Northern boundary of the “island of inversion” and triaxiality in 34 Si

Han, R.; Li, X.Q.; Jiang, W. G.; Li, Z.H.; Hua, H.; Zhang, S.Q.; Yuan, Cenxi; Jiang, D. X.; Ye, Y.L.; Li, J.; Fang, Xu; Chen, Q.B.; Meng, J.; Wang, J.S.; Xu, Cheng; Sun, Y.; Wang, C.G.; Wu, H. Y.; Niu, C. Y.; Li, C.G.; He, Chu; Li, P.J.; Zang, H. L.; Feng, Jinhui; Chen, S.D.; Liu, Q.; Chen, X.C.; Xu, H. S.; Hu, Z. G.; Yang, Y. Y.; Ma, P.; Ma, J.B.; Jin, S.; Bai, Zhiyong; Huang, Mei‐Rong; Zhou, Yuanjing; Ma, Weizhe; Li, Y.; Zhou, X. H.; Zhang, Y.H.; Xiao, Guoqing; Wang, Zhan

doi:10.1016/j.physletb.2017.07.007

Cited by 24 publications

(26 citation statements)

References 53 publications

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“…The present paper concludes that (1) the present experimental and theoretical results do not support the presence of triaxially deformed structures in 34 Si, being consistent with two estimates, based on different theory approaches, which point to a pronounced γ-softness, in line with the potential energy surface (PES) calculations discussed in Ref. [20]; (2) more precise Coulomb excitation measurements are required in order to lower the uncertainty for the known B(E2) values and to determine the ones corresponding to the newly identified 2 + states in 34 Si.…”

Section: Discussionsupporting

confidence: 78%

“…The discrepancy between the calculated and experimental lower limit of B r (1193/1800) suggests that the claim of triaxiality made in Ref. [20] has uncertain experimental grounds. (Color Online) Background-subtracted, β-gated γ-ray spectra in coincidence with the 2957 ((0 + ) → (2 + )) or 2588-keV (→ (2 + )) γ rays feeding the (2 + ) 4518 keV level in 34 Si obtained from the decay of 34 Mg.…”

Section: F Triaxiality In 34 Si?mentioning

confidence: 84%

“…6 of Ref. [20] that amount to 110 for the mean field calculations using the Gogny interaction and 260 for the shell model using the SDPF-M interaction. Assuming pure E2 transitions, and using the experimental energies of the 1193 and 1800-keV transitions, branching ratios of B r (1193/1800)= I γ (E2; 2 + 2 → 2 + 1 )/I γ (E2; 2 + 2 → 0 + 2 ) = 14 (Gogny) and 33 (SDPF-M) are found.…”

Section: F Triaxiality In 34 Si?mentioning

confidence: 99%

“…high 2 + energy [12], low B(E2; 2 + 1 → 0 + 1 ) value [18], drop in S n value after N = 20), but lies at the verge of the 'Island of Inversion', where nuclei are deformed in their ground state configuration. It follows that deformed configurations, shape coexistence [19] and possibly triaxial shapes are present already among the few first excited states in 34 Si [20]. The abrupt transition from the closedshell ground-state of 34 Si to the intruder-dominated deformed ground state of 32 Mg [21], while removing only two protons in the 1d 5/2 orbit, is a challenge for nuclear models [22,23].…”

mentioning

confidence: 99%

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Normal and intruder configurations in Si34 populated in the β− decay of Mg34
Lică¹,
Rotaru²,
Borge³
et al. 2019
Phys. Rev. C
13
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7
0
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The structure of 34 Si was studied through γ spectroscopy separately in the β − decays of 34 Mg and 34 Al at the ISOLDE facility of CERN. Different configurations in 34 Si were populated independently from the two recently identified β-decaying states in 34 Al having spin-parity assignments J π = 4 − dominated by the normal configuration π(d 5/2 ) −1 ⊗ ν(f 7/2 ) and J π = 1 + by the intruder configuration π(d 5/2 ) −1 ⊗ ν(d 3/2 ) −1 (f 7/2 ) 2 . The paper reports on spectroscopic properties of 34 Si such as an extended level scheme, spin and parity assignments based on log(f t) values and γ-ray branching ratios, absolute β feeding intensities and neutron emission probabilities. A total of 11 newly identified levels and 26 transitions were added to the previously known level scheme of 34 Si. Large scale shell-model calculations using the sdpf-u-mix interaction, able to treat higher order intruder configurations, are compared with the new results and conclusions are drawn concerning the predictive power of sdpf-u-mix, the N = 20 shell gap, the level of mixing between normal and intruder configurations for the 0 + 1 , 0 + 2 and 2 + 1 states and the absence of triaxial deformation in 34 Si.

