110 research outputs found
Inelastic scattering calculations with projected Hartree-Fock wave functions: Coupled channel treatment
Microscopic coupled-channel analysis of proton inelastic scattering from neon and magnesium ion
Quasideuteron states with deformed core
The M1 transitions between low-lying T=1 and T=0 states in deformed odd-odd
N=Z nuclei are analyzed in the frames of the rotor-plus-particle model. Using
the representation of an explicit coupling of angular momenta we show that
strong coupling of the quasideuteron configurations to the axially deformed
core results in a distribution of the total 0+ --> 1+ strength among a few
low-lying 1+ states. Simple analytical formulae for B(M1) values are derived.
The realization of the M1 sum rule for the low-lying 1+,T=0 states is
indicated. The calculated B(M1) values are found to be in good agreement with
experimental data and reveal specific features of collectivity in odd-odd N=Z
nuclei.Comment: 11 pages, 1 figure, LaTe
Di-neutron elastic transfer in the 4He(6He,6He)4He reaction
Elastic He+He data measured at 15.9, and 60.3
MeV have been analyzed within the coupled reaction channels (CRC) formalism,
with the elastic-scattering and two-neutron () transfer amplitudes
coherently included. Contributions from the direct (one-step) and sequential
(two-step) -transfers were treated explicitly based on a realistic
assumption for the -transfer form factor. The oscillatory pattern observed
in He(He,He)He angular distribution at low energies was found
to be due to an interference between the elastic scattering and -transfer
amplitudes. Our CRC analysis shows consistently that the direct -transfer
strongly dominates over the sequential transfer and thus confirms the dominance
of 2He configuration over the He one in the He wave function.
This result suggests a strong clusterization of the two valence neutrons and
allows, therefore, a reliable estimate for the \emph{di-neutron} spectroscopic
amplitude.Comment: Accepted for publication in Phys. Lett.
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ON THE SYSTEMATICS OF THE INTERFERENCE BETWEEN DIRECT AND INDIRECT MODES IN TWO-NUCLEON PICKUP AND STRIPPING REACTIONS BETWEEN HEAVY-IONS
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THE EFFECT OF INDIRECT TRANSITIONS ON TWO NUCLEON TRANSFER BETWEEN HEAVY IONS AND THEIR Q-DEPENDENCE
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QUANTUM MECHANICAL TREATMENT OF PARTICLE TRANSFER BETWEEN HEAVY IONS NEAR THE COULOMB BARRIER IN THE PRESENCE OF COULOMB EXCITATION
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