Prolate-oblate band mixing and new bands in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Hg</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>182</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>

Bindra, K.; Hua, P. F.; Babu, B. R. S.; Baktash, C.; Barreto, J.; Cullen, D. M.; Davids, C. N.; Deng, J. K.; Garrett, J. D.; Halbert, M. L.; Hamilton, J. H.; Johnson, N.R.; Kirov, A.; Kormicki, J.; Lee, I. Y.; C., W.; McGowan, F.K.; Ramayya, A. V.; Sarantites, D. G.; Soramel, F.; Winchell, D. F.

doi:10.1103/physrevc.51.401

Cited by 21 publications

(12 citation statements)

References 7 publications

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“…The level scheme as published in Ref. [22] was checked using the 90 • matrix, which is a combination of the γ γ matrices obtained using the data collected in the JUROGAM rings 4 (94 • ) and 5 (86 • ). A total of 5.1 × 10 5 γ γ coincidences were recorded.…”

Section: Resultsmentioning

confidence: 99%

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Lifetimes of odd-spin yrast states inHg182

Scheck¹,

Grahn²,

Petts³

et al. 2010

Phys. Rev. C

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Lifetimes of excited states in 182 Hg were extracted from recoil-gated γ -ray spectra and recoil-gated γ γ -coincidence matrices using the recoil distance Doppler-shift method. States were populated using the 96 Mo( 88 Sr,2n) 182 Hg fusion-evaporation reaction. Measured lifetimes allowed transition probabilities, transition quadrupole moments, quadrupole deformation parameters, and transition dipole moments to be deduced for the band formed by the odd-spin yrast states. The experimental results confirm the low degree of octupole collectivity in this mass region.

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Section: Resultsmentioning

confidence: 99%

“…182 Hg [22] and 184 Hg [23] did not propose candidates for an octupole excitation. A candidate in 186 Hg was found at 1228 keV [24], but a second study [25] assigned a spin and parity of J π = 4 + to this state.…”

Section: Introductionmentioning

confidence: 92%

Lifetimes of odd-spin yrast states inHg182

Scheck¹,

Grahn²,

Petts³

et al. 2010

Phys. Rev. C

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“…This recent information largely extends the early data (see refs. [131][132][133]). Except for mass A=184 (new results on E0 transitions from conversion electron and γ-ray studies [134]), no new results have been obtained since the most recent NDS evaluations, as cited before.…”

Section: The Experimental Data In the Even-even Hg Nucleimentioning

confidence: 99%

Nuclear shape coexistence: A study of the even-even Hg isotopes using the interacting boson model with configuration mixing

2014

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Background:The Po, Pb, Hg, and Pt region is known for the presence of coexisting structures that correspond to different particle-hole configurations in the shell model language or equivalently to nuclear shapes with different deformation. Purpose: We intend to study the configuration mixing phenomenon in the Hg isotopes and to understand how different observables are influenced by it. Method: We study in detail a long chain of mercury isotopes, Hg, using the interacting boson model with configuration mixing. The parameters of the Hamiltonians are fixed through a least-squares fit to the known energies and absolute B(E2) transition rates of states up to 3 MeV. Results: We obtained the IBM-CM Hamiltonians and we calculate excitation energies, B(E2)'s, quadrupole shape invariants, wave functions, isotopic shifts, and mean-field energy surfaces. Conclusions:We obtain a fairly good agreement with the experimental data for all the studied observables and we conclude that the Hamiltonian and the states we obtain constitute a good approximation to the Hg isotopes.

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“…The first direct evidence for configurations with different deformations came from isotope shift measurements, which revealed marked changes in the mean squared charge radii of the ground states of 183,185 Hg compared with those of other mercury isotopes [2]. The complex, irregular sequences of yrast transitions in the even-mass isotopes [176][177][178][179][180][181][182][183][184][185][186][187][188] Hg identified from in-beam γ -ray spectroscopy experiments were interpreted as the crossing of the band built upon the weakly deformed oblate ground state by another band having a larger prolate deformation with β 2 ∼ 0.25 [3][4][5][6][7][8][9][10][11]. Analysis of the systematics of excited states established that the deformed prolate structure reaches a minimum excitation energy in 182 Hg [12].…”

Section: Introductionmentioning

confidence: 99%

In-beam conversion-electron spectroscopy of180Hg

Page¹,

Andreyev²,

Wiseman³

et al. 2011

Phys. Rev. C

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Excited states in 180 Hg were populated using the 147 Sm( 36 Ar,3n) 180 Hg reaction and studied by in-beam conversion-electron spectroscopy. Conversion electrons emitted at the target position were measured using the Silicon Array for Conversion Electron Detection (SACRED) spectrometer and tagged through the characteristic α decays of 180 Hg detected in a position-sensitive silicon strip detector located at the focal plane of the gas-filled recoil separator Recoil Ion Transport Unit (RITU). Electron conversion of transitions previously assigned to 180 Hg through in-beam γ -ray spectroscopy studies was identified up to the 10 + → 8 + transition and the intensities of the conversion-electron transitions were found to be consistent with the previous multipolarity assignments. Evidence was also found for two highly converted transitions in 180 Hg: a 167 keV transition is interpreted as the transition from the newly identified 2 + 2 state at 601 keV to the 2 + 1 state at 434 keV, while a 420 keV transition is assigned as the E0 decay from the 0 + bandhead of the prolate-deformed configuration to the weakly deformed ground state.

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Prolate-oblate band mixing and new bands inHg182

Cited by 21 publications

References 7 publications

Lifetimes of odd-spin yrast states inHg182

Lifetimes of odd-spin yrast states inHg182

Nuclear shape coexistence: A study of the even-even Hg isotopes using the interacting boson model with configuration mixing

In-beam conversion-electron spectroscopy of180Hg

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