Multi-neutron emission of Cd isotopes

Severyukhin, A. P.; Arsenyev, N. N.; Borzov, I. N.; Sushenok, E. O.

doi:10.1103/physrevc.95.034314

Cited by 19 publications

(35 citation statements)

References 69 publications

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“…The method has been discussed in detail in Refs. [12,17], however, we recall it for completeness. The ground state properties of the even-even parent nucleus (N, Z) are described in the Hartree-Fock-BCS (HF-BCS) model, where spherical symmetry is imposed on the quasiparticle wave functions.…”

Section: Details Of Calculations and Resultsmentioning

confidence: 99%

“…As argued in Ref. [12], the study of multi-neutron emission following the β-decay of the neutron-rich nuclei would be more reliable if taking into account the phonon-phonon coupling (PPC). The finite rank separable approximation (FRSA) (see Refs.…”

Section: Introductionmentioning

confidence: 99%

“…[8]. Recently, the β-decay characteristics of Cd isotopes was described [12] within the microscopic model based on the Skyrme interaction with tensor components included [16]. The inclusion of the spin-isospin interaction in the particle-particle (pp) channel can further improve the model [17].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Tensor Interaction and Neutron--Proton Pairing on Beta-decay Characteristics of $^{130,132}$Cd

Sushenok¹,

Severyukhin²,

Arsenyev³

et al. 2019

Acta Phys. Pol. B

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The effects of the residual interaction in the particle-particle channel on β-decay characteristics and the multi-neutron emission probabilities in the β-decay of 130,132 Cd are studied within the quasiparticle random phase approximation with the Skyrme interaction. The coupling between oneand two-phonon terms in the wave functions of the low-energy 1 + states of the daughter nuclei is taken into account. It is shown that the inclusion of the spin-isospin interaction in the particle-particle channel leads to the reduction of half-lives and redistribution of one-and two-neutron emission probabilities. The competition of tensor interaction and neutronproton pairing contribution in β-decay characteristics of the neutron-rich Cd isotopes is discussed.

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Section: Details Of Calculations and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Tensor Interaction and Neutron--Proton Pairing on Beta-decay Characteristics of $^{130,132}$Cd

Sushenok¹,

Severyukhin²,

Arsenyev³

et al. 2019

Acta Phys. Pol. B

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“…[128,129,130,131,132,133], the quasiparticle-phonon model of Refs. [134,135,136,137], or the models based on the time-blocking approximation [138,139,140].…”

Section: Schematic Overview On a Selection Of Bmf Modelsmentioning

confidence: 99%

Effective density functionals beyond mean field

Grasso

2019

Progress in Particle and Nuclear Physics

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I present a review on non relativistic effective energy-density functionals (EDFs). An introductory part is dedicated to traditional phenomenological functionals employed for mean-field-type applications and to several extensions and implementations that have been suggested over the years to generalize such functionals, up to the most recent ideas. The heart of this review is then focused on density functionals designed for beyond-mean-field models. Examples of these studies are discussed. Starting from these investigations, some illustrations of ab-initio-based or ab-initio-inspired functionals are provided. Constructing functionals by building bridges with ab-initio models represents an extremely challenging and timely objective. This will eventually reduce/eliminate the empirical character of EDFs and link them with the underlying theory of QCD. Conclusions are presented in the last part of the review.

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“…As proposed in Ref. [10], the study of the multineutron emission, following the β-decay, requires taken into account the phonon-phonon coupling (PPC). The finite rank separable approximation (FRSA) [11][12][13] for the residual interaction allows one to perform the calculations in large configurational spaces.…”

mentioning

confidence: 99%

The impact of the tensor interaction on the β-delayed neutron emission of the neutron-rich Ni isotopes

et al. 2018

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Abstract. The neutron emission of the β-decay of 74,76,78,80 Ni are studied within the quasiparticle random phase approximation with the Skyrme interaction. The coupling between one-and two-phonon terms in the wave functions of the low-energy 1 + states of the daughter nuclei is taken into account. It is shown that the strength decrease of the neutronproton tensor interaction leads to the increase of the half-life and the neutron-emission probability.Study of the β-decay properties of the nuclei near the doubly magic isotope 78 Ni plays the crucial role in the modeling of the astrophysical r-process [1]. The multi-neutron emission is a multistep process consisting of the β-decay of the parent nucleus (N, Z) which results in feeding the excited states of the daughter nucleus (N -1, Z + 1) followed by the multi-neutron emissions to the ground state or γ-deexcitation to the ground state of the product nucleus (N -1 -X, Z + 1) [2]. The microscopic study of the β-decay half-lives and the β-delayed neutron-emission probabilities of the nuclei with high N/Z ratio asymmetry makes it possible to reconstruct the β-strength function [2,3]. Taking into account the tensor interaction has a substantial effect on the Gamow-Teller (GT) transitions within the β-decay window [4]. A redistribution of the GT strength has been found due to the impact of the tensor correlations and 2p-2h fragmentation of the GT transitions [5].One of the successful tools for studying charge-exchange nuclear modes is the quasiparticle random phase approximation (QRPA) with the self-consistent mean-field derived from a Skyrme energydensity functional (EDF), see e.g., [6][7][8][9]. These QRPA calculations enable one to describe the properties of the ground state and excited charge-exchange states using the same EDF. As proposed in Ref.[10], the study of the multineutron emission, following the β-decay, requires taken into account the phonon-phonon coupling (PPC). The finite rank separable approximation (FRSA) [11][12][13] for the residual interaction allows one to perform the calculations in large configurational spaces.In this paper, we investigate the impact of the tensor correlations on the probability of the neutron emission. As the parameter set in the particle-hole channel, we use the Skyrme EDFs TIJ [14], which take into account the tensor terms. Indices I and J refer to the proton-neutron (β) and like-particle (α) coupling constants that define the contribution to the spin-orbit potential from the J 2 terms:

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Multi-neutron emission of Cd isotopes

Cited by 19 publications

References 69 publications

Effects of Tensor Interaction and Neutron--Proton Pairing on Beta-decay Characteristics of $^{130,132}$Cd

Effects of Tensor Interaction and Neutron--Proton Pairing on Beta-decay Characteristics of $^{130,132}$Cd

Effective density functionals beyond mean field

The impact of the tensor interaction on the β-delayed neutron emission of the neutron-rich Ni isotopes

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