Superdeformed band at very high spin in Nd140

Hübel, H.; Al-Khatib, A.; Bringel, P.; Bürger, A.; Nenoff, N.; Schönwaßer, G.; Singh, A. K.; Petrache, C. M.; Bianco, G. Lo; Ragnarsson, I.; Hagemann, G.B.; Herskind, B.; Jensen,; Sletten, G.; Fallon, P.; Görgen, A.; Bednarczyk, P.; Curien, D.; Gangopadhyay, G.; Korichi, A.; Лопез-Мартенс, А.; Rao, B. V. Thirumala; Reddy, T. Seshi; Singh, Nirmal

doi:10.1103/physrevc.70.064315

Cited by 26 publications

(78 citation statements)

References 35 publications

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“…In the calculation we have lowered the position of the proton f 7=2 subshell by 0.4 MeV with respect to the standard CNS parameters [17] to obtain a proper splitting between the bands at I 15@. It is interesting to note that these bands in 58 Ni are similar to bands previously observed in 146-148 Gd [2,19] and 140 Nd [20], respectively. In all cases the third ( 5=2) orbital of an intruder high-j shell interacts with the lowest orbital from the ''low-j'' shells.…”

mentioning

confidence: 52%

Ni58: An Unpaired Band Crossing at New Heights of Angular Momentum for Rotating Nuclei

Rudolph

Carlsson²,

Ragnarsson³

et al. 2006

Phys. Rev. Lett.

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High-spin states in 58Ni have been investigated by means of the fusion-evaporation reaction 28Si(32S, 2p)58Ni at 130 MeV beam energy. Discrete-energy levels are observed in 58Ni at record-breaking 42 MeV excitation energy and angular momenta in excess of 30h. The states form regular rotational bands with unprecedented high rotational frequencies. A comparison with configuration dependent cranked Nilsson-Strutinsky calculations reveals an exceptional two-band crossing scenario, the interaction strength of which is strongly shape dependent.

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confidence: 52%

Ni58: An Unpaired Band Crossing at New Heights of Angular Momentum for Rotating Nuclei

Rudolph

Carlsson²,

Ragnarsson³

et al. 2006

Phys. Rev. Lett.

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“…[17][18][19]. The deformation of the second well is then increasing with increasing mass, reaching ε ≈ 0.45 in the recently discovered SD band in 140 Nd [20] and coming close to ε ≈ 0.6 (corresponding to a nuclear axis ratio of 2:1) at the upper end near A = 150; see, e.g., the quadrupole moments deduced for the SD bands of Dy and Gd nuclei in Refs. [21][22][23][24].…”

Section: Introductionmentioning

confidence: 88%

Evolution from spherical single-particle structure to stable triaxiality at high spins inNd140

Petrache¹,

Fantuzi²,

LoBianco³

et al. 2005

Phys. Rev. C

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The level structure of 140 60 Nd 80 has been established up to spin 48 by in-beam γ -ray spectroscopy by use of the 96 Zr( 48 Ca, 4n) reaction. High-fold γ -ray coincidences were measured with the EUROBALL spectrometer. Twelve new rotational bands have been discovered at high spins. They are interpreted as being formed in a deep triaxial minimum at ε 2 ≈ 0.25 and γ ≈ 35 • . Possible configurations are assigned to the observed bands on the basis of configuration-dependent cranked Nilsson-Strutinsky calculations.

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“…At I = 60, the minimum at ε 2 ≈ 0.40, γ ≈ 0 • starts to become competitive. It appears that the superdeformed band in 140 Nd is built from configurations in this minimum [23].…”

Section: B Typical Yrast Configurations With Increasing Spinmentioning

confidence: 94%

“…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]. The total number of bands identified in 138 Nd, including the 21 bands at low and medium spins reported recently in Ref.…”

Section: Introductionmentioning

confidence: 94%

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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Superdeformed band at very high spin in Nd140

Cited by 26 publications

References 35 publications

Ni58: An Unpaired Band Crossing at New Heights of Angular Momentum for Rotating Nuclei

Ni58: An Unpaired Band Crossing at New Heights of Angular Momentum for Rotating Nuclei

Evolution from spherical single-particle structure to stable triaxiality at high spins inNd140

Multiple triaxial bands inNd138

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