Dispersive optical potential from an analysis of neutron single-particle energies in the Ti, Cr, and Fe isotopes featuring 20 to 50 neutrons

The spreading and escape widths of giant resonances are evaluated by considering damped particle and hole propagation in the nucleus. The magnitude and averaged A-dependence of the isoscalar quadrupole resonance widths are reproduced qualitatively when the nucleon optical potential, fit globally to low-energy scattering, is used to damp nucleon motion. Contributions from hole state widths and from vertex corrections increase and decrease the giant resonance widths, respectively. Qualitative agreement with experimental widths is shown for 16 O , 40 Ca and 208 Pb . Comparison with recent calculations within continuum RPA is made.

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Dispersive optical potential for nuclei with N and Z values changing toward the nucleon drip lines

Physics of Atomic Nuclei ◽

10.1134/s1063778814120047 ◽

2015 ◽

Vol 78 (1) ◽

pp. 118-127 ◽

Cited By ~ 9

Author(s):

O. V. Bespalova ◽

E. A. Romanovsky ◽

T. I. Spasskaya

Keyword(s):

Optical Potential ◽

Dispersive Optical Potential

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Extended Hartree-Fock study of the single-particle potential: The nuclear symmetry energy, nucleon effective mass, and folding model of the nucleon optical potential

Physical Review C ◽

10.1103/physrevc.92.034304 ◽

2015 ◽

Vol 92 (3) ◽

Cited By ~ 11

Author(s):

Doan Thi Loan ◽

Bui Minh Loc ◽

Dao T. Khoa

Keyword(s):

Effective Mass ◽

Symmetry Energy ◽

Single Particle ◽

Optical Potential ◽

Nuclear Symmetry Energy ◽

Folding Model ◽

Hartree Fock ◽

Particle Potential ◽

Single Particle Potential

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Single Particle Potential in Polarized Nuclear Matter

Canadian Journal of Physics ◽

10.1139/p74-235 ◽

1974 ◽

Vol 52 (18) ◽

pp. 1768-1799 ◽

Cited By ~ 45

Author(s):

J. Dabrowski ◽

P. Haensel

Keyword(s):

Nuclear Matter ◽

Single Particle ◽

Optical Potential ◽

Matrix Theory ◽

Nucleon Nucleon ◽

Spin Part ◽

Spin Polarized ◽

Particle Potential ◽

Single Particle Potential ◽

K Matrix

The problem of the single particle potential U in isospin and spin polarized nuclear matter, i.e. in nuclear matter with neutron excess and nonvanishing spin, is treated within the frame of the K matrix theory. General expressions for the isospin, spin, and spin–isospin parts of U, Uτ, Uσ, and Uστare obtained with the help of K matrices which depend on two Fermi momenta. The σ and στ parts have scalar and tensor components: Uσs and Uσt, and Uστ,s and Uστ,t These general expressions are specialized for nucleons at the Fermi surface. With suitable approximations, numerical values for Uτ(kF), Uσs(kF), and Uστ,s(kF) are obtained for the Brueckner–Gammel–Thaler and the Reid soft core nucleon–nucleon interactions. The tensor components, Uστ and Uστ,t, are estimated to be much smaller than the corresponding scalar components. The rearrangement effects turn out to be very important. At higher nucleon energies the τ, σ, and στ parts of U are calculated in the phase shift approximation with the Yale and Livermore phase shifts. The agreement of the calculated value of U, with experiment is satisfactory. The calculated values of Uσs and Uστ,s suggest that, in certain cases, a scalar spin–spin part of the optical potential is strong compared to other theoretical estimates, which seems to agree with some of the experimental results.

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