Electromagnetic properties and high-spin states in 173Ta

Carlsson, Håkan; Bark, R. A.; Ekström, L.P.; Nordlund, Anders; Ryde, H.; Hägemann, C.; Freeman, S. J.; Jensen, H.J.; Lönnroth, T.; Piiparinen, M.; Schnack-Petersen, H.; Ingebretsen, F.; Tjøm, P.O.

doi:10.1016/0375-9474(95)00210-r

Cited by 33 publications

(8 citation statements)

References 35 publications

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“…In accordance with the work of Carlsson et al [9], the band head is placed at 173 keV. band members, additional delayed transitions are observed at 351, 604, and 835 keV, feeding into the I π = 21/2 − , 19/2 − and 17/2 − levels, respectively.…”

Section: Resultssupporting

confidence: 80%

“…It is at first sight surprising that Carlsson et al [9] did not identify the isomer, despite high statistics and the use of both thin (935 μ/cm 2 ) and thick (3.0 mg/cm 2 ) targets, the latter with a 5.8 mg/cm 2 backing of 208 Pb. We suggest that their heavier beam ( 19 F) led to less population of the very non-yrast isomer, and, perhaps more significantly, the use of a DC beam gave less than optimal isomer sensitivity.…”

Section: Resultsmentioning

confidence: 99%

“…[15]) to use in-band γ -ray branching ratios to obtain values of |(g K − g R )|/Q 0 , where g K is the intrinsic configuration g factor, g R is the rotational g factor, and Q 0 is the intrinsic quadrupole moment. For the K π = 9/2 − band, Carlsson et al [9] use g R = 0.40 and Q 0 = 7.0 eb. With those values we find, using their branching ratios and (g K − g R ) > 0, that g K = 1.17 (6), assuming an uncertainty of ±0.05 in the g R value [15,16].…”

Section: Discussionmentioning

confidence: 99%

“…In 173 Ta, a three-quasiparticle, K π = (21/2 − ) isomer has previously been reported, from highresolution germanium-detector γ -ray measurements following the 165 Ho( 12 C,4n) and 175 Lu(α,6n) fusion-evaporation reactions, but only an approximate half-life of T 1/2 ≈ 100 ns was determined [7]. Subsequent relatively high-statistics studies using the 159 Tb( 18 O,4n) and 160 Gd( 19 F,6n) reactions [8,9] did not confirm the existence of this isomer. However, support for the isomer came from measurements of its electric quadrupole moment [10] and its magnetic dipole moment [11], both using low-resolution sodium iodide detectors in conjunction with the 165 Ho( 12 C,4n) reaction, and a half-life of 132(3) ns was reported [11].…”

Section: Introductionmentioning

confidence: 99%

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Three-quasiparticle isomer in Ta173 and the excitation energy dependence of K -forbidden transition rates

et al. 2017

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Using the 168 Er( 10 B,5n) reaction at a beam energy of 68 MeV, new data have been obtained for the population and decay of a T 1/2 = 148 ns, K π = 21/2 − three-quasiparticle isomer at 1717 keV in 173 Ta. Revised decay energies and intensities have been determined, together with newly observed members of a rotational band associated with the isomer. By comparison with other isomers in the A ≈ 180 deformed region, the 173 Ta isomer properties help to specify the key degrees of freedom that determine K-forbidden transition rates. In particular, when all three quasiparticles are of the same nucleon type, there is a strong dependence of the E2 reduced hindrance factor on the isomer excitation energy.

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Three-quasiparticle isomer in Ta173 and the excitation energy dependence of K -forbidden transition rates

et al. 2017

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“…In all cases the favored signature is substantially more aligned than the unfavored partner before the AB crossing. At low spins the band mixes strongly with the configuration in a number of odd-A rare-earth nuclei, e.g., 165 Tm [34], 169 Lu [38], 171 Lu [39], and 173 Ta [40] where an enhanced E1 strength was found systematically. The enhancement has been analyzed by Hagemann et al [41] in terms of a coupling to octupole vibrational degrees of freedom for the core.…”

Section: Band 8: C Dmentioning

confidence: 99%

Toward complete spectroscopy ofLu167

Roux¹,

Ma²,

Hagemann

et al. 2015

Phys. Rev. C

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Excited states in 167 Lu were populated in the 123 Sb( 48 Ca,4n) reaction at 203 MeV and decay γ-rays measured using the Gammasphere spectrometer array. Two triaxial strongly deformed bands were identified previously and interpreted as zero-and one-phonon wobbling excitations. As a result of more extensive band search, the level scheme has been considerably extended to include ten new rotational bands, and some 630 γ-ray transitions. A number of interband linking transitions were revealed, so that all but two bands could be connected with each other. Configurations are proposed for all new bands based on measured observables, with the help of Cranked Shell Model calculations. A γ-ray sequence, previously suggested as a triaxial strongly deformed band based on quasiparticle excitations coexisting with the wobbling excitation in the triaxial potential well, has now been determined to be a signature partner of a coupled band, associated with a normal deformed five-quasiparticle configuration. The possibility for two new bands being associated with triaxial deformation is discussed.

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Energy levels and branching ratios for Ta-173(Tantalum-173)

Sukhoruchkin¹,

Soroko²

2008

Tables of Excitations of Proton- And Neutron-Rich Unstable Nuclei

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Electromagnetic properties and high-spin states in 173Ta

Cited by 33 publications

References 35 publications

Three-quasiparticle isomer in Ta173 and the excitation energy dependence of K -forbidden transition rates

Three-quasiparticle isomer in Ta173 and the excitation energy dependence of K -forbidden transition rates

Toward complete spectroscopy ofLu167

Energy levels and branching ratios for Ta-173(Tantalum-173)

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