Spectroscopy of proton-rich 79Zr: Mirror energy differences in the highly-deformed fpg shell

Llewellyn, Ryan David Owen; Bentley, M. A.; Wadsworth, R.; Dobaczewski, J.; Satuła, W.; Iwasaki, H.; Angelis, G. de; Ash, John; Bazin, D.; Bender, P. C.; Cederwall, B.; Crider, B. P.; Doncel, M.; Elder, Robert; Elman, B.; Gade, A.; Grinder, M.; Haylett, T.; Jenkins, D. G.; Lee, I.Y.; Longfellow, B.; Lunderberg, E.; Mijatović, T.; Milne, S. A.; Rhodes, D.; Weißhaar, D.

doi:10.1016/j.physletb.2020.135873

Cited by 10 publications

(11 citation statements)

References 27 publications

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“…Similar increase (decrease) of theoretical MEDs due to the group 1 (group 3) particle-hole configurations and almost negligible effect due to pairing-like configurations of group 2 was also obtained in the calculations performed for the 79 Zr/ 79 Y mirror pair in Ref. [20].…”

Section: A Meds In the A=47 Mirror Pairsupporting

confidence: 81%

“…Moreover, it can be used to all N ≈ Z nuclei, in particular to A ≈ 80 mass region where the rotational bands are built on very elongated shapes what was demonstrated recently for the case of 79 Zr/ 79 Y mirror pair in Ref. [20]. It should be said, that applicability of conventional shell model to these nuclei is strongly limited due to large model spaces that must involve orbitals originating from p, f, g, d spherical sub-shells.…”

Section: Discussionmentioning

confidence: 81%

“…Recently, we have incorporated into the DFT-NCCI framework the CSB contact terms [19] and applied it to calculate the ISB corrections to the Fermi matrix elements in sd-shell T =1/2 mirror nuclei. In the subsequent work [20] we performed a seminal calculation of MEDs in the heaviest mirror pair measured so far 79 Zr/ 79 Y. The results obtained so far are very promising.…”

Section: Introductionmentioning

confidence: 97%

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Mirror energy differences in T=1/2f7/2 -shell nuclei within isospin-dependent density functional theory

Bączyk

Satuła

2021

Phys. Rev. C

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Background: Small asymmetry between neutrons and protons, caused by the differences in masses and charges of the up and down constituent quarks leads to the isospin symmetry breaking. The isospin non-conservation affects broad range of observables from superallowed Fermi weak interaction to isospin-forbidden electromagnetic rates. Its most profound and cleanest manifestation are systematic shifts in masses and excitation energies of mirror atomic nuclei.Purpose: Recently, we constructed the charge-dependent DFT that includes class II and III local interactions and demonstrated that the model allows for very accurate reproduction of Mirror and Triplet Displacement energies in a very broad range of masses. The aim of this work is to further test the charge-dependent functional by studying Mirror Energy Differences (MEDs) in function of angular momentum I.Methods: To compute MEDs we use DFT-rooted no core configuration interaction model. This post mean-field method restores rotational symmetry and takes into account configuration mixing within a space that includes relevant (multi)particle-(multi)hole Slater determinants.Results: We applied the model to f 7/2 -shell mirror pairs of A=43, 45, 47, and 49 focusing on MEDs in low-spin part (below band crossing) what allowed us to limit the model space to seniority one and three (one broken pair) configurations. Conclusions:We demonstrate that, for spins I ≤ 15/2 being subject of the present study, our model reproduces well experimental MEDs which vary strongly in function of I and A. The quality of model's predictions is comparable to the nuclear shell-model results by Bentley et al. Phys. Rev. C 92, 024310 (2015).

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Section: A Meds In the A=47 Mirror Pairsupporting

confidence: 81%

Section: Discussionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 97%

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Mirror energy differences in T=1/2f7/2 -shell nuclei within isospin-dependent density functional theory

Bączyk

Satuła

2021

Phys. Rev. C

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“…Naturally, the Coulomb force will break the degeneracy, although the underlying wave functions are expected to retain their isospin symmetry. A significant body of work has built up in recent years examining the difference in excitation energies between mirror pairs and complete T = 1 isobaric triplets -see, for example, references [12,[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38]. These studies, which have involved a shell-model interpretation, have shown that the electromagnetic effects within the shell-model cannot account alone for the energy differences, suggesting that other effective isospin-symmetry-breaking interactions are missing from the models -see [39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

In-beam $$\gamma $$-ray spectroscopy of $$^{94}$$Ag

et al. 2023

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A recoil-beta-tagging experiment has been performed to study the excited $$T=0$$ T = 0 and $$T=1$$ T = 1 states in the odd–odd $$N=Z$$ N = Z nucleus $$^{94}$$ 94 Ag, populated via the $$^{40}$$ 40 Ca($$^{58}$$ 58 Ni,1p3n)$$^{94}$$ 94 Ag reaction. The experiment was conducted using the MARA recoil separator and JUROGAM3 array at the Accelerator Laboratory of the University of Jyväskylä. Through correlating fast, high-energy beta decays at the MARA focal plane with prompt $$\gamma $$ γ rays emitted at the reaction target, a number of transitions between excited states in $$^{94}$$ 94 Ag have been identified. The timing characteristics of these transitions confirm that they fall within decay sequences that feed the short-lived $$T=1$$ T = 1 ground state of $$^{94}$$ 94 Ag. The transitions are proposed to proceed within and between the sets of states with $$T=0$$ T = 0 and $$T=1$$ T = 1 . Possible correspondence between some of these transitions from analog states in $$^{94}$$ 94 Pd has been discussed, and shell-model calculations including multipole and monopole electromagnetic effects have been presented, in order to enable predictions of the decay patterns between the $$T=0$$ T = 0 and $$T=1$$ T = 1 states and to allow a theoretical set of Coulomb energy differences to be calculated for the $$A = 94$$ A = 94 $$T=1$$ T = 1 analog states.

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“…It was found that there is a need of contributions from isospin mixing to reproduce the mirror energy data. Furthermore, it turned out that the DFT model is ideal for medium-mass nuclei because a reliable shell-model interpretation is not always feasible for these nuclei due to the large size of the required valence space [8].…”

mentioning

confidence: 99%

Probing isospin mixing with the giant dipole resonance in the Zn60 compound nucleus

Gosta¹,

Mentana²,

Camera³

et al. 2021

Phys. Rev. C

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Spectroscopy of proton-rich 79Zr: Mirror energy differences in the highly-deformed fpg shell

Cited by 10 publications

References 27 publications

Mirror energy differences in T=1/2f7/2 -shell nuclei within isospin-dependent density functional theory

Mirror energy differences in T=1/2f7/2 -shell nuclei within isospin-dependent density functional theory

In-beam $$\gamma $$-ray spectroscopy of $$^{94}$$Ag

Probing isospin mixing with the giant dipole resonance in the Zn60 compound nucleus

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