Population and decay of a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mi>π</mml:mi></mml:msup><mml:mo>=</mml:mo><mml:msup><mml:mn>8</mml:mn><mml:mo>−</mml:mo></mml:msup></mml:mrow></mml:math>two-quasineutron isomer in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Pu</mml:mi><mml:mprescripts /><mml:none /><mml:mn>244</mml:mn></mml:mmultiscripts></mml:math>

Hota, S. S.; Chowdhury, P.; Ahmad, I.; Carpenter, M. P.; Chiara, C. J.; Greene, J. P.; Hoffman, C. R.; Jackson, E.G.; Janssens, R. V. F.; Kay, B. P.; Khoo, T. L.; Kondev, F. G.; Lakshmi, S.; Lalkovski, S.; Lauritsen, T.; Lister, C. J.; McCutchan, E. A.; Moran, Ken; Peterson, D.; Shirwadkar, Urmila; Seweryniak, D.; Stefanescu, I.; Toh, Y.

doi:10.1103/physrevc.94.021303

Cited by 6 publications

(5 citation statements)

References 35 publications

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“…A 2-quasineutron, [624]7/2 ⊗ [734]9/2 configuration has been proposed for the K π = 8 − isomer in 246 Cm, based on β − decay arguments [10]. The same configuration has also been proposed for the series of K π = 8 − isomers observed in neighboring N = 150 isotones, from β-decay and transferreaction data, as well as M1/E 2 branching ratios of transitions between and within the signature partners of strongly coupled, prompt rotational structures built on the isomeric states [5,6,10,24].…”

Section: Discussionmentioning

confidence: 76%

“…The f ν value for the corresponding strongest 679-keV E1 branch in 246 Cm is 166, where the halflife measured in the present work was combined a more precise branching ratio for the transition (60%), compiled in the isomer database from β-decay studies [4]. The f ν values for similar K = 8, E1 transitions from other 2-qp, K π = 8 − isomers in neighboring N = 150 isotones are 177, 213, and 178 in 244 Pu [24], 250 Fm [5], and 252 No [6], respectively. These indicate that K is indeed a robust quantum number in this mass region and confirms axial symmetry for the Cm isotopes.…”

Section: Discussionmentioning

confidence: 94%

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Decay spectroscopy of two-quasiparticle K isomers in Cm246,248 via inelastic and transfer reactions

et al. 2019

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The decay of K isomers in Cm (Z = 96) isotopes has been studied using inelastic and transfer reactions. The half-life of a previously identified 2-quasiparticle (qp) K π = 8 − isomer in 246 Cm has been measured. A new 2-qp isomer is observed in 248 Cm, its half-life measured and its decay scheme established. The reduced K hindrances extracted for the decay transitions from the isomers in 246,248 Cm indicate K to be a robust quantum number and validate axial symmetry in these nuclei. The excitation energies of the 2-qp isomers in 246 Cm (N = 150) and 248 Cm (N = 152) support the persistence of a deformed subshell gap at N = 152 in the Z ≈ 100 region down to Z = 96 nuclei.

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Section: Discussionmentioning

confidence: 76%

Section: Discussionmentioning

confidence: 94%

Decay spectroscopy of two-quasiparticle K isomers in Cm246,248 via inelastic and transfer reactions

et al. 2019

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“…Unlike the 8 − isomer in the N = 150 isotones, its configuration is accepted as a two-neutron state with configuration ν 9 3.572 1 The K π values favored by the GM rules [48] are underlined for each two-particle state. and 244 Pu [50] in the literature, the configuration of the observed 8 − isomer at 1.297 MeV in 254 No is in dispute up to now. The two-neutron configuration is favored by the most recent experiment study [11] whereas the two-proton configuration π 7 2 − [514] ⊗ π 9 2 + [624] is suggested in the earlier experimental works [8][9][10].…”

Section: Multi-particle Statesmentioning

confidence: 84%

“…and 244 Pu [50] in the literature, the configuration of the observed 8 − isomer at 1.297 MeV in 254 No is in dispute up to now. The two-neutron configuration is favored by the most recent experiment study [11] whereas the two-proton configuration π 7…”

Section: Theoretical Frameworkmentioning

confidence: 84%

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High-K multi-particle bands and pairing reduction in ²⁵⁴No *

Zhao

Zhang

et al. 2020

Chinese Phys. C

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The multi-particle states and rotational properties of two-particle bands in 254 No are investigated by the cranked shell model (CSM) with pairing correlations treated by a particle-number conserving (PNC) method. For the first time, the rotational bands on top of two-particle K π = 3 + , 8 − and 10 + states and the pairing reduction are studied theoretically in 254 No. The experimental excitation energies and moments of inertia for the multi-particle state are reproduced well by the calculation. Better agreement with the data are achieved by including the high-order deformation ε6 which leads to enlarged Z = 100 and N = 152 deformed shell gaps. The rise of the J (1) in these two-particle bands compared with the ground-state band is attributed to the pairing reduction due to the Pauli blocking effects.

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