Lifetimes of high spin states in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Ir</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>181</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Os</mml:mi></mml:mrow><mml:mpres

Kaczarowski, R.; Garg, U.; Chaudhury, A.; Funk, E.G.; Mihelich, J.W.; Frekers, D.; Janssens, R. V. F.; Khoo, T. L.

doi:10.1103/physrevc.41.2069

Cited by 17 publications

(6 citation statements)

References 12 publications

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“…Considering our coincidence eKciency, we would have definitely observed p rays in coincidence with the 5069-keV n particles if the excitation energy were larger than 40 keV. This agrees with the most recent tentative assignment of (2 ) for the ground state of Ir, an assignment based on recent in-beam y-ray spectroscopy results [10,11]. The 2 assignment for the ground state is also supported by a recent preprint [12] dealing with the beta decay to siIr.…”

supporting

confidence: 89%

Identification ofPt185α activity and study ofAu
Bingham
¹
,
Kassim
²
,
Zhang
³

et al. 1991
Phys. Rev. C
5
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0
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supporting

confidence: 89%

Identification ofPt185α activity and study ofAu
Bingham
¹
,
Kassim
²
,
Zhang
³

et al. 1991
Phys. Rev. C
5
0
0
0
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“…176 Os [4,3] and 178 Os [4] represent good candidates for X(5) nuclei, whereas due to large error bars the structure of 180 Os is not completely clear. The data from [5] and [6] only hint for a X(5) structure. For 178,180 Pt the situation is even less clear.…”

Section: Discussionmentioning

confidence: 95%

“…Here we focus on the investigation of nuclei at and close by the critical point of the spherical to rotor shape phase transition. The symmetry at this critical point is called X (5) and was introduced by F. Iachello [1]. An analytic solution of the Bohr hamiltonian is possible with a simple approximation of the nuclear potential at the X(5) critical point with a square well potential for the deformation parameter β and a harmonic oscillator potential for γ [1].…”

Section: Introductionmentioning

confidence: 99%

“…Precise B(E2, I → I − 2) values are known for the lowest yrast states in 176,178 Os that allow to identify these nuclei as good X(5) candidates [3,4]. For neighboring 180 Os experimental errors of B(E2, I → I − 2) values are too large for a clear interpretation [5,6]. For 178,180 Pt the B(E2) values of the lowest yrast states do not allow an interpretation, either.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Measurement of absolute E2 transition strengths in [sup 176]W: Signatures for a rapid shape change

Fransen¹,

Dewald²,

Frießner³

et al. 2011

AIP Conference Proceedings

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The X(5) symmetry describes nuclei at the critical point of the shape phase transition from axially deformed rotor nuclei to spherical vibrators. 150 Nd, 152 Sm, and 154 Gd were the first nuclei where the predicted charateristics of the X(5) symmetry were observed. Later it was shown that also 176,178,180 Os can be successfully described with the X(5) symmetry.In the close vicinity of shape phase transitions one expects strongly changing nuclear shapes. In the X(5) region around A=150 this was observed for nuclei with different neutron numbers, whereas in the X(5) region around A=180 this is to be expected for different proton numbers. The aim of the work presented here is the confirmation of a rapid shape change for nuclei close to 178 Os. Besides the knowledge on the level scheme of the nuclei of interest, especially absolute E2 transition strengths are crucial for the interpretation of nuclear structure. Prolate deformation is expected for 176 W. Thus we performed a recoil distance Doppler shift (RDDS) measurement on 176 W to measure E2 transition strengths from level lifetimes. The experiment was performed at the Cologne FN TANDEM accelerator with the Cologne coincidence plunger with the reaction 169 Dy( 16 O,4n) 176 W and a beam energy of 80 MeV. We will present our experimental results and relate them to data on the neighboring nuclei 178 Os and 182 Pt. The results will be discussed in the framework of nuclear shape transitions in this mass region and compared to calculations with both the Interacting Boson Model (IBM) and the GCM.

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“…For the latter, deformation parameters have been deduced from the quadrupole moments measured for low-lying Irh9/2 states in some Ir and Os nuclei (e.g. lSllr [27]). In order to test this idea of a deformation induced delay of a rotational alignment, we have performed lifetime measurements on _g_Irand I87Au using the recoil distance method.…”

mentioning

confidence: 99%

Nuclear spectroscopic studies. Progress report

Bingham¹,

Guidry²,

Riedinger³

et al. 1994

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This report was preparedas an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or representsthat its use would not infringe privately owned rights. Reference herein to any specific commercial product, process,or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Governmentor any agency thereof.

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Lifetimes of high spin states inIr181andOs

Cited by 17 publications

References 12 publications

Identification ofPt185α activity and study ofAu
Bingham
¹
,
Kassim
²
,
Zhang
³

et al. 1991
Phys. Rev. C
5
0
0
0
View full text Add to dashboard Cite

Identification ofPt185α activity and study ofAu
Bingham
¹
,
Kassim
²
,
Zhang
³

et al. 1991
Phys. Rev. C
5
0
0
0
View full text Add to dashboard Cite

Measurement of absolute E2 transition strengths in [sup 176]W: Signatures for a rapid shape change

Nuclear spectroscopic studies. Progress report

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Lifetimes of high spin states inIr181andOs

Cited by 17 publications

References 12 publications

Identification ofPt185α activity and study ofAuBingham1, Kassim2, Zhang3 et al. 1991Phys. Rev. C5000View full textAdd to dashboardCite

Identification ofPt185α activity and study ofAuBingham1, Kassim2, Zhang3 et al. 1991Phys. Rev. C5000View full textAdd to dashboardCite

Measurement of absolute E2 transition strengths in [sup 176]W: Signatures for a rapid shape change

Nuclear spectroscopic studies. Progress report

Contact Info

Product

Resources

About

Identification ofPt185α activity and study ofAu
Bingham
¹
,
Kassim
²
,
Zhang
³

et al. 1991
Phys. Rev. C
5
0
0
0
View full text Add to dashboard Cite

Identification ofPt185α activity and study ofAu
Bingham
¹
,
Kassim
²
,
Zhang
³

et al. 1991
Phys. Rev. C
5
0
0
0
View full text Add to dashboard Cite