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Section: Discussionsupporting

confidence: 78%

Section: F Triaxiality In 34 Si?mentioning

confidence: 84%

Section: F Triaxiality In 34 Si?mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Normal and intruder configurations in Si34 populated in the β− decay of Mg34
Lică¹,
Rotaru²,
Borge³
et al. 2019
Phys. Rev. C
13
1
7
0
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“…The spurious center-of-mass excitation has been treated using the Lawson method [26] that has been described above. Our β-decay calculations for the sd-pf region can be found in the recent experimental paper [41]. [27].…”

Section: Center-of-mass Correctionmentioning

confidence: 99%

Gogny-force-derived effective shell-model Hamiltonian

Jiang

Sun

et al. 2018

Phys. Rev. C

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The density-dependent finite-range Gogny force has been used to derive the effective Hamiltonian for the shell-model calculations of nuclei. The density dependence simulates an equivalent three-body force, while the finite range gives a Gaussian distribution of the interaction in the momentum space and hence leads to an automatic smooth decoupling between low-momentum and high-momentum components of the interaction, which is important for finite-space shell-model calculations. Two-body interaction matrix elements, single-particle energies and the core energy of the shell model can be determined by the unified Gogny force. The analytical form of the Gogny force is advantageous to treat cross-shell cases, while it is difficult to determine the cross-shell matrix elements and single-particle energies using an empirical Hamiltonian by fitting experimental data with a large number of matrix elements. In this paper, we have applied the Gogny-force effective shell-model Hamiltonian to the p-and sd-shell nuclei. The results show good agreements with experimental data and other calculations using empirical Hamiltonians. The experimentallyknown neutron drip line of oxygen isotopes and the ground states of typical nuclei 10 B and 18 N can be reproduced, in which the role of three-body force is non-negligible. The Gogny-force derived effective Hamiltonian has also been applied to the cross-shell calculations of the sd-pf shell.

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Introduction

MacGregor

2022

Springer Theses

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Northern boundary of the “island of inversion” and triaxiality in 34 Si

Cited by 24 publications

References 53 publications

Normal and intruder configurations in Si34 populated in the β− decay of Mg34
Lică¹,
Rotaru²,
Borge³
et al. 2019
Phys. Rev. C
13
1
7
0
View full text Add to dashboard Cite

Normal and intruder configurations in Si34 populated in the β− decay of Mg34
Lică¹,
Rotaru²,
Borge³
et al. 2019
Phys. Rev. C
13
1
7
0
View full text Add to dashboard Cite

Gogny-force-derived effective shell-model Hamiltonian

Introduction

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Northern boundary of the “island of inversion” and triaxiality in 34 Si

Cited by 24 publications

References 53 publications

Normal and intruder configurations in Si34 populated in the β− decay of Mg34Lică1, Rotaru2, Borge3 et al. 2019Phys. Rev. C13170View full textAdd to dashboardCite

Normal and intruder configurations in Si34 populated in the β− decay of Mg34Lică1, Rotaru2, Borge3 et al. 2019Phys. Rev. C13170View full textAdd to dashboardCite

Gogny-force-derived effective shell-model Hamiltonian

Introduction

Contact Info

Product

Resources

About

Normal and intruder configurations in Si34 populated in the β− decay of Mg34
Lică¹,
Rotaru²,
Borge³
et al. 2019
Phys. Rev. C
13
1
7
0
View full text Add to dashboard Cite

Normal and intruder configurations in Si34 populated in the β− decay of Mg34
Lică¹,
Rotaru²,
Borge³
et al. 2019
Phys. Rev. C
13
1
7
0
View full text Add to dashboard Cite