An effective field theory (EFT) for a nuclear reaction at low energies is studied. The astrophysical $S$-factor of radiative $\alpha$ capture on $^{12}$C the Gamow-peak energy, $T_G=0.3$ MeV, fundamental quantity in nuclear-astrophysics, and we construct an EFT reaction. To fix parameters appearing Lagrangian, applied to study three reactions: elastic $\alpha$-$^{12}$C scattering energies, $E1$...

Nuclear level densities and spin cut-off factors have been deduced for nuclei in the mass region 24‹A‹63,from a microscopic theory, which includes nuclear pairing interaction. Single particle levels for both Seeger and Nilsson potentials were used in the calcdations. Level densities extracted from the theory are compared with their conesponding experimental values, It is found that the overall...

Abstract. The Maxwell-Boltzmannian approach to nuclear reaction rate theory is extended to cover Tsallis statistics (Tsallis, 1988) and more general cases of distribution functions. An analytical study of respective thermonuclear functions is being conducted with the help of statistical techniques. The pathway model, recently introduced by Mathai (2005), is utilized for thermonuclear functions ...

nuclear level densities and spin cut-off factors have been deduced for nuclei in the mass region 24‹a‹63,from a microscopic theory, which includes nuclear pairing interaction. single particle levels for both seeger and nilsson potentials were used in the calcdations. level densities extracted from the theory are compared with their conesponding experimental values, it is found that the overall ...

Recent progress to treat clustering in nuclear systems has an impact different branches of theory. Numerical methods as well many-body theory (Green-function methods) have been worked out describe few-body clusters a environment where medium effects, particular the antisymmetrization wave function (Pauli blocking) are relevance. Nuclear structure (Hoyle – like states), reactions, and consequenc...

In this talk we review the consequences of the chiral SU(3) symmetry for strangeness propagation in nuclear matter. Objects of crucial importance are the meson-baryon scattering amplitudes obtained within the chiral coupled-channel effective field theory. Results for antikaon and hyperonresonance spectral functions in cold nuclear matter are presented and discussed. The importance of the Σ(1385...

Overview A new era has dawned for nuclear structure and reaction theory. Renewed interest in the physics of nuclei is fueled by experiments at rare isotope beam facilities, which explore new regions of exotic nuclei; by astrophysical observations and simulations, which require controlled extrapolations of the nuclear equation of state; by the use of nuclei in experiments on fundamental symmetri...

Because the interaction is well-known, Coulomb excitation is one of the best tools for the investigation of nuclear properties. In the last 3 decades new reaction theories for Coulomb excitation have been developed such as: (a) relativistic Coulomb excitation, (b) Coulomb excitation at intermediate energies, and (c) multistep coupling in the continuum. These developments are timely with the adv...

The nuclear–electronic orbital (NEO) method is a multicomponent quantum chemistry theory that describes electronic and nuclear effects simultaneously while avoiding the Born–Oppenheimer approximation for certain nuclei. Typically specified hydrogen nuclei are treated mechanically at same level as electrons, NEO potential energy surface depends on classical coordinates. This approach includes su...