Development of collective structures over noncollective excitations in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>139</mml:mn></mml:msup></mml:math>Nd

Bhowal, S.; Gangopadhyay, G.; Petrache, C. M.; Ragnarsson, I.; Singh, A. K.; Bhattacharya, Sutanu; Huebel, H.; Neußer-Neffgen, A.; Al-Khatib, A.; Bringel, P.; Buerger, A.; Nenoff, N.; Schoenwasser, G.; Hagemann, G.B.; Herskind, B.; Jensen, David R.; Sletten, G.; Fallon, P.; Goergen, A.; Bednarczyk, P.; Curien, D.; Korichi, A.; Лопез-Мартенс, А.; Rao, B. V. Thirumala; Reddy, T. Seshi; Singh, Nirmal

doi:10.1103/physrevc.84.024313

Cited by 16 publications

(23 citation statements)

References 27 publications

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“…These exotic types of motion were observed in specific regions of the nuclear chart: the wobbling motion in the odd-even Lu nuclei with A ∼ 160 [6], the chirality primarly in the odd-odd and odd-even nuclei with A ∼ 130 nuclei [4,7,8]. In the nuclei 136−140 Nd, surrounding the subject of the present paper, the rotational bands at medium and high spins have been successfully interpreted with model calculations based on triaxial shapes [9][10][11][12][13]. In the same mass region nearly degenerate bands with the same spin and parity have been observed, which were interpreted as chiral partners (for example 134 Pr and 135 Nd [4,7,8]).…”

Section: Introductionmentioning

confidence: 75%

“…• , which is a typical value for this mass region [9][10][11][12][13]. The TAC model considers the rotation about an axis that is tilted by the angles θ and φ from the principal axes.…”

Section: A Framework For the Csm And Tac Calculationsmentioning

confidence: 99%

“…Refs. [11][12][13] proposed stable triaxiality at high-spin in 138,139,140 Nd. A highly-deformed band in 138 Nd and a superdeformed (SD) band in 140 Nd were suggested in Refs.…”

Section: Introductionmentioning

confidence: 99%

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Tilted axis rotation, candidates for chiral bands, and wobbling motion in138Nd

et al. 2012

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High-spin states in138 Nd were investigated using the reaction 94 Zr( 48 Ca,4n), detecting coincident γ-rays with the gasp spectrometer. A rich level scheme was constructed including 4 bands of negative parity at low spins, 8 bands of dipole transitions and 8 bands of quadrupole transitions at medium spins. The Cranked Shell Model and the Tilted Axis Cranking model are used to assign configurations to the observed bands, where zero pairing is assumed. For selected configurations the case of finite pairing is also considered. A consistent notation for configuration assignment is introduced, which applies both for zero and finite pairing. The observed bands are interpreted as rotation around the short and long principal axes (quadrupole bands), as well as around a tilted axis (dipole bands). The dipole bands have an intermediate character, between magnetic and collective electric rotation. A pair of dipole bands are candidates for chiral partners, the first case this property has been identified in an even-even nucleus. The possible existence of the wobbling mode at low deformation and medium spins is discussed. The consistent interpretation of the multitude of observed bands strongly supports the existence of stable triaxial deformation at medium spins in 138 Nd.

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Section: Introductionmentioning

confidence: 75%

“…• , which is a typical value for this mass region [9][10][11][12][13]. The TAC model considers the rotation about an axis that is tilted by the angles θ and φ from the principal axes.…”

Section: A Framework For the Csm And Tac Calculationsmentioning

confidence: 99%

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Tilted axis rotation, candidates for chiral bands, and wobbling motion in138Nd

et al. 2012

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“…Another region of nuclei with stable triaxial shapes at high spins is the Nd region of nuclei with few holes in the N = 82 shell closure, in which many bands have been observed recently [15][16][17][18][19]. In contrast to the Er-Lu-Hf nuclei, which are well deformed and most of the observed structures are rotational bands built on a triaxial shape, the Nd nuclei present a variety of shapes which coexist at high spins: multiple triaxial bands were observed in 138,139,140 Nd [15][16][17][18][19], spherical isomeric states were observed in 139,140 Nd [20,21], a highly deformed band was observed in 138 Nd [22], a superdeformed (SD) band was observed in 140 Nd [23].…”

Section: Introductionmentioning

confidence: 97%

Multiple triaxial bands inNd138

Petrache

Ragnarsson

et al. 2015

Phys. Rev. C

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High-spin states in 138 Nd were investigated by using the 48 Ca + 94 Zr reaction and γ -ray coincidences were acquired with the GASP spectrometer. A rich level scheme was developed including 14 new bands of quadrupole transitions at very high spins. Linking transitions connecting 11 high-spin bands to low-energy states have been observed. Calculations based on the cranked Nilsson-Strutinsky formalism have been used to assign configurations to the observed bands. The main result of these calculations is that all 14 bands exhibit a stable triaxial deformation up to the highest observed spins, giving strong support to the existence of a triaxial minimum with normal deformation and positive asymmetry parameter in nuclei with a few holes in the N = 82 shell closure.

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“…We expect the existence of such yrast states with three quasiparticle configurations involving one proton in πh 11/2 with two neutrons in νh 11/2 and ν(s 1/2 d 3/2 ) 1 . States with configurations based on νh 1 11/2 (s 1/2 d 3/2 ) 1 in even-even nuclei and νh 2 11/2 (s 1/2 d 3/2 ) 1 in odd-even nuclei of the A ∼ 135 mass region are commonly found yrast and often have an isomeric character [20][21][22][23][24][25]. The energies of the low-lying states of 135 La are compared to the low-lying levels of the neighboring even-even isotones 134 Ba and 136 Ce in Fig.…”

Section: Discussionmentioning

confidence: 99%

Spectroscopy of135La

et al. 2013

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The 135 La nucleus has been studied using the fusion-evaporation reaction 124 Sn( 17 N,6n) induced by the 17 N radioactive beam. The level scheme has been constructed from the γ -γ coincidence measurement with an array of 12 HPGe detectors, and the lifetimes of two previously known isomeric states has been deduced. The transitions and their intensities observed in the current work as well as the level scheme derived from them is in agreement with the results of a recently published work. However, our interpretation of the results differs significantly in terms of spin and parity assignments, thus solving various contradictions concerning the configurations of some of the bands discussed in the aforementioned work.

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Development of collective structures over noncollective excitations in139Nd

Cited by 16 publications

References 27 publications

Tilted axis rotation, candidates for chiral bands, and wobbling motion in138Nd

Tilted axis rotation, candidates for chiral bands, and wobbling motion in138Nd

Multiple triaxial bands inNd138

Spectroscopy of135La

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