My recent research interests have been concentrated on nuclei far from stability (neutron and proton halos), nuclear astrophysics, the structure and reactions of light nuclei, and nuclear parity violation.

I have developed the first realistic microscopic models of the neutron- and proton halo nuclei He-6 and B-8, respectively. I produced the first (and still only) result for the beta-delayed deuteron emission from He-6 in a model, which treats the He-6 initial and alpha+d final states in a consistent way. I simultaneously reproduced the static properties of the Li-7, Be-7, Li-8, and B-8 nuclei, and confirmed in a realistic model that B-8 has a proton halo.

I have studied the Be-7(p,gamma)B-8 reaction, whose low-energy cross section determines the high-energy solar neutrino flux, in a microscopic eight-body model and in a potential model, respectively. The discovered correlation between the Be-7(p,gamma)B-8 astrophysical S factor and the Be-7 quadrupole moment in the eight-body model, and the connection between the Coulomb displacement energy and the potential well geometry in the potential model helped to give tighter constraints on the low-energy Be-7(p,gamma)B-8 cross section. I also studied the Li-7(p,gamma_0)Be-8 reaction and off-shell effects in Be-7(p,gamma)B-8 which have important consequences for the extrapolation of high-energy Be-7(p,gamma)B-8 experimental data.

I have developed methods to localize two- and three-body resonances in nuclei, and applied them to the A=3,4,5,6, and 12 nucleon systems. As an illustration, I mention one important result: I searched for alpha+N+N resonances in the A=6 nuclei and did not find any low-lying 1- state. Thus, in one of the most comprehensive models of that nucleus I showed that the much sought for soft dipole mode does not exist as a resonance in He-6.

I have studied the parity violating alpha-decay of the Li-6 0+ (3.56 MeV) state and the parity conserving gamma asymmetry in polarized cold neutron capture on proton. The former work established a theoretical decay width for the Li-6 state, while the latter one helped the planning of an experiment at LAMPF, which aims to measure the pionic weak coupling constant.

The developed methods and ideas shown above can be applied to a variety of interesting nuclear structure and reaction problems. Currently I am working on the He-3(He-3,alpha)pp and He-4(He-3,gamma)Be-7 reactions, wich play important roles in the solar energy- and neutrino-generation. I am also studying Li-11 in a three-body model. The aim is to explore the analytic structure of the homogeneous Faddeev kernel at complex energies, and thus learn about Li-11 resonances, and especially study the question of the soft dipole mode. I plan to apply the S matrix and R matrix approaches, that proved to be very fruitful for He-4, He-5, and Li-5, to other nuclear resonances.

In the future I plan to work mainly on nuclei far from stability and nuclear astrophysics. I also have an interest in solar modeling, neutrino physics, and self-organized systems.