Properties of Ta 187 Revealed through Isomeric Decay

P. M. Walker; Y. Hirayama; G. J. Lane; H. Watanabe; G. D. Dracoulis; M. Ahmed; M. Brunet; T. Hashimoto; S. Ishizawa; F. G. Kondev; Yu A. Litvinov; H. Miyatake; J. Y. Moon; M. Mukai; T. Niwase; J. H. Park; Zs Podolyák; M. Rosenbusch; P. Schury; M. Wada; X. Y. Watanabe; W. Y. Liang; F. R. Xu

doi:10.1103/PhysRevLett.125.192505

Properties of Ta 187 Revealed through Isomeric Decay

P. M. Walker^*, Y. Hirayama, G. J. Lane, H. Watanabe, G. D. Dracoulis, M. Ahmed, M. Brunet, T. Hashimoto, S. Ishizawa, F. G. Kondev, Yu A. Litvinov, H. Miyatake, J. Y. Moon, M. Mukai, T. Niwase, J. H. Park, Zs Podolyák, M. Rosenbusch, P. Schury, M. WadaX. Y. Watanabe, W. Y. Liang, F. R. Xu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Mass-separated Ta187114 in a high-spin isomeric state has been produced for the first time by multinucleon transfer reactions, employing an argon gas-stopping cell and laser ionization. Internal γ rays revealed a T1/2=7.3±0.9 s isomer at 1778±1 keV, which decays through a rotational band with perturbations associated with the approach to a prolate-oblate shape transition. Model calculations show less influence from triaxiality compared to heavier elements in the same mass region. The isomer-decay reduced E2 hindrance factor fν=27±1 supports the interpretation that axial symmetry is approximately conserved.

Original language	English
Article number	192505
Journal	Physical Review Letters
Volume	125
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.125.192505
Publication status	Published - 6 Nov 2020

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Walker, P. M., Hirayama, Y., Lane, G. J., Watanabe, H., Dracoulis, G. D., Ahmed, M., Brunet, M., Hashimoto, T., Ishizawa, S., Kondev, F. G., Litvinov, Y. A., Miyatake, H., Moon, J. Y., Mukai, M., Niwase, T., Park, J. H., Podolyák, Z., Rosenbusch, M., Schury, P., ... Xu, F. R. (2020). Properties of Ta 187 Revealed through Isomeric Decay. Physical Review Letters, 125(19), Article 192505. https://doi.org/10.1103/PhysRevLett.125.192505

@article{0023fb8810cc4031bb0c865cab97ccab,

title = "Properties of Ta 187 Revealed through Isomeric Decay",

abstract = "Mass-separated Ta187114 in a high-spin isomeric state has been produced for the first time by multinucleon transfer reactions, employing an argon gas-stopping cell and laser ionization. Internal γ rays revealed a T1/2=7.3±0.9 s isomer at 1778±1 keV, which decays through a rotational band with perturbations associated with the approach to a prolate-oblate shape transition. Model calculations show less influence from triaxiality compared to heavier elements in the same mass region. The isomer-decay reduced E2 hindrance factor fν=27±1 supports the interpretation that axial symmetry is approximately conserved.",

author = "Walker, {P. M.} and Y. Hirayama and Lane, {G. J.} and H. Watanabe and Dracoulis, {G. D.} and M. Ahmed and M. Brunet and T. Hashimoto and S. Ishizawa and Kondev, {F. G.} and Litvinov, {Yu A.} and H. Miyatake and Moon, {J. Y.} and M. Mukai and T. Niwase and Park, {J. H.} and Zs Podoly{\'a}k and M. Rosenbusch and P. Schury and M. Wada and Watanabe, {X. Y.} and Liang, {W. Y.} and Xu, {F. R.}",

note = "Publisher Copyright: {\textcopyright} 2020 American Physical Society. ",

year = "2020",

month = nov,

day = "6",

doi = "10.1103/PhysRevLett.125.192505",

language = "English",

volume = "125",

journal = "Physical Review Letters",

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Walker, PM, Hirayama, Y, Lane, GJ, Watanabe, H, Dracoulis, GD, Ahmed, M, Brunet, M, Hashimoto, T, Ishizawa, S, Kondev, FG, Litvinov, YA, Miyatake, H, Moon, JY, Mukai, M, Niwase, T, Park, JH, Podolyák, Z, Rosenbusch, M, Schury, P, Wada, M, Watanabe, XY, Liang, WY & Xu, FR 2020, 'Properties of Ta 187 Revealed through Isomeric Decay', Physical Review Letters, vol. 125, no. 19, 192505. https://doi.org/10.1103/PhysRevLett.125.192505

TY - JOUR

T1 - Properties of Ta 187 Revealed through Isomeric Decay

AU - Walker, P. M.

AU - Hirayama, Y.

AU - Lane, G. J.

AU - Watanabe, H.

AU - Dracoulis, G. D.

AU - Ahmed, M.

AU - Brunet, M.

AU - Hashimoto, T.

AU - Ishizawa, S.

AU - Kondev, F. G.

AU - Litvinov, Yu A.

AU - Miyatake, H.

AU - Moon, J. Y.

AU - Mukai, M.

AU - Niwase, T.

AU - Park, J. H.

AU - Podolyák, Zs

AU - Rosenbusch, M.

AU - Schury, P.

AU - Wada, M.

AU - Watanabe, X. Y.

AU - Liang, W. Y.

AU - Xu, F. R.

PY - 2020/11/6

Y1 - 2020/11/6

N2 - Mass-separated Ta187114 in a high-spin isomeric state has been produced for the first time by multinucleon transfer reactions, employing an argon gas-stopping cell and laser ionization. Internal γ rays revealed a T1/2=7.3±0.9 s isomer at 1778±1 keV, which decays through a rotational band with perturbations associated with the approach to a prolate-oblate shape transition. Model calculations show less influence from triaxiality compared to heavier elements in the same mass region. The isomer-decay reduced E2 hindrance factor fν=27±1 supports the interpretation that axial symmetry is approximately conserved.

AB - Mass-separated Ta187114 in a high-spin isomeric state has been produced for the first time by multinucleon transfer reactions, employing an argon gas-stopping cell and laser ionization. Internal γ rays revealed a T1/2=7.3±0.9 s isomer at 1778±1 keV, which decays through a rotational band with perturbations associated with the approach to a prolate-oblate shape transition. Model calculations show less influence from triaxiality compared to heavier elements in the same mass region. The isomer-decay reduced E2 hindrance factor fν=27±1 supports the interpretation that axial symmetry is approximately conserved.

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U2 - 10.1103/PhysRevLett.125.192505

DO - 10.1103/PhysRevLett.125.192505

M3 - Article

SN - 0031-9007

VL - 125

JO - Physical Review Letters

JF - Physical Review Letters

IS - 19

M1 - 192505

ER -

Properties of Ta 187 Revealed through Isomeric Decay

Abstract

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