Excitation of ΔL = 1 resonances in the (p,n) reaction on 90Zr, 120Sn, 140Ce and 208Pb at Ep = 41 MeV

Nishihara, S.; Furukawa, K.; Kabasawa, M.; Nakagawa, T.; Orihara, H.; Maeda, K.; Miura, K.; Ohnuma, H.

doi:10.1016/0370-2693(85)90003-6

Cited by 12 publications

(10 citation statements)

References 16 publications

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“…However, from the consideration of relevant Clebsch-Gordan coefficients, the T 0 -1 component (AGDR) is favored compared to the T 0 and T 0 +1, by factors of T 0 and 2T 0 2 [498]. Experimental data on the AGDR have been extracted from (p, n) [499,473,500] and ( 3 He, t) reactions [393], because the observed ∆L = 1 resonance in general corresponds to the superposition of possible spin-flip dipole (IVSGDR) and non-spin-flip dipole (AGDR) modes. The nonspin-flip transition is preferred at low bombarding energies below 50 MeV [408].…”

Section: Anti-analogue Giant Dipole Resonancementioning

confidence: 99%

Nuclear equation of state from ground and collective excited state properties of nuclei

Roca-Maza

Paar

2018

Progress in Particle and Nuclear Physics

195

110

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This contribution reviews the present status on the available constraints to the nuclear equation of state (EoS) around saturation density from nuclear structure calculations on ground and collective excited state properties of atomic nuclei. It concentrates on predictions based on self-consistent mean-field calculations, which can be considered as an approximate realization of an exact energy density functional (EDF). EDFs are derived from effective interactions commonly fitted to nuclear masses, charge radii and, in many cases, also to pseudo-data such as nuclear matter properties. Although in a model dependent way, EDFs constitute nowadays a unique tool to reliably and consistently access bulk ground state and collective excited state properties of atomic nuclei along the nuclear chart as well as the EoS. For comparison, some emphasis is also given to the results obtained with the so called ab initio approaches that aim at describing the nuclear EoS based on interactions fitted to few-body data only. Bridging the existent gap between these two frameworks will be essential since it may allow to improve our understanding on the diverse phenomenology observed in nuclei. Examples on observations from astrophysical objects and processes sensitive to the nuclear EoS are also briefly discussed. As the main conclusion, the isospin dependence of the nuclear EoS around saturation density and, to a lesser extent, the nuclear matter incompressibility remain to be accurately determined. Experimental and theoretical efforts in finding and measuring observables specially sensitive to the EoS properties are of paramount importance, not only for low-energy nuclear physics but also for nuclear astrophysics applications. 7 The expression introduced by Migdal in Ref. [43] neglected the term in a AS . 8 From a macroscopic picture it would correspond to an isotropic compression. 9 From a macroscopic picture it would correspond to a non-isotropic compression. 15

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Section: Anti-analogue Giant Dipole Resonancementioning

confidence: 99%

Nuclear equation of state from ground and collective excited state properties of nuclei

Roca-Maza

Paar

2018

Progress in Particle and Nuclear Physics

195

110

View full text Add to dashboard Cite

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“…Nishihara et al [20] measured also the dipole strength distributions at E p = 41 MeV. It was shown experimentally [21,22] that the observed ∆L= 1 resonance was in general a superposition of all possible spin-flip dipole (IVSGDR) modes and the non-spin-flip dipole AGDR.…”

Section: Isovector Giant Resonances Excited By (Pn) Reactionsmentioning

confidence: 99%

Neutron-skin thickness of ²⁰⁸Pb from the energy of the anti-analogue giant dipole resonance

et al. 2013

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The energy of the charge-exchange Anti-analog Giant Dipole Resonance (AGDR) has been calculated for the 208 Pb isotope using the state-of-the-art fully self-consistent relativistic proton-neutron quasiparticle random-phase approximation based on the Relativistic HartreeBogoliubov model. It is shown that the AGDR centroid energy is very sensitively related to the corresponding neutron-skin thickness. The neutron-skin thickness of 208 Pb has been determined very precisely by comparing the theoretical results with the available experimental data on E(AGDR). The result ∆R pn = 0.161 ± 0.042 agrees nicely with the previous experimental results.

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“…Dipole resonances have also been studied systematically in (p,n) reactions at E p = 45 MeV by Sterrenburg et al [19], for 17 different targets from 92 Zr to 208 Pb. Nishihara et al [25] measured also the dipole strength distributions at E p = 41 MeV. It was shown [26,27] that the observed ∆L= 1 resonance in general corresponds to a superposition of all possible spinflip dipole (IVSGDR) and non-spin-flip dipole (AGDR) modes.…”

Section: Isovector Giant Resonances Excited By ( Pn) Reactionsmentioning

confidence: 99%

Anti-analog giant dipole resonances and the neutron skin of nuclei

et al. 2013

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We examine a method to determine the neutron-skin thickness of nuclei using data on the charge-exchange anti-analog giant dipole resonance (AGDR). Calculations performed using the relativistic proton-neutron quasiparticle random-phase approximation (RQRPA) reproduce the isotopic trend of the excitation energies of the AGDR, as well as that of the spin-flip giant dipole resonances (IVSGDR), in comparison to available data for the even-even isotopes 112-124Sn. It is shown that the excitation energies of the AGDR, obtained using a set of density-dependent effective interactions which span a range of the symmetry energy at saturation density, supplemented with the experimental values, provide a stringent constraint on the value of the neutron-skin thickness. For 124Sn, in particular, we determine the value DRpn=0.21(5) fm. The result of the present study shows that a measurement of the excitation energy of the AGDR in (p,n) reactions using rare-isotope beams in inverse kinematics, provides a valuable method for the determination of the neutron-skin thickness in exotic nuclei

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Excitation of ΔL = 1 resonances in the (p,n) reaction on 90Zr, 120Sn, 140Ce and 208Pb at Ep = 41 MeV

Cited by 12 publications

References 16 publications

Nuclear equation of state from ground and collective excited state properties of nuclei

Nuclear equation of state from ground and collective excited state properties of nuclei

Neutron-skin thickness of ²⁰⁸Pb from the energy of the anti-analogue giant dipole resonance

Anti-analog giant dipole resonances and the neutron skin of nuclei

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Excitation of ΔL = 1 resonances in the (p,n) reaction on 90Zr, 120Sn, 140Ce and 208Pb at Ep = 41 MeV

Cited by 12 publications

References 16 publications

Nuclear equation of state from ground and collective excited state properties of nuclei

Nuclear equation of state from ground and collective excited state properties of nuclei

Neutron-skin thickness of 208Pb from the energy of the anti-analogue giant dipole resonance

Anti-analog giant dipole resonances and the neutron skin of nuclei

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Product

Resources

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Neutron-skin thickness of ²⁰⁸Pb from the energy of the anti-analogue giant dipole resonance