Investigation of high-spin states in 138, 139Nd

Müller-Veggian, M.; Beuscher, H.; Haenni, D.R.; Lieder, R.M.; Neskakis, A.; Mayer‐Böricke, C.

doi:10.1016/0375-9474(80)90433-9

Cited by 38 publications

(21 citation statements)

References 28 publications

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“…We add credibility to the 69 keV value which results from the difference between the 8 + and 10 + states whose energies are well established through the connecting transitions between many high-spin states of the present level scheme which were not observed in Ref. [20]. The only other observed transition populating the 8 + state is the newly observed 1238 keV transition deexciting the dipole band D4.…”

Section: Results and Level Schemesupporting

confidence: 73%

“…Evidence for the existence of this transition was given in Ref. [20], where the measured en-ergy was 66.9 keV. We add credibility to the 69 keV value which results from the difference between the 8 + and 10 + states whose energies are well established through the connecting transitions between many high-spin states of the present level scheme which were not observed in Ref.…”

Section: Results and Level Schemesupporting

confidence: 69%

“…The energies, relative intensities, DCO ratios and spin-parity assignments of the observed transitions are reported in Table I. The spectroscopic data on 138 Nd are very much enriched with respect to the previous studies [11,[17][18][19][20][21]. The newly constructed level scheme will be discussed separately for the bands of quadrupole and dipole transitions.…”

Section: Results and Level Schemementioning

confidence: 99%

“…High-spin states in 138 Nd have been previously studied by Müller-Veggian et al [19,20] and de Angelis et al [21] up to spin 19 and 21 , respectively. More recently, four high-spin bands were observed in 138 Nd using the 94 Zr( 48 Ca,4n) reaction at an energy 195 MeV [11].…”

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: Results and Level Schemesupporting

confidence: 73%

Section: Results and Level Schemesupporting

confidence: 69%

Section: Results and Level Schemementioning

confidence: 99%

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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“…The elusive 23/2 + isomer in 139 Nd was first reported by Müller-Veggian et al who observed a long-living delayed component in off-beam γ γ -coincidence spectra and reported a first lower half-life limit [35]. Later, the isomer's location was constrained to be above the 19/2 + 1 state and a first precise half-life of T 1/2 = 272(4) ns could be obtained [36].…”

Section: Introductionmentioning

confidence: 99%

High-spin structures in Xe132 and Xe133 and evidence for isomers along the N
Vogt¹,
Siciliano²,
Birkenbach³
et al. 2017
Phys. Rev. C
12
2
12
0
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The transitional nuclei 132 Xe and 133 Xe are investigated after multinucleon-transfer (MNT) and fusionevaporation reactions. Both nuclei are populated (i) in 136 Xe + 208 Pb MNT reactions employing the highresolution Advanced GAmma Tracking Array (AGATA) coupled to the magnetic spectrometer PRISMA, (ii) in the 136 Xe + 198 Pt MNT reaction employing the GAMMASPHERE spectrometer in combination with the gas-detector array CHICO, and (iii) as an evaporation residue after a 130 Te(α,xn) 134−xn Xe fusion-evaporation reaction employing the HORUS γ -ray array at the University of Cologne. The high-spin level schemes are considerably extended above the J π = (7 − ) and (10 + ) isomers in 132 Xe and above the 11/2 − isomer in PHYSICAL REVIEW C 96, 024321 (2017) isotones. Shell-model calculations employing the SN100PN and PQM130 effective interactions reproduce the experimental findings and provide guidance to the interpretation of the observed high-spin features.

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