Recoil-distance lifetime measurements of the ground-state band in 168Dy, 170Er and 174Yb

Sie, S.H.; Gebbie, D.W.

doi:10.1016/0375-9474(77)90530-9

Cited by 15 publications

(3 citation statements)

References 29 publications

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“…The background-corrected value for the centroid was 0.019(4) ns. The additional correction for the PRC then gave τ ( 164 Dy, 6 + 1 ) = 0.031(8) ns, corresponding to T 1/2 = 22(6) ps, consistent with the literature value of 27.2(8) ps [33,35].…”

Section: A 164 Dysupporting

confidence: 86%

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Half-life measurements in Dy164,166 using γ−γ fast-timing spectroscopy with the
Canavan¹,
Rudigier²,
Regan³
et al. 2020
Phys. Rev. C

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We report on the measurement of lifetimes of excited states in the near-mid-shell nuclei 164,166 Dy using the gamma-ray coincidence fast-timing method. The nuclei of interest were populated using reactions between an 18 O beam and a gold-backed isotopically enriched 164 Dy target of thickness 6.3 mg/cm 2 at primary beam energies of 71, 76, and 80 MeV from the IPN-Orsay laboratory, France. Excited states were populated in 164 Dy, 166 Dy, and 178,179 W following Coulomb excitation, inelastic nuclear scattering, two-neutron transfer, and fusionevaporation reaction channels respectively. Gamma rays from excited states were measured using the ν-Ball high-purity germanium (HPGe)-LaBr 3 hybrid γ-ray spectrometer with the excited state lifetimes extracted using the fast-timing coincidence method using HPGe-gated LaBr 3-LaBr 3 triple coincident events. The lifetime of the first I π = 2 + excited state in 166 Dy was used to determine the transition quadrupole deformation of this neutron-rich nucleus for the first time. The experimental methodology was validated by showing consistency with previously determined excited state lifetimes in 164 Dy. The half-lives of the yrast 2 + states in 164 Dy and 166 Dy were 2.35(6) and 2.3(2) ns, respectively, corresponding to transition quadrupole moment values of Q 0 = 7.58(9) and 7.5(4) eb, respectively. The lifetime of the yrast 2 + state in 166 Dy is consistent with a quenching of nuclear quadrupole deformation at β ≈ 0.35 as the N = 104 mid-shell is approached.

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Section: A 164 Dysupporting

confidence: 86%

“…This centroid was then corrected for the LaBr 3 time walk using the PRC shown in Fig. 5 to obtain the lifetime of the yrast 4 + state in 164 Dy of τ ( 164 Dy, 4 + 1 ) = 0.273(10) ns [T 1/2 = 0.189 7ns], which compares with the literature value of T 1/2 = 0.201 (8) ns [33,35].…”

Section: A 164 Dymentioning

confidence: 84%

Half-life measurements in Dy164,166 using γ−γ fast-timing spectroscopy with the
Canavan¹,
Rudigier²,
Regan³
et al. 2020
Phys. Rev. C

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“…Figure2. Calculated level scheme of 174 Yb, compared with the experimental data taken from[30,31,9].…”

mentioning

confidence: 99%

Mixing effects onK-forbidden transition rates from the 6⁺isomers in theN= 104 isotones

Chen

Sun

Walker

et al. 2012

J. Phys. G: Nucl. Part. Phys.

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Abstract.The problem of the very different E2 decay rates from the two-quasineutron K π = 6 + isomers in the N = 104 isotones 172 Er, 174 Yb, 176 Hf, and 178 W is investigated using the triaxial projected shell model with inclusion of multi-quasiparticle configurations. It is demonstrated that the highly K-forbidden transition from the 6 + isomer to the ground-state band is sensitive to mixing with the 6 + state of the γ-vibrational band. Thus the inter-band transitions, and lifetimes, depend on the relative position of the γ-band and the isomeric state in each isotone.

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Nuclear data sheets update for A = 174

Browne

1991

Nuclear Data Sheets

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Recoil-distance lifetime measurements of the ground-state band in 168Dy, 170Er and 174Yb

Cited by 15 publications

References 29 publications

Half-life measurements in Dy164,166 using γ−γ fast-timing spectroscopy with the
Canavan¹,
Rudigier²,
Regan³
et al. 2020
Phys. Rev. C

Half-life measurements in Dy164,166 using γ−γ fast-timing spectroscopy with the
Canavan¹,
Rudigier²,
Regan³
et al. 2020
Phys. Rev. C

Mixing effects onK-forbidden transition rates from the 6⁺isomers in theN= 104 isotones

Nuclear data sheets update for A = 174

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Recoil-distance lifetime measurements of the ground-state band in 168Dy, 170Er and 174Yb

Cited by 15 publications

References 29 publications

Half-life measurements in Dy164,166 using γ−γ fast-timing spectroscopy with the Canavan1, Rudigier2, Regan3 et al. 2020Phys. Rev. C

Half-life measurements in Dy164,166 using γ−γ fast-timing spectroscopy with the Canavan1, Rudigier2, Regan3 et al. 2020Phys. Rev. C

Mixing effects onK-forbidden transition rates from the 6+isomers in theN= 104 isotones

Nuclear data sheets update for A = 174

Contact Info

Product

Resources

About

Half-life measurements in Dy164,166 using γ−γ fast-timing spectroscopy with the
Canavan¹,
Rudigier²,
Regan³
et al. 2020
Phys. Rev. C

Half-life measurements in Dy164,166 using γ−γ fast-timing spectroscopy with the
Canavan¹,
Rudigier²,
Regan³
et al. 2020
Phys. Rev. C

Mixing effects onK-forbidden transition rates from the 6⁺isomers in theN= 104 isotones