The elastic scattering of kaons on ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ is investigated using Kerman-McManus-Thaler theory, and the effect of a u-channel term as well as the usual t-channel terms in the ${\mathit{K}}^{+}$N t matrix is computed. So long as the total forward ${\mathit{K}}^{+}$N scattering amplitude is fitted, its division in t- and u-channel terms is found to be immaterial. Thus the theoretical underestimate of the ${\mathit{K}}^{+}$-nucleus cross section cannot be explained by the presence of a u-channel contribution. Higher-order Kerman-McManus-Thaler effects are estimated to be negligible. A comparison with previous investigations is made.

The dipole response of the neutron-rich nucleus ${}_{}{}^{11}{}_{}{}^{}\mathrm{Li}$ is calculated in the random phase approximation and compared with the recent experimental measurement of Coulomb breakup by Kobayashi et al. While th theory predicts a softening of the dipole mode as expected, the response is not sufficiently enhanced to explain the experimental data. This shows the need for a theory that deals with correlations beyond those included in random phase approximation.

We present a calculation of the parity-violating analyzing power in proton-proton scattering using weak coupling constants predicted by the topological chiral soliton model of the nucleon. The results are compared with the predictions using quark-model parity-violating parameters. We also perform a calculation using weak and strong vertex functions obtained consistently from the chiral soliton model. Within the framework of that model, we can justify the use of the same form factors for the weak and strong meson-nucleon vertices. We discuss the predictive power of a planned experiment at Tt/${\mathrm{r}}_{\mathit{l}\mathit{a}\mathit{b}}$=222 MeV.

Neutral pion photoproduction on the neutron near threshold is investigated with the dynamical model of Nozawa, Blankleider, and Lee. It is shown that the final state interaction amplitude derived from the dynamical model could involve large cancellations between the different pion photoproduction mechanisms. We find that the final state interaction plays an essential role in this channel because of the small Born amplitude. At threshold, we obtain ${\mathit{E}}_{0+}$(${\mathrm{\pi }}^0$n) =0.21×${10}^{\mathrm{-}3}$/${\mathit{m}}_{\mathrm{\pi }}^{+}$. .AE

Transverse momentum distributions recently measured in the radioactive projectile fragmentation at 790 MeV/nucleon are compared to the extended Serber model calculations. It is shown that the observed widths are roughly consistent with the quasifree stripping of a few loosely bound neutrons from the neutron-rich nuclei.

Three- and four-body correlations arising because of the truncation of the configuration space are calculated. These are found to be rather small. Interestingly, three-body and four-body parts of the correlations in general have opposite signs and cancel each other. Only rarely these add and become significant. This, therefore, lends support to the usage of the effective two-body interactions in the nuclear structure calculations in relatively small model spaces. It is also explicitly demonstrated through the results of the approximate shell-model calculations using broken-pair formalism.

The matrix elements involved in the double-beta-decay process for the nuclei ${}_{}{}^{76}{}_{}{}^{}\mathrm{Ge}$ and ${}_{}{}^{82}{}_{}{}^{}\mathrm{Se}$ are calculated in terms of the variational wave functions resulting from realistic effective interactions operating in the unrestricted (2${\mathit{p}}_{1/2}$, 2${\mathit{p}}_{3/2}$, 1${\mathit{f}}_{5/2}$, 1${\mathit{g}}_{9/2}$${)}^{\mathrm{\pi },\nu }$ configuration space.

The optical potential for elastic scattering of protons from ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ at incident beam energies between 100 and 500 MeV is calculated from a full-folding integral of a simple s-p-shell representation of the target density matrix together with fully off-shell nucleon-nucleon t matrices derived from two different Bonn meson exchange models. Elastic scattering observables calculated from this full-folding optical potential are compared to those obtained from ‘‘optimum factorized’’ as well as on-shell local (‘‘tρ’’) approximations. The optimum factorization is found to provide a good approximation to elastic scattering observables obtained from the full-folding optical potential, although the potentials differ in the structure of their nonlocality. A perturbative treatment of the nonlocality is used to extract approximate localized potentials and associated Perey damping factors for the interior wave functions. The results indicate that the interior wave function from the optimum factorization potential and the full-folding potential are very similar.

The cross section of ${}_{}{}^2{}_{}{}^{}\mathrm{H}$(e,e’)pn reaction near breakup threshold at backward angles is calculated nonrelativistically. Unlike in most previous calculations, the contributions from isobar currents are calculated nonperturbatively. The meson exchange currents are evaluated consistently with the same vertex characteristics as those used to calculate the deuteron and the scattering wave functions.

