.6 thousand $\eta \to {\pi }^0\gamma \gamma$ events, from the overwhelming background of $\eta \to 3{\pi }^0$ decays and from the ${\pi }^{-}p\to {\pi }^0{\pi }^{0}n$ reaction.

The g factor of the $2_1^{+}$ state of ${}^{160}\mathrm{Er}$ was measured by perturbed $\gamma \text{−}\gamma$ angular correlation in a static external magnetic field of 5.82 T. The result, $g(2_1^{+})=0.33(6)$, is discussed within the systematics of g factors of even-even isotopes for the Ba-Pt region.

Our article neglected to cite the work of Coraggio et al. [1], where a low-momentum NN potential derived from the CD-Bonn NN potential was used to construct an effective interaction for a ${}^{132}\mathrm{Sn}$ core. This interaction was used to compare with the experimental energy level spectra of ${}^{132}\mathrm{Sb}$ and other nearby nuclei.

A simple quark-diquark model of baryons with direct and exchange interactions has been constructed. Spectrum and form factors have been calculated and compared with experimental data. Advantages and disadvantages of the model are discussed.

The Primakoff effect offers us a way to determine the radiative decay width of pseudoscalar mesons when they are photoproduced in the electromagnetic field of hadronic systems. Taking advantage of recent developments in the Regge description of the production of mesons in the strong hadronic field, this paper evaluates the relative importance of the electromagnetic and the strong amplitudes and assesses the possibilities that have become opened because of modern experimental facilities.

The relation connecting an angular momentum dependence of the γ-transition energies with the reduced transition probabilities $B[E2;(I+2){}_{\mathrm{gr}}\to I_{\mathrm{gr}}]$ in the ground-state rotational band is derived based on the Bohr Hamiltonian. The relation is applicable to both β-rigid and β-soft both being γ-rigid nuclei. Based on this result the approximate expression is obtained for the intrinsic quadrupole moment and, therefore, for the spectroscopic quadrupole moment in terms of the reduced E2 transition probabilities. It is shown that an angular momentum dependence of the intrinsic quadrupole moment can be well approximated by a linear function of I. The results obtained are direct consequences of the Bohr Hamiltonian with the Davidson potential.

Low-lying excited states of ${}^{46}\mathrm{Ar}$ have been studied via inverse-kinematics proton scattering with a thick target. Coupled-channels calculations have been used to extract the deformation length of the $2_1^{+}$ state. This result, combined with existing Coulomb excitation data, yields a ratio of the neutron-to-proton transition matrix elements of $M_n/M_p=1.19(25)N/Z$, showing a departure from the proton dominance observed in the $N=28$ isotones above ${}^{48}\mathrm{Ca}$. The status of the $N=28$ shell below ${}^{48}\mathrm{Ca}$ is discussed.

The study of the hyperfine anomaly of neutron rich nuclei, in particular, neutron halo nuclei, can give a very specific and unique way to measure their neutron distribution and confirm a halo structure. The hyperfine structure anomaly in ${\text{Be}}^{+}$ ions is calculated with a realistic electronic wave function, obtained as a solution of the Dirac equation. In the calculations, the Coulomb potential modified by the charge distribution of the clustered nucleus and three electrons in the $1s^{2}2s$ configuration is used. The nuclear wave function is obtained in the core+nucleon model of ${}^{9,11}\mathrm{Be}$. The aim of this study is to test whether the hyperfine structure anomaly reflects a halo structure in ${}^{11}\mathrm{Be}$.

The bound state energy eigenvalues and the corresponding eigenfunctions of the generalized Woods-Saxon potential are obtained by means of Nikiforov-Uvarov (NU) method. Certain bound states of the Schrödinger equation for the potential are calculated analytically and the wave functions are found in terms of the Jacobi polynomials. It is shown that the results are in good agreement with those obtained previously.

We extract the pairing gap in ${}^{184}\mathrm{W}$ at finite temperature for the first time from the experimental level densities of ${}^{183}\mathrm{W}$, ${}^{184}\mathrm{W}$, and ${}^{185}\mathrm{W}$ using the “thermal” odd-even mass difference. We found the quenching of the pairing gap near the critical temperature $T_c=0.47\text{MeV}$ in the BCS calculations. It is shown that the monopole pairing model with a deformed Woods-Saxon potential explains the reduction of the pairing correlation using the partition function with the number parity projection in the static path approximation plus random-phase approximation.

The Gamow-Teller $\beta$ decay of ${}^{46}\mathrm{Cr}$ to the $N=Z$ odd-odd nucleus ${}^{46}\mathrm{V}$ has been observed for the first time. ${}^{46}\mathrm{Cr}$ was produced by the fragmentation of a ${}^{50}\mathrm{Cr}$ primary beam at 80 MeV/nucleon. By means of $\beta \text{−}\gamma$ coincidence measurements, a γ-ray peak at 993 keV corresponding to the decay of the $1_1^{+}$ state in ${}^{46}\mathrm{V}$ was observed. The branching ratio of the Gamow-Teller decay to this state was found to be $b_{\mathrm{GT}}=0.216\pm 0.050$. The half-life of ${}^{46}\mathrm{Cr}$ was measured to be $T_{1/2}=240\pm 140$ ms. The transition strength was determined to be $B(\mathrm{GT})=0.64\pm 0.20$. This result was compared with theoretical values calculated with the shell model and the phenomenological quasideuteron model.

The ${}^{14}\mathrm{O}+p$ elastic scattering is discussed in detail in a fully microscopic cluster model. The ${}^{14}\mathrm{O}$ cluster is described by a closed p shell for protons and a closed $p3/2$ subshell for neutrons in the translation-invariant harmonic-oscillator model. The exchange and spin-orbit parameters of the effective forces are tuned on the energy levels of the ${}^{15}\mathrm{C}$ mirror system. With the generator-coordinate and microscopic R-matrix methods, phase shifts and cross sections are calculated for the ${}^{14}\mathrm{O}+p$ elastic scattering. An excellent agreement is found with recent experimental data. A comparison is performed with phenomenological R-matrix fits. Resonances properties in ${}^{15}\mathrm{F}$ are discussed.

Improving previous calculations, we compute the $D+\overline{D}\to J/\psi +\pi$ cross section using the most complete effective Lagrangians available. The new crucial ingredients are the form factors on the charm meson vertices, which are determined from QCD sum rules calculations. Some of them became available only very recently, and the last one, needed for our present purpose, is calculated in this work.

We derive relation formulas for proton depolarizations in proton-${}^3\mathrm{He}$ ($p\text{−}$${}^3\mathrm{He}$) elastic scattering in a form that makes it easy to identify contributions of spin-dependent interactions. The formulas explain approximate relations found in the depolarizations measured at $E_p=800\text{MeV}$ when the magnitudes of scattering amplitudes due to $p\text{−}$${}^3\mathrm{He}$ spin–spin and tensor interactions are small. This nature of the interactions is investigated from the viewpoint of folding models. It is shown that the spin–spin and tensor interactions are significantly diminished owing to characteristics of nucleon densities of ${}^3\mathrm{He}$, which are calculated from a solution of the Faddeev equation. A folding model calculation with the densities and a simple nuclear potential shows that the $p\text{−}$${}^3\mathrm{He}$ spin–spin interaction is much weaker than the spin-independent central interaction.