Calculating the nuclear mass in the very high angular momentum regime

Carlsson, B. G.; Ragnarsson, I.

doi:10.1103/physrevc.74.011302

Cited by 121 publications

(172 citation statements)

References 40 publications

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“…In addition, to help identify the characteristics of the experimentally observed bands in 159 Er, aligned angular momentum (or alignment) [40] as a function of rotational frequency and the excitation energy relative to that of a rotating liquid drop (based on the Lublin Strasbourg model [41,42]) as a function of spin, are plotted in Figs. 13, 15, 16, and 17.…”

Section: Discussionmentioning

confidence: 99%

“…In order to understand the behavior of 159 Er at the highest angular momenta observed, calculations have been performed using the unpaired cranked NilssonStrutinsky (CNS) model [42,49,50]. In this formalism, configurations are specified by the total number of particles in the open j-shells (or 'valence shells') contrary to the CSM formalism where only 'aligned particles' are listed.…”

Section: Strongly-coupled Structuresmentioning

confidence: 99%

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Diverse collective excitations in159Erup to high spin

Mustafa¹,

Ollier²,

Simpson³

et al. 2011

Phys. Rev. C

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A spectroscopic investigation of the γ decays from excited states in 159 Er has been performed in order to study the changing structural properties exhibited as ultrahigh spins (I > 60h) are approached. The nucleus 159 Er was populated by the reaction 116 Cd( 48 Ca,5nγ) at a beam energy of 215 MeV and the resulting γ decays were studied using the Gammasphere spectrometer. New rotational bands and extensions to existing sequences were observed, which are discussed in terms of the cranked shell model, revealing a diverse range of quasiparticle configurations. At spins around 50h there is evidence for a change from dominant prolate collective motion at the yrast line to oblate non-collective structures via the mechanism of band termination. A possible strongly deformed triaxial band occurs at these high spins, which indicates collectivity beyond 50h. The high spin data are interpreted within the framework of cranked Nilsson-Strutinsky calculations.

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Section: Discussionmentioning

confidence: 99%

Section: Strongly-coupled Structuresmentioning

confidence: 99%

Diverse collective excitations in159Erup to high spin

Mustafa¹,

Ollier²,

Simpson³

et al. 2011

Phys. Rev. C

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“…Within the framework of the CNS approach [17,[28][29][30][31], pairing is neglected. Therefore, the results are relevant mainly for high-spin excitations, but also in the intermediate-spin regime (I > 15) reasonable agreement with experimental results was obtained previously for other nuclei [32,33].…”

Section: Discussionmentioning

confidence: 99%

Collective and noncollective states in120Te

Nag¹,

Singh²,

Wilson³

et al. 2012

Phys. Rev. C

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High-spin states in 120 Te were populated in the reaction 80 Se( 48 Ca, α4n) 120 Te at a beam energy of 207 MeV and γ-ray coincidences were measured using the Gammasphere spectrometer. The previously known level scheme is extended to higher spin and new interband transitions and sidefeeding branches are established. Five highly-deformed rotational bands, extending up to almost I = 50, are observed for the first time. The bands are compared with similar structures found recently in neighboring nuclei. The experimental results are interpreted within the framework of the cranked Nilsson-Strutinsky model. Configuration assignments to several terminating states and to the high-spin bands are discussed.

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“…The experiment was performed at the ATLAS facility at Argonne National Laboratory where high-spin states in 134 Ce were populated in two separate experiments following the 116 Cd( 22 Ne,4n) reaction. In the first one, a 112-MeV beam of 22 Ne, provided by the ATLAS facility, bombarded a 1.48 mg/cm 2 -thick target foil of isotopically enriched 116 Cd, sandwiched between a 50 µg/cm 2 thick front layer of Al and a 150 µg/cm 2 Au backing. The second experiment used a similar beam and a target of the same enrichment and thickness evaporated onto a 55 µg/cm 2 -thick Au foil.…”

Section: Methodsmentioning

confidence: 99%

“…The observed bands are discussed within the framework of the cranked Nilsson-Strutinsky (CNS) model, as described in Refs. [20][21][22][23]. Configurations based on triaxially deformed minima are proposed for nearly all observed bands on the basis of the good agreement between experimental data and results of the CNS calculations.…”

Section: Introductionmentioning

confidence: 99%

Triaxiality and exotic rotations at high spins inCe134

et al. 2016

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High-spin states in 134 Ce have been investigated using the 116 Cd( 22 Ne,4n) reaction and the Gammasphere array. The level scheme has been extended to an excitation energy of ∼ 30 MeV and spin ∼ 54 . Two new dipole bands and four new sequences of quadrupole transitions were identified. Several new transitions have been added to a number of known bands. One of the strongly populated dipole bands was revised and placed differently in the level scheme, resolving a discrepancy between experiment and model calculations reported previously. Configurations are assigned to the observed bands based on Cranked Nilsson-Strutinsky calculations. A coherent understanding of the various excitations, both at low and high spins, is thus obtained supporting an interpretation in terms of coexistence of stable triaxial, highly deformed and superdeformed shapes up to very high spins. Rotations around different axes of the triaxial nucleus, and sudden changes of the rotation axis in specific configurations, are identified, further elucidating the nature of high-spin collective excitations in the A = 130 mass region.

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Calculating the nuclear mass in the very high angular momentum regime

Cited by 121 publications

References 40 publications

Diverse collective excitations in159Erup to high spin

Diverse collective excitations in159Erup to high spin

Collective and noncollective states in120Te

Triaxiality and exotic rotations at high spins inCe134

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