Coexistence effects in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Au</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>187</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>: Evidence for nearly identical diabatic intruder structures

Rupnik, D.; Zganjar, E. F.; Wood, J. L.; Semmes, P.B.; Nazarewicz, W.

doi:10.1103/physrevc.51.r2867

Cited by 12 publications

(9 citation statements)

References 3 publications

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“…The nuclear structure of the odd-mass Au isotopes is distinguished by three major features: it is the longest chain of odd-mass isotopes for which excited state information is now available; there are proton-hole states that exhibit near constant energies over a change in neutron number corresponding to some 30 mass units; and there are multiple coexisting intruder states (involving proton-particle excitations across the Z = 82 closed shell). This picture has emerged from studies of highspin states using in-beam γ-ray spectroscopy [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] and studies of low-spin and medium-spin states by β decay of Hg isotopes [19][20][21][22][23][24][25][26][27][28][29], atomic-beam magnetic resonance technique [30][31][32], in-source laser spectroscopy [33], α decay of Tl isotopes [34,35], and isomeric state decays in the Au isotopes [36,37]. Details of many of the intruder states have been given in reviews [38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Nuclear structure of $$^{181}$$Au studied via $$\upbeta ^+$$/EC decay of $$^{181}$$Hg at ISOLDE

et al. 2020

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The β + /EC decay of mass separated samples of 181 Hg was studied employing the TATRA spectrometer at the ISOLDE facility at CERN. The decay scheme was constructed for the first time. A Broad Energy Germanium detector was used to achieve this by combination of high-gain γ-ray singles spectroscopy and γ-γ coincidences. The systematics of excited states associated with the 1h 11/2 proton-hole configuration in odd-Au isotopes was extended.

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Section: Introductionmentioning

confidence: 99%

Nuclear structure of $$^{181}$$Au studied via $$\upbeta ^+$$/EC decay of $$^{181}$$Hg at ISOLDE

et al. 2020

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“…Recently, it has become evident that E0 transitions may exhibit widespread occurrence in odd-A nuclei (see, e.g., [123][124][125] ). The identification of E0 transitions in odd-mass nuclei is not new (see, e.g., 126 ) ; but it is not easy because coincidence gating of conversion electrons is needed to correctly locate the E0 transitions in the scheme.…”

Section: G Odd-a Nucleimentioning

confidence: 99%

Electric monopole transitions from low energy excitations in nuclei

Wood

Zganjar

Coster³

et al. 1999

Nuclear Physics A

231

223

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Electric monopole (E0) properties are studied across the entire nuclear mass surface. Besides an introductory discussion of various model results (shell model, geometric vibrational and rotational models, algebraic models), we point out that many of the largest E0 transition strengths, ρ 2 (E0), are associated with shape mixing. We discuss in detail the manifestation of E0 transitions and present extensive data for : single-closed shell nuclei, vibrational nuclei, well-deformed nuclei, nuclei that exhibit sudden ground-state changes, and nuclei that exhibit shape coexistence and intruder states. We also give attention to light nuclei, odd-A nuclei, and illustrate a suggested relation between ρ 2 (E0) and isotopic shifts.

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“…[22]). These bands have been interpreted as arising from an h 11/2 hole-like quasiproton excited from a near-oblate shaped vacuum, which shape-coexists with the near-prolate deformation for the h 9/2 band [32][33][34]. As discussed in Ref.…”

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Longitudinal Wobbling Motion in Au187

et al. 2020

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The rare phenomenon of nuclear wobbling motion has been investigated for the nucleus 187 Au. A longitudinal wobbling-bands pair has been identified and clearly distinguished from the associated signature-partner band on the basis of angular distribution measurements. Theoretical calculations in the framework of the Particle Rotor Model (PRM) are found to agree well with the experimental observations. This is the first experimental evidence for longitudinal wobbling bands where the expected signature partner band has also been identified, and establishes this exotic collective mode as a general phenomenon over the nuclear chart.Wobbling is a collective mode that may appear when the moments of inertia of all three principal axes of the nuclear density distribution are unequal. The mode is well known in classical mechanics and its occurrence is a clear signal for a triaxial nuclear shape. For a given angular momentum, uniform rotation about the axis with the largest moment of inertia corresponds to minimal energy. At a somewhat larger energy, this axis precesses (wobbles) about the space-fixed angular momentum axis. In a quantal system such as the nucleus (or a molecule), the mode manifests itself in the appearance of rotational bands that correspond to successive excitations of wobbling phonons, n ω , and alternating signature α = α 0 + n ω , which determines the spin sequence I = α + even number. Adjacent wobbling bands n ω+1 and n ω are connected by collectively-enhanced ∆I = 1 transitions of predominantly E2 character, which are generated by the wobbling motion of the entire charged body. This is in contrast with the signature-partner bands, which represent another type of excitation involving a partial dealignment of the odd particle with respect to its preferred axis; for those, the connecting ∆I = 1 transitions are of predominantly M1 character, with very little, if any, E2 admixtures.Although predicted quite sometime ago [1], this exotic nuclear motion has been observed only rarely in experiments so far, and the list of nuclei exhibiting it is quite short: 105 Pd [2], 135 Pr [3, 4] (and, possibly, 133 La [5]), 161 Lu [6], 163 Lu [7, 8], 165 Lu [9], 167 Lu [10] and 167 Ta [11]-a total of only 7(8) nuclei across the entire nuclear chart.All the aforementioned nuclei have an odd proton occu-pying a high-j orbital, which modifies the wobbling mode. Frauendorf and Dönau [12] classified this coupled mode as "longitudinal wobbling" (LW) and "transverse wobbling" (TW) when, respectively, the odd particle aligns its angular momentum along the medium axis (the axis with the largest moment of inertia), or along one of the perpendicular axes. The wobbling energy, E wobb [see Eq.(1) below], increases with increasing angular momentum for LW while it decreases for TW [12]. In all of the cases mentioned above (except, possibly, 133 La[5]), the wobbling bands have been identified as corresponding to TW because E wobb decreases with increasing angular momentum. We report on the observation of bands structures corresponding to...

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Coexistence effects inAu187: Evidence for nearly identical diabatic intruder structures

Cited by 12 publications

References 3 publications

Nuclear structure of $$^{181}$$Au studied via $$\upbeta ^+$$/EC decay of $$^{181}$$Hg at ISOLDE

Nuclear structure of $$^{181}$$Au studied via $$\upbeta ^+$$/EC decay of $$^{181}$$Hg at ISOLDE

Electric monopole transitions from low energy excitations in nuclei

Longitudinal Wobbling Motion in Au187

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