The relation among various recently proposed theories for inclusive breakup reactions is clarified from a unified viewpoint. Udagawa and Tamura’s prior form formalism, Ichimura, Austern, and Vincent’s post form formalism, and Hussein and McVoy’s formalism are understood on a common basis by referring to a three-body model of Austern et al.

The gauge dependence of nonrelativistic calculations of deuteron photodisintegration is investigated within simple one-pion and one-pion-one-rho exchange models with consistent exchange currents and for the realistic Paris and Bonn potentials. If no explicit exchange currents are considered but Siegert operators are used, the gauge dependence increases with energy and amounts to about 5 percent at 140 MeV. Inclusion of the dominant π- and ρ-exchange currents reduces this dependence to less than 1 percent at 140 MeV in contrast to other claims.

Eleven fragments of the 1${\mathit{g}}_{9/2}$ isobaric analog state in ${}_{}{}^{61}{}_{}{}^{}\mathrm{Cu}$ have been found. To locate these fragments ${}_{}{}^{60}{}_{}{}^{}\mathrm{Ni}$(p,${\mathit{p}}_1$γ) and ${}_{}{}^{60}{}_{}{}^{}\mathrm{Ni}$(p,γ${)}^{61}$Cu reactions were used. The excitation functions were measured in the ${\mathit{E}}_{\mathit{p}}$t/${\mathrm{r}}^{\mathit{l}\mathit{a}\mathit{b}}$=3.67–3.83 MeV proton energy range. To determine the spins of the resonances, γ angular distributions were measured. Partial widths for each resonance fragment were deduced and fine structure analyses were carried out in the different channels. The inelastic spectroscopic factor was derived for the 1${\mathit{g}}_{9/2}$ isobaric analog state. The results are compared with previous works.

Neutron capture gamma rays from the 84-keV ${\mathit{p}}_{3/2}$-wave resonance, 266-keV ${\mathit{p}}_{1/2}$-wave resonance, and 431-keV ${\mathit{p}}_{3/2}$-wave resonance in ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$ that have large reduced neutron width have been measured with an anti-Compton NaI(Tl) detector, using a time-of-flight technique. Successful extraction of gamma-ray intensities for transitions to low-lying states in ${}_{}{}^{25}{}_{}{}^{}\mathrm{Mg}$ was performed by an iterative unfolding method, in order to deduce partial radiative widths. Also, we have made an experimental contrivance separating the kernel of the 266-keV broad resonance from that of the 257-keV overlapping narrow resonance. Radiative widths were obtained for the E1 transitions to the ground ((5/$2^{+}$), 585-keV (1/$2^{+}$), 975-keV ((3/$2^{+}$), 1965-keV ((5/$2^{+}$), 2564-keV (1/$2^{+}$), and 2801-keV ((3/$2^{+}$) states, and were compared with theoretical calculations based on the valence capture model that was developed by Lane and Mughabghab. Consequently, we found that in the ${\mathit{p}}_{3/2}$-wave resonance capture the observed and calculated widths for the transitions to the 1/$2^{+}$ states are in excellent agreement; however, the experimental widths for the transitions to the (5/$2^{+}$ states are 20–50 % of the theoretical ones. These noteworthy features in the retardation of E1 transition are explained in terms of the renormalized effective charge, which depends on the orbital angular momentum for the single-particle component of final bound states, as a result of the coupling of the single-particle transition with the isovector field generated by the giant dipole resonance. Moreover, the nonadiabatic coupled-channel calculation using a particle-rotator coupling model was carried out for partial radiative widths of the 266-keV ${\mathit{p}}_{1/2}$-wave resonance. The calculations reproduced the observed values satisfactorily.

A three-boson model is applied to the nucleon-deuteron (n-d) system to construct an effective energy-dependent two-body potential in configuration space. The three-nucleon observables at low energy are well reproduced with just one free parameter (related with the range of the nucleon-nucleon interaction). We show that the present results give support to a previous phenomenological n-d potential.

The theory of deuteron Compton scattering developed previously [Phys. Rev. C 38, 611 (1988)] is reviewed and corrected in some minor points. Numerical results are presented and compared with other theoretical approaches. In particular, I now find reasonable agreement with a previous dispersion theoretical analysis of this process. I also get good agreement with low-energy parameters calculated elsewhere. I present predictions for angular distribution cross sections at a number of energies. These are of particular interest, since experiments at these energies are presently under way. I also investigate the influence of the spin-orbit correction to the current operator on the Compton amplitude.