Electromagnetic properties of low-excitation states in 191Ir and 193Ir and supersymmetry schemes

Bezak, Eva; Stuchbery, A.E.; Bolotin, H.H.; Seale, W. A.; Kuyucak, Serdar; Isacker, P. Van

doi:10.1016/s0375-9474(99)00565-5

Cited by 21 publications

(21 citation statements)

References 59 publications

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“…The next step in this work should be to try to reproduce the next two bandheads in 193 Ir, a 7/2 − state at 299keV and a 3/2 + state at 460keV, both of which were not included in the present analysis and presented serious trouble in other calculations found in the literature [2][3][4][5][6][7].…”

Section: Discussionmentioning

confidence: 99%

“…The low-lying states in 193 Ir have been thoroughly studied and, although this nucleus is usually described as triaxiallydeformed [2][3][4][5], it has also been recently described as a prolate rotor [6]. Most of these theoretical studies describe rather well the binding energies of the 3/2 + ground state and the 1/2 + excited state at 73keV, but fail to describe the negativeparity bandheads; in this regard, the best effort to this date seems to be the one by Drissi [7], where a variation of the Interaction Boson-Fermion Model (IBFM) describes to some degree the 11/2 − isomeric state at 80keV and has the next bandhead, a 7/2 − state, quite shifted from its original 299keV excitation energy, but still below 1MeV.…”

Section: Introductionmentioning

confidence: 99%

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Low-energy levels calculation for 193Ir

Zahn¹,

Zamboni²,

Genezini³

et al. 2006

Braz. J. Phys.

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In this work, a model based on single particle plus pairing residual interaction was used to study the low-lying excited states of the 193 Ir nucleus. In this model, the deformation parameters in equilibrium were obtained by minimizing the total energy calculated by the Strutinsky prescription; the macroscopic contribution to the potential was taken from the Liquid Droplet Model, with the shell and paring corrections used as as microscopic contributions. The nuclear shape was described using the Cassinian ovoids as base figures; the single particle energy spectra and wave functions for protons and neutrons were calculated in a deformed Woods-Saxon potential, where the parameters for neutrons were obtained from the literature and the parameters for protons were adjusted in order to describe the main sequence of angular momentum and parity of the bandheads, as well as the proton binding energy of 193 Ir. The residual pairing interaction was calculated using the BCS prescription with Lipkin-Nogami approximation. The results obtained for the first three bandheads (the 3/2 + ground state, the 1/2 + excited state at E ≈ 73keV and the the 11/2 − isomeric state at E ≈ 80keV) showed a very good agreement, but the model so far greatly overestimated the energy of the next bandhead, a 7/2 − at E≈ 299keV.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low-energy levels calculation for 193Ir

Zahn¹,

Zamboni²,

Genezini³

et al. 2006

Braz. J. Phys.

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“…Gyromagnetic ratios of the 3/2 + 2 and 5/2 + 1 states at 444-and 463-keV excitation energy in 125 Te were measured simultaneously, relative to that of the 2 + 1 state in 126 Te, by the transient-field technique. Experimental procedures were similar to those in previous work [11][12][13][14].…”

Section: Introductionmentioning

confidence: 94%

Excited stategfactors inTe125

2009

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The transient-field technique has been used to measure, with considerably improved precision, the g factors of the 3/2 + and 5/2 + states in 125 Te at 444 and 463 keV, respectively, relative to the g factor of the first excited state in 126 Te. Together with shell model and weak-coupling core-excitation model calculations, the g-factor measurements provide insight into the orbital occupation of the odd neutron for the low-excitation states in 125 Te. A new 9/2 + level at 1029 keV, together with a firm 7/2 + spin assignment for the level at 1018 keV, identifies candidate states for the coupling of the s 1/2 neutron to the 4 + core excitation.

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“…[23, 24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43]. One caveat on this statement is that S(θ γ ) is a very sensitive function of θ γ when the detectors are placed near the maximum slope of the angular correlation as is done for precession measurements.…”

Section: Transient-field Impacmentioning

confidence: 99%

Apparatus for in-beam hyperfine interactions and g-factor measurements: Design and operation

Stuchbery

Harding

Weisser

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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The design and operation of apparatus for measurements of in-beam hyperfine interactions and nuclear excited-state g factors is described. This apparatus enables a magnetic field of about 0.1 tesla to be applied to the target and the target temperature to be set between ∼ 4 K and room temperature. Design concepts are developed mainly in terms of transient-field g-factor measurements following Coulomb excitation by the implantation perturbed angular correlation (IMPAC) technique. The formalism for perturbed angular correlations is outlined and a figure of merit for optimizing these measurements is derived to inform design. Particle detection is based on the use of silicon photodiodes of rectangular shape. The particle-γ angular correlation formalism for this case is described. The experimental program to date includes temperature-dependent studies of hyperfine fields, transient-field g-factor measurements, and time-dependent perturbed angular distribution (TDPAD) studies.

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Electromagnetic properties of low-excitation states in 191Ir and 193Ir and supersymmetry schemes

Cited by 21 publications

References 59 publications

Low-energy levels calculation for 193Ir

Low-energy levels calculation for 193Ir

Excited stategfactors inTe125

Apparatus for in-beam hyperfine interactions and g-factor measurements: Design and operation

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