Gyromagnetic ratios of excited states and nuclear structure near 132Sn

Stuchbery, A.E.

doi:10.1063/1.4901764

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…The calculated B(M2) values depend on the choice of proton and neutron g factors. Calculations employing g l (π ) = 1.13, g s (π ) = 4.04, g l (ν) = 0.02, and g s (ν) = −2.65, taking into account core polarization and meson-exchange currents [74,75], change the B(M2; 23/2 + → 19/2 − ) values slightly to 1.679 × 10 −3 W.u (SN100PN), 0.693 × 10 −3 W.u (GCN50:82), and 1.771 × 10 −3 W.u (SN100-KTH) in 133 Xe and similar values of 2.559 × 10 −3 W.u (SN100PN), 4.029 × 10 −3 W.u (GCN50:82), and 2.406 × 10 −3 W.u (SN100-KTH) in 135 Ba.…”

Section: Discussionmentioning

confidence: 99%

Millisecond 23/2+ isomers in the N=79 isotones Xe133
Kaya¹,
Vogt²,
Reiter³
et al. 2018
Phys. Rev. C
5
0
7
0
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Detailed information on isomeric states in A ≈ 135 nuclei is exploited to benchmark shell-model calculations in the region northwest of doubly magic nucleus 132 Sn. The N = 79 isotones 133 Xe and 135 Ba are studied after multinucleon transfer in the 136 Xe + 208 Pb reaction employing the high-resolution Advanced GAmma Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA at the Laboratori Nazionali di Legnaro, Italy and in a pulsed-beam experiment at the FN tandem accelerator of the University of Cologne, Germany utilizing a 9 Be + 130 Te fusion-evaporation reaction at a beam energy of 40 MeV. Isomeric states are identified via delayed γ-ray spectroscopy. Hitherto tentative excitation energy, spin, and parity assignments of the 2107-keV J π = 23/2 + isomer in 133 Xe are confirmed and a half-life of T 1/2 = 8.64(13) ms is measured. The 2388-keV state in 135 Ba is identified as a J π = 23/2 + isomer with a half-life of 1.06(4) ms. The new results show a smooth onset of isomeric J π = 23/2 + states along the N = 79 isotones and close a gap in the high-spin systematics towards the recently investigated J π = 23/2 + isomer in 139 Nd. The resulting systematics of M2 reduced transition probabilities is discussed within the framework of the nuclear shell model. Latest large-scale shell-model calculations employing the SN100PN, GCN50:82, SN100-KTH, and a realistic effective interaction reproduce the experimental findings generally well and give insight into the structure of the isomers.

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Section: Discussionmentioning

confidence: 99%

Millisecond 23/2+ isomers in the N=79 isotones Xe133
Kaya¹,
Vogt²,
Reiter³
et al. 2018
Phys. Rev. C
5
0
7
0
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“…Table 7 shows the results of shell model calculations for the lowest five 2 + states in 132 Te. The calculations were performed with NUSHELLX [44] in the jj55 basis space and with the sn100 interactions; see Table 2 and [31,48,64,68] for additional details including the parameters of the effective M1 operator. Along with a comparison of the experimental and theoretical level energies, Table 7 lists the g factors and the decomposition of the wavefunctions into the dominant proton and neutron components coupled to 0 + and 2 + .…”

Section: Survival Of Seniority Structures Away From Closed Shellsmentioning

confidence: 99%

“…Figure 12. Shell model calculations of B(E2) and g factors in the N = 82 isotones with 50 < Z < 64.Reproduced from[31], with the permission of AIP Publishing.…”

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confidence: 99%

To Shell Model, or Not to Shell Model, That Is the Question

Stuchbery

Wood

2022

Physics

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The present review takes steps from the domain of the shell model into open shell nuclei. The question posed in the title is to dramatize how far shell model approaches, i.e., many nucleons occupying independent-particle configurations and interacting through two-body forces (a configuration interaction problem) can provide a description of nuclei as one explores the structure observed where neither proton nor neutron numbers match closed shells. Features of doubly closed and singly closed shell nuclei and adjacent nuclei are sketched, together with the roles played by seniority, shape coexistence, triaxial shapes and particle–core coupling in organizing data. An illuminating step is taken here to provide a detailed study the reduced transition rates, B(E2;21+→01+), in the singly closed shell nuclei with doubly closed shell plus or minus a pair of identical nucleons, and the confrontation between such data and state-of-the-art shell model calculations: this amounts to a review of the effective charge problem. The results raise many questions and point to the need for much further work. Some guidance on criteria for sharpening the division between the domain of the shell model and that of deformation-based descriptions of nuclei are provided. The paper is closed with a sketch of a promising direction in terms of the algebraic structure embodied in the symplectic shell model.

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Magnetic moments of thallium isotopes in the vicinity of magic N = 126

Yue,

Andreyev,

Barzakh

et al. 2024

Physics Letters B

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Gyromagnetic ratios of excited states and nuclear structure near 132Sn

Cited by 5 publications

References 19 publications

Millisecond 23/2+ isomers in the N=79 isotones Xe133
Kaya¹,
Vogt²,
Reiter³
et al. 2018
Phys. Rev. C
5
0
7
0
View full text Add to dashboard Cite

Millisecond 23/2+ isomers in the N=79 isotones Xe133
Kaya¹,
Vogt²,
Reiter³
et al. 2018
Phys. Rev. C
5
0
7
0
View full text Add to dashboard Cite

To Shell Model, or Not to Shell Model, That Is the Question

Magnetic moments of thallium isotopes in the vicinity of magic N = 126

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Gyromagnetic ratios of excited states and nuclear structure near 132Sn

Cited by 5 publications

References 19 publications

Millisecond 23/2+ isomers in the N=79 isotones Xe133Kaya1, Vogt2, Reiter3 et al. 2018Phys. Rev. C5070View full textAdd to dashboardCite

Millisecond 23/2+ isomers in the N=79 isotones Xe133Kaya1, Vogt2, Reiter3 et al. 2018Phys. Rev. C5070View full textAdd to dashboardCite

To Shell Model, or Not to Shell Model, That Is the Question

Magnetic moments of thallium isotopes in the vicinity of magic N = 126

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Millisecond 23/2+ isomers in the N=79 isotones Xe133
Kaya¹,
Vogt²,
Reiter³
et al. 2018
Phys. Rev. C
5
0
7
0
View full text Add to dashboard Cite

Millisecond 23/2+ isomers in the N=79 isotones Xe133
Kaya¹,
Vogt²,
Reiter³
et al. 2018
Phys. Rev. C
5
0
7
0
View full text Add to dashboard Cite

Magnetic moments of thallium isotopes in the vicinity of magic N = 126