Briscoe, A.D., Page, R.D., Uusitalo, J. et al. (61 more authors) (2023) Decay spectroscopy at the two-proton drip line: radioactivity of the new nuclides 160Os and 156W. Physics Letters B. 138310. ISSN 0370-2693
Abstract
The radioactivity of 76160Os84 and 74156W82 that lie at the two-proton drip line have been measured in an experiment performed at the Accelerator Laboratory of the University of Jyväskylä. The 160Os nuclei were produced using fusion-evaporation reactions induced by a beam of 310 MeV 58Ni ions bombarding a 106Cd target. The 160Os ions were separated in flight using the recoil separator MARA and implanted into a double-sided silicon strip detector, which was used to measure their decays. The α decays of the ground state of 160Os (Eα = 7092(15) keV, t1/2 = 97−32+97 μs) and its isomeric state (Eα = 8890(10) keV, t1/2 = 41−9+15 μs) were measured, allowing the excitation energy of the isomer to be determined as 1844(18) keV. These α-decay properties and the excitation energy of the isomer are compared with systematics. The α decays were correlated with subsequent decays to investigate the β decays of the ground state of 156W, revealing that unlike its isotones, both low-lying isomers were populated in its daughter nuclide, 156Ta. An improved value for the half-life of the proton-decaying high-spin isomeric state in 73156Ta83 of 333−22+25 ms was obtained in a separate experiment using the same experimental systems with a 102Pd target. This result was employed to improve the precision of the half-life determined for 156W, which was measured as 157−34+57 ms.
Metadata
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Copyright, Publisher and Additional Information: | © 2023 The Authors. | ||||
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Institution: | The University of York | ||||
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) | ||||
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Depositing User: | Pure (York) | ||||
Date Deposited: | 20 Nov 2023 10:40 | ||||
Last Modified: | 17 Feb 2024 00:25 | ||||
Published Version: | https://doi.org/10.1016/j.physletb.2023.138310 | ||||
Status: | Published | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1016/j.physletb.2023.138310 |
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