Isovector part of optical potentials studied through analog transitions in the (p,n) reaction at 35 MeV

Jon, G. C.; Orihara, H.; Yun, C. C.; Terakawa, A.; Itoh, K.; Yamamoto, Akio; Suzuki, Hiroshi; Mizuno, Hiroshi; Kamurai, G.; Ishii, K.; Ohnuma, H.

doi:10.1103/physrevc.62.044609

Cited by 22 publications

(10 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2. It was verified that the coupling of additional levels changes calculated cross [30]. Therefore the sum given in such a way is 8.944 MeV, quite close to the empirical one.…”

Section: Coupled-channels Optical Model Analysissupporting

confidence: 70%

Dispersive coupled-channels optical-model potential with soft-rotator couplings for Cr, Fe, and Ni isotopes

Sun

Soukhovitskiĩ

et al. 2013

Phys. Rev. C

View full text Add to dashboard Cite

An approximate Lane-consistent dispersive coupled-channels optical potential is derived that describes nucleon-induced reactions on even iron isotopes. Realistic saturated couplings for 54,56,58 Fe nuclei are built using nuclear wave functions of the soft-rotator model with the Hamiltonian parameters adjusted to reproduce the energy of the low-lying collective levels of these isotopes. E2-and E3-transition probabilities between low-lying collective levels are well reproduced. The comprehensive experimental database used in the fitting process includes all scattering data for neutron and proton scattering up to 200 MeV on iron nuclei. The derived potential is shown to be applicable to Ni and Cr isotopes, assuming the applicability of the soft-rotator model to these nuclei and to the odd 57 Fe nucleus within the rigid-rotor model. The approximate Lane consistency of the derived potential is validated by describing the quasielastic (p, n) scattering with excitation of isobaric analog states. Elastic and inelastic analyzing powers for both neutron-and proton-induced reactions are shown to be in good agreement with experimental data, demonstrating the reliability of the derived dispersive spin-orbit potential.

show abstract

“…2. It was verified that the coupling of additional levels changes calculated cross [30]. Therefore the sum given in such a way is 8.944 MeV, quite close to the empirical one.…”

Section: Coupled-channels Optical Model Analysissupporting

confidence: 70%

Dispersive coupled-channels optical-model potential with soft-rotator couplings for Cr, Fe, and Ni isotopes

Sun

Soukhovitskiĩ

et al. 2013

Phys. Rev. C

View full text Add to dashboard Cite

show abstract

“…In the folding model, the effect of the Coulomb potential to the proton OP is taken into account self-consistently via the local relative motion momentum (15), and one needs only to use E = E p − ∆E C in the energy dependent factor g(E) of the real IS density dependence. The parameters of ImF IS (E, ρ) as well as those of both the real and imaginary parts of F IV (E, ρ) must be adjusted to the JLM results for the nucleon OP at the energy E = E p − ∆E C .…”

Section: Isospin-and Density Dependent Cdm3y6 Interactionmentioning

confidence: 99%

“…(1) has the same strength, but opposite signs for proton and neutron. Only in few cases the Lane potential U 1 has been deduced from the DWBA studies of the charge-exchange (p, n) scattering to the IAS [14,15].…”

Section: Introductionmentioning

confidence: 99%

Folding model study of the charge-exchange scattering to the isobaric analog state and implication for the nuclear symmetry energy

2014

View full text Add to dashboard Cite

The Fermi transition (∆L = ∆S = 0 and ∆T = 1) between the nuclear isobaric analog states (IAS), induced by the chargeexchange (p, n) or ( 3 He,t) reaction, can be considered as "elastic" scattering of proton or 3 He by the isovector term of the optical potential (OP) that flips the projectile isospin. The accurately measured (p, n) or ( 3 He,t) scattering cross-section to the IAS can be used, therefore, to probe the isospin dependence of the proton or 3 He optical potential. Within the folding model, the isovector part of the OP is determined exclusively by the neutron-proton difference in the nuclear densities and the isospin dependence of the effective nucleon-nucleon (NN) interaction. Because the isovector coupling explicitly links the isovector part of the proton or 3 He optical potential to the cross section of the charge-exchange (p, n) or ( 3 He,t) scattering to the IAS, the isospin dependence of the effective (in-medium) NN interaction can be well tested in the folding model analysis of these charge-exchange reactions. On the other hand, the same isospin-and density dependent NN interaction can also be used in a Hartree-Fock calculation of asymmetric nuclear matter, to estimate the nuclear matter energy and its asymmetry part (the nuclear symmetry energy). As a result, the fine-tuning of the isospin dependence of the effective NN interaction against the measured (p, n) or ( 3 He,t) cross sections should allow us to make some realistic prediction of the nuclear symmetry energy and its density dependence. a

show abstract

“…Because the high-precision (p,n) data are not available for a wide range of target masses and proton energies, the IV term of the nucleon OP has been deduced [10][11][12] mainly from the OM studies of the elastic proton and neutron scattering from the same target and energy, where the IV term of the OP (2) has the same strength, but opposite signs for proton and neutron. Only in a few cases has the Lane potential U 1 been deduced from the DWBA studies of (p,n) scattering to the IAS [13,14]. With the Coulomb correction properly taken into account [15], the phenomenological Lane potential has been shown to account quite well for the (p,n) scattering to the IAS.…”

Section: Introductionmentioning

confidence: 99%

Charge-exchange scattering to the isobaric analog state at medium energies as a probe of the neutron skin

2014

View full text Add to dashboard Cite

The charge-exchange ( 3 He,t) scattering to the isobaric analog state (IAS) of the target can be considered as "elastic" scattering of 3 He by the isovector term of the optical potential (OP) that flips the projectile isospin. Therefore, the accurately measured charge-exchange scattering cross section for the IAS can be a good probe of the isospin dependence of the OP, which is determined exclusively within the folding model by the difference between the neutron and proton densities and isospin dependence of the nucleon-nucleon interaction. Given the neutron skin of the target related directly to the same density difference, it can be well probed in the analysis of the charge-exchange ( 3 He,t) reactions at medium energies when the two-step processes can be neglected and the t-matrix interaction can be used in the folding calculation. For this purpose, the data of the ( 3 He,t) scattering to the IAS of 90 Zr and 208 Pb targets at E lab = 420 MeV have been analyzed in the distorted wave Born approximation using the double-folded charge-exchange form factor. The neutron skin deduced for these two nuclei turned out to be in a good agreement with the existing database.

show abstract

Isovector part of optical potentials studied through analog transitions in the (p,n) reaction at 35 MeV

Cited by 22 publications

References 11 publications

Dispersive coupled-channels optical-model potential with soft-rotator couplings for Cr, Fe, and Ni isotopes

Dispersive coupled-channels optical-model potential with soft-rotator couplings for Cr, Fe, and Ni isotopes

Folding model study of the charge-exchange scattering to the isobaric analog state and implication for the nuclear symmetry energy

Charge-exchange scattering to the isobaric analog state at medium energies as a probe of the neutron skin

Contact Info

Product

Resources

About