O ct 1 99 9 A simple model for the microscopic effective pairing interaction
نویسنده
چکیده
The microscopic effective pairing interaction in the S0-channel is investigated for two different values of the chemical potential μ starting from the separable form of the Paris NN-potential. It is shown that, within a high accuracy, this effective interaction can be approximated by the off-shell free T -matrix taken at the negative energy E = 2μ.
منابع مشابه
v 1 2 7 O ct 1 99 9 Application of the extended P + QQ force model to N ≈ Z fp shell nuclei
To study collective motion, the extended pairing plus QQ force model proposed recently is applied to A=46, 48 and 50 nuclei in the f p shell region. Exact shell model calculations in the truncated model space (f 7/2 , p 3/2 , p 1/2) prove the usefulness of the interaction. The simple model with the pairing plus quadrupole pairing plus QQ force and J-independent isoscalar proton-neutron force re...
متن کاملFISSION FRAGMENT ANGULAR ANISOTROPIES AND INERTIA PARAMETERS
An analysis of selected fission fragment angular distributions from helium-ion induced fission is made using an exact theoretical expression. Theoretical anisotropies obtained with the transition state model are compared with their corresponding values deduced from the statistical scission model. The nuclear moment of inertia extracted from the model calculations are compared with their est...
متن کامل- th / 9 41 00 33 v 1 1 9 O ct 1 99 4 Correlations in a Many - Body Calculation of 11
A many-body calculation of Li is presented where the only input is the welltested, finite-range D1S effective interaction of Gogny. Pairing correlations are included in a constrained Hartree-Fock-Bogolyubov calculation, while long-range collective correlations are introduced using a GCM derived calculation. Correlations are found to play an important role in describing Li. A substantive underly...
متن کاملSTUDY OF NUCLEAR LEVEL DENSITY AND SPIN CUT-OFF FACTORS
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...
متن کاملth / 9 60 70 08 v 2 1 1 M ar 1 99 7 Suppression of core polarization in halo nuclei
We present a microscopic study of halo nuclei, starting from the Paris and Bonn potentials and employing a two-frequency shell model approach. It is found that the core-polarization effect is dramatically suppressed in such nu-clei. Consequently the effective interaction for halo nucleons is almost entirely given by the bare G-matrix alone, which presently can be evaluated with a high degree of...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1999