132 research outputs found
Binding of eta_c meson with light nucleus
Binding energy of eta_c with ^4 He has been calculated on the basis of Yukawa
type potential. Final Rank Approximation (FRA) has been used for microscopical
treatment of the initial 5-body problem. The results are compared with the
results of the folding model and variational calculations.Comment: 5 pages, 1 figur
Fusion reactions in molecules via nuclear threshold resonances
It is widely accepted that in molecular systems the nuclear interaction plays
a negligible role, because of the strong Coulomb repulsion of the nuclei at
small distances. We are going to show that this is not always true. The
existence of an extended nuclear resonance may lead to considerably enhanced
nuclear reaction rates in appropriately prepared molecules. Especially we point
out that p+p+ ^{16}O, i.e., the constituents of water, can form a ^{18}Ne(1^-)
threshold resonance which decays under energy release into ^{17}F and a proton.Comment: RevTeX, 9.4 Kb; Published version of the pape
Comparison of triton bound state properties using different separable representations of realistic potentials
The quality of two different separable expansion methods ({\sl W} matrix and
Ernst-Shakin-Thaler) is investigated. We compare the triton binding energies
and components of the triton wave functions obtained in this way with the
results of a direct two-dimensional treatment. The Paris, Bonn {\sl A} and Bonn
{\sl B} potentials are employed as underlying two-body interactions, their
total angular momenta being incorporated up to . It is found that the
most accurate results based on the Ernst-Shakin-Thaler method agree within 1.5%
or better with the two-dimensional calculations, whereas the results for the
{\sl W}-matrix representation are less accurate.Comment: 27 pages, 6 postscript figures included, uses psfi
Binding Energies and Scattering Observables in the ^3He^4He_2 Atomic System
The ^3He^4He_2 three-atomic system is studied on the basis of a hard-core
version of the Faddeev differential equations. The binding energy of the
^3He^4He_2 trimer, scattering phase shifts, and the scattering length of a ^3He
atom off a ^4He dimer are calculated using the LM2M2 and TTY He-He interatomic
potentials.Comment: Contribution to Proceedings of the 17th International IUPAP
Conference on Few-Body Problems in Physics (Durham, North Carolina, USA, June
5-10, 2003
Microscopic description of -photoproduction on light nuclei
A microscopic four-body description of near-threshold coherent
photoproduction of the meson on the (3N)-nuclei is given. The
photoproduction cross-section is calculated using the Finite Rank Approximation
(FRA) of the nuclear Hamiltonian. The results indicate that the final state
interaction of the meson with the residual nucleus plays an important
role in the photoproduction process. Sensitivity of the results to the choice
of the T-matrix is investigated. The importance of obeying the
condition of unitarity is demonstrated.Comment: 4 pages, 4 figures; talk given at the International Conference on
Mesons and Light Nuclei '01, Prague, Czech Republic, July 2-6, 2001; to be
published in the Proceedings (AIP press
Ultracold scattering processes in three-atomic helium systems
We review results on scattering observables for He--He and
He--He collisions. We also study the effect of varying the coupling
constant of the atom-atom interaction on the scattering length
- …