Dipole response in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">Sn</mml:mi><mml:mprescripts /><mml:none /><mml:mn>132</mml:mn></mml:mmultiscripts></mml:math>within a self-consistent multiphonon approach

Knapp, F.; Iudice, N. Lo; Veselý, Petr; Andreozzi, F.; Gregorio, G. De; Porrino, A.

doi:10.1103/physrevc.90.014310

Cited by 36 publications

(51 citation statements)

References 63 publications

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“…The use of (Q)TDA instead of (Q)RPA does not imply any restriction. The two approaches yield almost identical dipole spectra in all chains of isotopes [20,22].…”

Section: Calculations and Resultsmentioning

confidence: 77%

“…So, we went beyond the mean field approximation and adopted the equation of motion phonon method (EMPM) [23][24][25] to study the dipole response within a space spanned by one plus two-phonon basis states [22]. The two phonons enhanced enormously the fragmentation of the dipole strength in both GDR and PDR regions, in better agreement with experiments.…”

Section: Introductionmentioning

confidence: 65%

“…[22,25] shows that V χ yields single-particle spectra considerably more compressed than V lowk . This compression is more consistent with experiments and improves the (Q)TDA and (Q)RPA descriptions of the dipole response.…”

Section: Calculations and Resultsmentioning

confidence: 99%

“…[21,22], while V ρ is a corrective repulsive, density dependent, two-body potential with a coupling constant C ρ . This force, introduced to simulate a three-body contact force [26], improves the description of bulk properties in closed-shell nuclei [27] and yields more realistic single-particle spectra and multipole-nuclear responses [19,20].…”

Section: Calculations and Resultsmentioning

confidence: 99%

“…This potential was adopted for 132 Sn in [22] and found to yield a much more compact single particle spectrum compared to V lowk and, consequently, to produce a dipole strength distribution much closer to the region of observation of the GDR peak. It was, nonetheless, still necessary to add the same density dependent term, though with a weaker strength, in order to reproduce the centroid of the resonance.…”

Section: Introductionmentioning

confidence: 99%

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Dipole response in neutron-rich nuclei within self-consistent approaches using realistic potentials

Iudice

Knapp

Veselý

et al. 2015

EPJ Web of Conferences

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Abstract.A nucleon-nucleon chiral potential with a corrective density dependent term simulating a three-body force is used in a self-consistent calculation of the dipole strength distribution in neutron-rich nuclei, with special attention to the low-lying spectra associated to the pygmy resonance. A Hartree-Fock-Bogoliubov basis is generated and adopted in Tamm-Dancoff and random-phase approximations and, then, in an equation of motion approach which includes a basis of two-phonon states. The direct use of the mentioned chiral potential improves the description of both giant and pygmy dipole modes with respect to other realistic interactions. Moreover, the inclusion of the two-phonon states induces a pronounced fragmentation of the giant resonance and enhances the density of the low-lying levels in the pygmy region in agreement with recent experiments.

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“…The use of (Q)TDA instead of (Q)RPA does not imply any restriction. The two approaches yield almost identical dipole spectra in all chains of isotopes [20,22].…”

Section: Calculations and Resultsmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 65%

Section: Calculations and Resultsmentioning

confidence: 99%