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Klotz, G.; Baumann, P.; Bounajma, M.; Huck, Alexander; Knipper, A.; Walter, G.; Marguier, G.; Richard‐Serre, C.; Poves, A.; Retamosa, J.

doi:10.1103/physrevc.47.2502

Cited by 89 publications

(90 citation statements)

References 29 publications

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“…Of interest is the location of the 4 + state to shed some light on the origin of the observed deformation. Azaiez et al [8] propose that this state is located at 2315(15) keV in agreement with a 2321 keV state previously observed in the β-decay of 32 Na [2]. Recently, a state in the vicinity of 2.31 MeV was also suggested in the two-proton knockout reaction of 34 Si, and assumed to be the 4 + state [9].…”

supporting

confidence: 65%

“…The evolution of the shell closures far from stability is, however, a subject of intense scrutiny. In particular, experimental studies have shown a breaking of magicity of the N = 20 [1][2][3] and the N = 28 [4,5] configurations for neutron-rich nuclei. Key nuclei in their respective regions, such as 32 Mg and 44 S, display large quadrupole collectivity arising from their prolate deformation.…”

mentioning

confidence: 99%

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β decay ofNa32

et al. 2007

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The β-decay of 32 Na has been studied using β-γ coincidences. New transitions and levels are tentatively placed in the level scheme of 32 Mg from an analysis of γ -γ and β-γ -γ coincidences. The structure of nuclei along the valley of stability is well understood in terms of the traditional magic numbers, corresponding to large gaps in single-particle energy levels of nucleons in realistic mean-field theories including a spin-orbit interaction. The evolution of the shell closures far from stability is, however, a subject of intense scrutiny. In particular, experimental studies have shown a breaking of magicity of the N = 20 [1][2][3] and the N = 28 [4,5] configurations for neutron-rich nuclei. Key nuclei in their respective regions, such as 32 Mg and 44 S, display large quadrupole collectivity arising from their prolate deformation. Over the years (and with the steady increase of computing power), shell model calculations have led to a better understanding of the magicity disappearance in certain regions of the nuclear chart (for a recent review, see Ref.[6] and references therein). In the case of the N = 20 shell closure, the so-called "island of inversion" around 32 Mg is due to low energy fp-intruder states competing with the standard sd-orbitals, giving rise to the deformed configurations.Despite many experimental studies, significant features of the 32 Mg level scheme are still unknown. In fact, only the first excited state at 885 keV is firmly assigned as a 2 + state [7]. The other excited states have, at best, only received a tentative assignment. Of interest is the location of the 4 + state to shed

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supporting

confidence: 65%

mentioning

confidence: 99%

β decay ofNa32

et al. 2007

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“…Most of these gamma rays have been seen in previous experiments [11,20,21]. The branching ratios and the energies of the gamma rays extracted from the current experiment agree well with these formerly established values.…”

Section: B Gamma-ray Transitionssupporting

confidence: 80%

“…The coincidence spectrum shown in Fig. 4 also depicts the established 453 keV coincident decay from the 673 keV state [21]. Including the new state at 2015 keV in the decay scheme, the γ -ray transitions observed in the current experiment are summarized in Fig.…”

Section: B Gamma-ray Transitionsmentioning

confidence: 95%

“…For the other excited states observed in the reaction, the AMD+GCM calculations [13] provides a useful insight into their nature together with previous experiments [11,20,21,29,30]. In particular, the neutron knockout experiment [11] populated the 3/2 − , 7/2 − states at 221 keV and 481 keV respectively labeled as 1p2h in the AMD+GCM calculation which agrees well with the removal of a fp-shell neutron from the 2p2h ground state of 32 Mg.…”

Section: B Structure Of Observed Excited Statesmentioning

confidence: 99%

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Intermediate energy proton knockout to the “island of inversion” isotopeMg31

et al. 2009

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The "island of the inversion" isotope 31 Mg was investigated using an intermediate energy proton knockout reaction from 32 Al at 90 MeV/nucleon at the National Superconducting Cyclotron Laboratory. A negligible cross section to the ground state supports an intruder-dominant configuration in 31 Mg. The partial cross sections to excited final states preferentially populate configurations in the 31 Mg residues which have no neutron excitations across the N = 20 shell closure. There is strong evidence that the reaction populates the 3/2 + and 5/2 + states which correspond with the neutron-hole states predicted by the shell model with the model space truncated above the sd-shell.

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Nuclear Moments

Neugart

Neyens

The Euroschool Lectures on Physics With Exotic Beams, Vol. II

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Beta decay ofNa31,32and

Cited by 89 publications

References 29 publications

β decay ofNa32

β decay ofNa32

Intermediate energy proton knockout to the “island of inversion” isotopeMg31

Nuclear Moments

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