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Properties of ¹⁸⁷Ta Revealed through Isomeric Decay

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Date

2020

Authors

Walker, Philip M
Hirayama, Y
Lane, Gregory
Watanabe, H
Dracoulis, George
Ahmed, M
Brunet, M
Hashimoto, T
Ishizawa, Satoshi
Kondev, Filip G

Journal Title

Journal ISSN

Volume Title

Publisher

American Physical Society

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.

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Keywords

Citation

URI

http://hdl.handle.net/1885/293444

Collections

ANU Research Publications

Source

Physical Review Letters

Type

Journal article

Book Title

Entity type

Access Statement

Open Access

License Rights

DOI

10.1103/PhysRevLett.125.192505

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PhysRevLett.125.192505.pdf (654.54 KB)

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