Single- and Double-Octupole Excitations in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Gd</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>148</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>

Lunardi, S.; Kleinheinz, P.; Piiparinen, M.; Ogawa, Masahiro; Lach, M.; Blomqvist, J.

doi:10.1103/physrevlett.53.1531

Cited by 51 publications

(25 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There have been several studies on the coupling of a valence particle to the a46Gd octupole phonon, and the observed anharmonicities could be applied for analysis of more complex octupole excitations [7,8] in neighbouring nuclei. In the coupling of an h11/2 valence proton to the core phonon, as observed [6] in X4VTb, large energy shifts occur for the 17/2 + and 15/2 + septuplet members due to interference of the h11/2 valence proton with the dominant (7~h11/2 d~ 1) amplitude in the core phonon, and this interference should also affect the lower-spin multiplet members which are not yet known.…”

Section: Octupole Statesmentioning

confidence: 99%

The two particle-phonon multiplet ?h 11/2 ?f 7/2 � 3? and higher-lying four-nucleon yrast states in the doubly-odd nucleus 146 63 Eu83

Ercan¹,

Broda²,

Kleinheinz³

et al. 1988

Z. Physik A - Atomic Nuclei

Self Cite

View full text Add to dashboard Cite

Section: Octupole Statesmentioning

confidence: 99%

The two particle-phonon multiplet ?h 11/2 ?f 7/2 � 3? and higher-lying four-nucleon yrast states in the doubly-odd nucleus 146 63 Eu83

Ercan¹,

Broda²,

Kleinheinz³

et al. 1988

Z. Physik A - Atomic Nuclei

Self Cite

View full text Add to dashboard Cite

“…[10]. States of two-phonon octupole character in 147 Gd and 148 Gd built on the νf 7/2 ground state and the (νf 2 7/2 )6 + state, respectively, have been characterized through the observation of cascades of two stretched E3 transitions [11][12][13]. Their energies and the measured E3 strengths are quite accurately predicted in elementary calculations.…”

mentioning

confidence: 90%

“…[11]. The validity of this approach has already been discussed and tested experimentally in calculating the E3 strengths of the decays of the two-phonon octupole states in 147 Gd and 148 Gd [11][12][13]. From the predicted B(E3; 6 + → 3 − ) of 56 W.u.…”

mentioning

confidence: 99%

Two-phonon octupole excitation inGd146

et al. 2010

Self Cite

View full text Add to dashboard Cite

Based on experimental evidence from the 144 Sm(α,2n) reaction, the 3484.7-keV 6 + state in 146 Gd is identified as the highest-spin member of the 3 − ⊗ 3 − two-phonon octupole quartet. In the harmonic approximation for noninteracting phonons, a degenerate two-phonon multiplet should occur at twice the energy of the one-phonon state. For low-energy quadrupole (λ = 2) shape vibrations, multiphonon states have been characterized in many even-even nuclei; however, these structures frequently exhibit large anharmonicities, even in nearly spherical nuclei [1]. The octupole (λ = 3) mode in doubly magic nuclei likely comes much closer to the ideal harmonic oscillator as a result of the smaller vibrational amplitudes and the larger number of particles participating in the motion. Indeed, a two-phonon 3 − ⊗ 3 − quartet (J π = 0 + , 2 + , 4 + , and 6 + ) should occur at twice the energy of the octupole phonon and is expected to decay with B(E3) values which are twice that of the 3 − → 0 + transition [1,2]. Unfortunately, two-phonon excitations of the octupole type have proven difficult to identify.It is not surprising that 208 Pb, with its 3 − first-excited state at 2614 keV and B(E3; 3 − → 0 + ) of 34 W.u.[3], has been the subject of many searches for the two-phonon octupole quartet at about 5.2 MeV, that is, at 2hω 3 [4]. Firm evidence, an observed cascade of two E3 transitions from a 0 + state at 5241 keV, for the lowest-spin member of the two-phonon quartet in 208 Pb has been obtained [5]. In addition, candidates for the 2 + and 4 + members of the quartet at nearly harmonic energies have been proposed, but these identifications are based primarily on energy arguments and E1 transition rates; the signature cascade of E3 transitions was not observed [6]. Transfer reaction and inelastic light-ion scattering studies [7] support these assignments, but no clear candidate for the 6

show abstract

“…The excitations built upon the (νf 7/2 ) 7/2 − ground state and the low-lying 13 One thing worth mentioning is that, due to the neutron number of these transitional nuclei close to the octupole driving number 88 [9], the octupole degree of freedom is expected to play a role in their structures. Octupole 3 − states have been observed in the even-even nuclei around the A ∼ 150 mass region [10][11][12][13][14][15]. For the N = 85 isotones 149 Gd, 151 Dy, and 153 Er, the low-lying positive-parity 13/2 + states have been described by a dominant i 13/2 configuration and a small mixing with the 3 − ⊗ f 7/2 excitation [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy ofYb155: Structure evolution in theN=85isotones

Li¹,

Xu²,

Zhang³

et al. 2016

Phys. Rev. C

View full text Add to dashboard Cite

High-spin states in 155 Yb have been studied via the 144 Sm( 16 O ,5n) 155 Yb reaction at a beam energy of 118 MeV. One negative-parity and one positive-parity cascade built on the νf 7/2 and νi 13/2 states, respectively, are established for the first time. The structures observed in 155 Yb are compared with those in the neighboring N = 85 isotones and with semiempirical shell-model (SESM) calculations. According to adiabatic and configuration-fixed constrained triaxial covariant density functional theory (CDFT) calculations, a coexistence of prolate and oblate shapes is predicted to exist in 155 Yb.

show abstract

Single- and Double-Octupole Excitations inGd148

Cited by 51 publications

References 6 publications

The two particle-phonon multiplet ?h 11/2 ?f 7/2 � 3? and higher-lying four-nucleon yrast states in the doubly-odd nucleus 146 63 Eu83

The two particle-phonon multiplet ?h 11/2 ?f 7/2 � 3? and higher-lying four-nucleon yrast states in the doubly-odd nucleus 146 63 Eu83

Two-phonon octupole excitation inGd146

Spectroscopy ofYb155: Structure evolution in theN=85isotones

Contact Info

Product

Resources

About