Quenched E1 transition rates in 231Th

Aas, AJ; Mach, H.; Kvasil, J.; Borge, M. J. G.; Fogelberg, B.; Grant, I. S.; Gulda, K.; Hagebø, E.; Hoff, P.; Kurcewicz, W.; Lindroth, A.; Løvhøiden, G.; Macková, Anna; Martínez, T.; Rubio, B.; Sanchez‐Vega, M.; Smith, J. F.; Taín, J. L.; Taylor, Ros; Tengblad, O.; Thorsteinsen, T.F.

doi:10.1016/s0375-9474(99)00307-3

Cited by 22 publications

(22 citation statements)

References 23 publications

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“…This effect persists in the ocupole soft nuclei where significant octupole coupling may exist between selected close-lying bands of opposite parity. For this reason these bands are labeled parity partner bands [24] (see also the discussion in Sec. IV C).…”

Section: A Single Quasiparticle Configurations In 229 Thmentioning

confidence: 99%

“…The best description of this situation is provided by the QPPM (see Refs. [24,33,39] and citations therein), where the lowest intrinsic states in odd-A nuclei are understood as the linear combinations of quasiparticle and quasiparticle-plus-phonon components. In such a way the QPPM takes into account an odd quasiparticle and vibrating even-even core.…”

Section: Quasiparticle-plus-phonon Model Calculationsmentioning

confidence: 99%

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Nuclear structure ofTh229

Ruchowska

Cederkäll

2006

Phys. Rev. C

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Lifetimes of excited states in 229 Th, populated in the β decay of 229 Ac, have been measured using the advanced time-delayed βγ γ (t) method. Half-lives of 14 states have been determined including 11 of them for the first time. Twenty-seven new γ lines have been introduced into the β-decay scheme of 229 Ac based on results of γ γ coincidence measurements. Reduced transition probabilities have been determined for more than 70 γ transitions in 229 Th. Average |D 0 | values of 0.029(1), 0.077(3), and 0.024(5) e fm have been deduced for the lowest K π = 1/2 ± , 3/2 ± , and 5/2 ± parity partner bands, respectively. Excited states in 229 Th and experimental transition rates have been interpreted within the quasiparticle-plus-phonon model. The half-life of the 3.5-eV, 3/2 + isomeric state is predicted to be about 10 h. Potential energy surfaces on the (β 2 , β 3 ) plane for the lowest single quasiparticle configurations in 229 Th have been calculated using the Strutinsky method.

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Section: A Single Quasiparticle Configurations In 229 Thmentioning

confidence: 99%

Section: Quasiparticle-plus-phonon Model Calculationsmentioning

confidence: 99%

Nuclear structure ofTh229

Ruchowska

Cederkäll

2006

Phys. Rev. C

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“…−5 e 2 fm 2 , see [14,16]. Strong mixing between bands is indicated by the fact that no clear differences appear between B(E1) values for transitions connecting the parity partner bands (intraband transitions) with those connecting opposite parity bands with different K (interband transitions).…”

Section: Reduced Transition Probabilitiesmentioning

confidence: 99%

“…Relatively large B(E1) rates have been measured indicating the presence of octupole correlations in 227 Fr [11], 229 Ra [12] and 229 Th [13,14]. Much weaker but still noticeable are the correlations in the heavier 231 Ra [15] and 231 Th [16] isotopes. We report here on the structure of their isobar, 231 Ac.…”

Section: Introductionmentioning

confidence: 96%

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Nuclear structure of 231Ac

Boutami¹,

Borge²,

Mach³

et al. 2008

Nuclear Physics A

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The low-energy structure of 231 Ac has been investigated by means of γ ray spectroscopy following the β − decay of 231 Ra. Multipolarities of 28 transitions have been established by measuring conversion electrons with a mini-orange electron spectrometer. The decay scheme of 231 Ra → 231 Ac has been constructed for the first time. The Advanced Time Delayed βγγ(t) method has been used to measure the half-lives of five levels. The moderately fast B(E1) transition rates derived suggest that the octupole effects, albeit weak, are still present in this exotic nucleus.

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90-Thorium

Malov

Z = 63 - 100

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Quenched E1 transition rates in 231Th

Cited by 22 publications

References 23 publications

Nuclear structure ofTh229

Nuclear structure ofTh229

Nuclear structure of 231Ac

90-Thorium

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