High-spin yrast structure of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi mathvariant="normal">Hg</mml:mi><mml:mprescripts /><mml:none /><mml:mn>204</mml:mn></mml:mmultiscripts></mml:mrow></mml:math>from the decay of a four-hole,<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mn>22</mml:mn><mml:mo>+</mml:mo></mml:msup></mml:math>isomer

Wrzesiński, J.; Lane, G. J.; Maier, K. H.; Janssens, R. V. F.; Dracoulis, George; Broda, R.; Byrne, A.P.; Carpenter, M. P.; Clark, R. M.; Cromaz, M.; Fornal, B.; Lauritsen, T.; Macchiavelli, A. O.; Rejmund, M.; Szpak, B.; Vetter, K.; Zhu, S.

doi:10.1103/physrevc.92.044327

Cited by 13 publications

(11 citation statements)

References 22 publications

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“…It has been demonstrated that experimental energy spectra of several nuclei in the vicinity of 208 Pb are systematically reproduced with the Kuo-Herling interaction and its modified version [63,[66][67][68][69][70][71][72][73]. Those agreements ensure the validity of the effective interaction and the ordering of the lowest two 1 2 − states.…”

Section: Discussionmentioning

confidence: 70%

Large-scale shell-model calculations of nuclear Schiff moments of $^{129}$Xe and $^{199}$Hg

Yanase,

Shimizu

2020

Preprint

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The theoretical uncertainty in the nuclear Schiff moment is an obstacle to set constraints on CP violation beyond the standard model from experimental upper bounds on atomic electric dipole moments. We perform large-scale shell-model calculations of the 129 Xe and 199 Hg nuclei with realistic effective interactions. The Schiff moments of 129 Xe and 199 Hg are reduced due to the configuration mixing by ∼ 10% from the evaluation of the independent particle model. On the other hand, the reduction is more significant in mean-field based calculations and shell-model calculations with a drastic truncation. In order to resolve the discrepancy in the Schiff moment of 199 Hg among several nuclear models, we survey low-energy nuclear structure. The large-scale shell-model calculations reveal that the Schiff moment of 199 Hg is considerably quenched in the second 1 2 − state.

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Section: Discussionmentioning

confidence: 70%

Large-scale shell-model calculations of nuclear Schiff moments of $^{129}$Xe and $^{199}$Hg

Yanase,

Shimizu

2020

Preprint

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“…The conversion coefficient of the 279-keV transition is measured to be 0.2261 (9) [27] and the theoretical value of the same for the 681-keV transition is 0.014 [22]. Using the measured γ -ray intensities, the summed total intensity of the 279-and 681-keV transitions is found to be 108 (5). This value has to be balanced with the summed total intensity of the 328-and 334-keV transitions, allowing for all physically reasonable combinations of multipolarities, along with the inclusion of constraints provided by the data.…”

Section: Resultsmentioning

confidence: 99%

“…This value has to be balanced with the summed total intensity of the 328-and 334-keV transitions, allowing for all physically reasonable combinations of multipolarities, along with the inclusion of constraints provided by the data. The inferred summed total intensity of the 328-and 334-keV transitions using their measured γ -ray intensities (Table I) and theoretical conversion coefficients are (a) 328 (E 1) and 334 (E 3): 107( 5); (b) 328 (M1) and 334 (E 3): 136 (7); and (c) 328 (E 2) and 334 (E 3): 114 (5). Other possible combinations, involving a different multipolarity for either of the two transitions, are quite unlikely based on the data.…”

Section: Resultsmentioning

confidence: 99%

“…The occurrence of metastable states in nuclei with proton or neutron numbers in the vicinity of shell closures is well established as arising from the presence of adjacent excited levels with a relatively large difference in angular momentum and small difference in energy. Isotopes of Hg (Z = 80) and Tl (Z = 81) with A ≈ 200, lying just below the doubly magic 208 Pb nucleus in the periodic chart, are therefore good candidates for the observation of metastable states or isomers [1][2][3][4][5]. The lighter isotopes of Tl (A < 200) are characterized by moderate oblate deformation on account of a significant number of valence neutrons leading to a small degree of collectivity [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Isomers in Tl203 and core excitations built on a five-nucleon-hole structure

et al. 2022

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“…The occurrence of metastable states in nuclei with proton or neutron numbers in the vicinity of shell closures is well established as arising from the presence of adjacent excited levels with a relatively large difference in angular momentum and small difference in energy. Isotopes of Hg (Z = 80) and Tl (Z = 81) with A ≈ 200, lying just below the doubly-magic 208 Pb nucleus in the periodic chart, are therefore good candidates for the observation of metastable states or isomers [1][2][3][4][5]. The proton-rich isotopes of Tl (A < 200) are characterized by moderate oblate deformation on account of a significant number of valence neutrons leading to a small degree of collectivity [6,7].…”

Section: Introductionmentioning

confidence: 99%

Isomers in 203Tl and core excitations built on a five-nucleon-hole structure

Bothe,

Tandel,

Wahid

et al. 2021

Preprint

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Isomers with three-and five-nucleon-hole configurations have been established in 203 Tl. These include newly identified levels with a three-nucleon structure: I π = (15/2 − ) with T 1/2 = 7.9(5) ns, and I π = (35/2 − ) with T 1/2 = 4.0(5) ns. In addition, five-quasiparticle states: I π = (39/2 − ) with T 1/2 = 1.9(2) ns, and I π = (49/2 + ) with T 1/2 = 3.4(4) ns have also been established. The previously determined long-lived decay [T 1/2 = 6.6(3) µs from this work] is associated with isomerism of the I π = (29/2 + ) state. Levels above this long-lived isomer have been identified through a delayed-prompt coincidence measurement. Five-nucleon-hole states with excitation energies Ex ≈ 7 MeV have been established as well as possible octupole excitations of the 208 Pb core built on these levels. The level scheme of 203 Tl is extended up to Ex ≈ 11 MeV with the inclusion of 25 new transitions. Empirical and shell-model calculations have been performed to aid in the description of the observed states which are found to be predominantly of intrinsic character.

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High-spin yrast structure ofHg204from the decay of a four-hole,22+isomer

Abstract: A high-spin isomer with τ > 700 ns has been found in 204

Cited by 13 publications

References 22 publications

Large-scale shell-model calculations of nuclear Schiff moments of $^{129}$Xe and $^{199}$Hg

Large-scale shell-model calculations of nuclear Schiff moments of $^{129}$Xe and $^{199}$Hg

Isomers in Tl203 and core excitations built on a five-nucleon-hole structure

Isomers in 203Tl and core excitations built on a five-nucleon-hole structure

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