Two-quasiparticle and collective excitations in transitional 108,110 Pd nuclei

Lalkovski, S.; Minkova, A.; Porquet, M. G.; Bauchet, A.; Deloncle, I.; Astier, A.; Buforn, N.; Donadille, L.; Dorvaux, O.; Gall, B.; Lucas, R.; Meyer, M.; Prévost, A.; Redon, N.; Schulz, N.; Stézowski, O.

doi:10.1140/epja/i2003-10098-x

Cited by 29 publications

(23 citation statements)

References 31 publications

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“…Previous results [8,10], in particular a recent one obtained from an induced fission experiment in EUROBALL4 [11], have essentially been confirmed and complemented. New structures with rotational characteristics have been observed.…”

Section: Introductionmentioning

confidence: 53%

High-spin structures inPd108: γ-vibrational band and two-quasineutron excitations

et al. 2005

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The high-spin structures of the 108 Pd nucleus have been studied with the 100 Mo( 11 B, p2nγ ) reaction at 43 MeV incident energy. γ -γ -t, γ -γ -charged-particle coincidences and directional correlation ratios were measured using the SACI-PERERE γ spectrometer formed by four Compton suppressed HPGe detectors and a 4π charged-particle ancillary detector system. Recent results for the γ -vibrational band and the νh 11/2 ⊗ ν(g 7/2 , d 5/2 ) negative parity structures have been confirmed and complemented. A new band tentatively based on the second lowest (νh 11/2 ) excitation has been observed.

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Section: Introductionmentioning

confidence: 53%

High-spin structures inPd108: γ-vibrational band and two-quasineutron excitations

et al. 2005

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“…Such an energy staggering was actually observed. The γ-bands in the transitional Pd region were systematically discussed in [3] and compared with the γ-bands systematics in corresponding Ru isotones. Similarly, γ-softness rather than rigid triaxiality was suggested.…”

Section: Discussionmentioning

confidence: 99%

“…It was concluded that 108,110,112 Pd are softer than 114,116 Pd and that Pd isotopes are softer than Ru isotopes [3]. The present study of 109 Pd and 111 Pd is intended to shed more light on the question of γ-softness in the chain of Pd isotopes.…”

Section: Introductionmentioning

confidence: 89%

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Observation of positive-parity bands in109Pd and111Pd: Enhancedγsoftness

et al. 2012

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The neutron-rich nuclei 109 Pd and 111 Pd were produced as fission fragments following the 30 Si + 168 Er reaction at 142 MeV. Using the identification based on the coincidences with the complementary fission fragments, the only positive-parity bands observed so far in 109 Pd and 111 Pd emerged from this work. A band, built on top of the 5/2 + ground state exhibiting ∆I = 1 energy-level staggering, was observed in each of these nuclei. Both nuclei of interest, 109 Pd and 111 Pd, are suggested to lie in the transitional region of Pd isotopes of maximum γ-softness. The ground states of both nuclei are predicted by TRS calculations to be extremely γ-soft with shallow triaxial minima. The first crossing in the new bands is proposed to be due to an alignment of h 2 11/2 neutrons.

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“…Refs. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]). The precise origins and evolutions of such phenomena are still not well-understood.…”

Section: Introductionmentioning

confidence: 99%

New lifetime measurements inPd109and the onset of deformation atN=60

et al. 2015

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Several new sub-nanosecond lifetimes were measured in 109 Pd using the fast-timing βγγ(t) method. Fission fragments of the A=109 mass chain were produced by bombarding natural uranium with 30 MeV protons at the Jyväskylä Ion Guide Isotope Separator On-Line (IGISOL) facility. Lifetimes were obtained for excited states in 109 Pd populated following β decay of 109 Rh. The new lifetimes provide some insight into the evolution of nuclear structure in this mass region. In particular, the distinct structure of the two low-lying 7/2 + states occurring systematically across the Pd isotopic chain is supported by the new lifetime measurements. The available nuclear data indicate a sudden increase in deformation at N =60 which is related to the strong p-n interaction between πg 9/2 and νg 7/2 valence nucleons expected in this region.

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Two-quasiparticle and collective excitations in transitional 108,110 Pd nuclei

Cited by 29 publications

References 31 publications

High-spin structures inPd108: γ-vibrational band and two-quasineutron excitations

High-spin structures inPd108: γ-vibrational band and two-quasineutron excitations

Observation of positive-parity bands in109Pd and111Pd: Enhancedγsoftness

New lifetime measurements inPd109and the onset of deformation atN=60

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