Pairing in exotic neutron-rich nuclei near the drip line and in the crust of neutron stars

Pastore, Alessandro; Margueron, J.; Schuck, Peter; Viñas, X.

doi:10.1103/physrevc.88.034314

Cited by 47 publications

(93 citation statements)

References 76 publications

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“…It has been found that they play an important role in the region of the drip line [8,9]. Virtual neutrons pairs can be scattered to the continuum.…”

Section: Introductionmentioning

confidence: 99%

Neutron drip line: Single-particle degrees of freedom and pairing properties as sources of theoretical uncertainties

et al. 2015

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The sources of theoretical uncertainties in the prediction of the two-neutron drip line are analyzed in the framework of covariant density functional theory. We concentrate on single-particle and pairing properties as potential sources of these uncertainties. The major source of these uncertainties can be traced back to the differences in the underlying single-particle structure of the various covariant energy density functionals (CEDF). It is found that the uncertainties in the description of single-particle energies at the two-neutron drip line are dominated by those existing already in known nuclei. Only approximately one third of these uncertainties are due to the uncertainties in the isovector channel of CEDF's. Thus, improving the CEDF description of single-particle energies in known nuclei will also reduce the uncertainties in the prediction of the position of two-neutron drip line. The predictions of pairing properties in neutron rich nuclei depend on the CEDF. Although pairing properties affect moderately the position of the two-neutron drip line they represent only a secondary source for the uncertainties in the definition of the position of the two-neutron drip line.

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“…It has been found that they play an important role in the region of the drip line [8,9]. Virtual neutrons pairs can be scattered to the continuum.…”

Section: Introductionmentioning

confidence: 99%

Neutron drip line: Single-particle degrees of freedom and pairing properties as sources of theoretical uncertainties

et al. 2015

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“…As already found in ref. [22], the differences between BCS and HFB are large in low density WS cells and they become more and more similar when the gas density increases and the WS cell tends toward a more homogeneous system.…”

Section: Discussionmentioning

confidence: 99%

Pairing properties of the inner crust of neutron stars at finite temperature

Pastore

2014

EPJ Web of Conferences

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Abstract.We investigate the thermal properties of the inner crust of a neutron star using the Hartree-Fock-Bogoliubov (HFB) formalism at finite temperature. We compare our results with the ones obtained solving the same equations, but within the BCS approximation. We observe that for the outermost regions of the inner crust, the two methods can show important differences, in particular when we use them to calculate the neutron specific heat of the system.

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“…More examples of occupation in the continuum can be seen in [27,28,49]. In [28] neutron rich nickel isotopes are studied, finding an occupation distribution for the swaves for 84 Ni similar to the V = −50 MeV case.…”

Section: Oxygen Isotopesmentioning

confidence: 99%

“…In [28] neutron rich nickel isotopes are studied, finding an occupation distribution for the swaves for 84 Ni similar to the V = −50 MeV case. In [27,49] mainly occupation for resonances is studied.…”

Section: Oxygen Isotopesmentioning

confidence: 99%

Continuum discretised BCS approach for weakly bound nuclei

Lay

Alonso

Fortunato

et al. 2016

J. Phys. G: Nucl. Part. Phys.

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Abstract.The Bardeen-Cooper-Schrieffer (BCS) formalism is extended by including the single-particle continuum in order to analyse the evolution of pairing in an isotopic chain from stability up to the drip line. We propose a continuum discretized generalized BCS based on single-particle pseudostates (PS). These PS are generated from the diagonalization of the single-particle Hamiltonian within a Transformed Harmonic Oscillator (THO) basis. The consistency of the results versus the size of the basis is studied. The method is applied to neutron rich Oxygen and Carbon isotopes and compared with similar previous works and available experimental data. We make use of the flexibility of the proposed model in order to study the evolution of the occupation of the low-energy continuum when the system becomes weakly bound. We find a larger influence of the non-resonant continuum as long as the Fermi level approaches zero.

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Pairing in exotic neutron-rich nuclei near the drip line and in the crust of neutron stars

Cited by 47 publications

References 76 publications

Neutron drip line: Single-particle degrees of freedom and pairing properties as sources of theoretical uncertainties

Neutron drip line: Single-particle degrees of freedom and pairing properties as sources of theoretical uncertainties

Pairing properties of the inner crust of neutron stars at finite temperature

Continuum discretised BCS approach for weakly bound nuclei

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