Delayed neutron emission near the shell-closures

Borzov, I. N.

doi:10.1051/epjconf/201610706002

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…The most sensitive to underlying nuclear structure is the multi-neutron emission: 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) [6]. The microscopic study of the β-decay half-lives and the β-delayed neutronemission probabilities of the nuclei with high N/Z asymmetry makes it possible to reconstruct the β-decay strength function [6,7].…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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 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].…”

mentioning

confidence: 99%

“…The continuous part of the single-particle spectrum is discretized by diagonalizing the HF hamiltonian on a harmonic oscillator basis. The pairing correlations are generated by a zero-range force with a strength V 0 = −270 MeV fm 3 . This value of the pairing strength has been fitted to reproduce the odd-even mass difference in the studied region of nuclei [15,16].…”

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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The competition of tensor interaction and neutron-proton pairing in the beta-decay of the neutron-rich isotopes

et al. 2019

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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 126,128,130,132Cd 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 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 neutron-proton pairing in the β-decay characteristics of the neutron-rich Cd isotopes is discussed.

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Delayed neutron emission near the shell-closures

Cited by 4 publications

References 21 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

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

The competition of tensor interaction and neutron-proton pairing in the beta-decay of the neutron-rich isotopes

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