Zobrazeno 1 - 4
of 4
pro vyhledávání: '"E. Lipparini"'
Autor:
A. Richter, E. Lipparini
Publikováno v:
Physics Letters B. 144:13-18
Isoscalar and isovector magnetic dipole excitation modes are discussed within the frame of a two-state model using a spin- and spin-isospin-dependent effective separable interaction and the RPA. Simple expressions for excitation energies, gyromagneti
Publikováno v:
Nuclear Physics A
Nuclear Physics A, Elsevier, 1985, 438, pp.1-14
Nuclear Physics A, Elsevier, 1985, 438, pp.1-14
We study the transition strengths induced by the operators σ , σ · τ , l · τ and their combinations in the closed-shell nuclei 16 O and 40 Ca. The total, inverse energy-weighted and energy-weighted strengths are calculated in perturbation theor
Autor:
R. Leonardi, E. Lipparini
Publikováno v:
Physics Letters B. 47:385-388
Four simple, remarkably economical and as far as possible rigorous quadrupole sum rules for 4He are derived, discussed and compared with the available experimental results.
Publikováno v:
Physics Letters B. 64:21-23
Appropriate sum rules are shown to reproduce the results of microscopic calculations made in the random phase approximation for the soluble Hartree model with l -pole— l -pole interactions. This approach has the merit to avoid the problem of studyi