Decay of a microsecond seniority 3 isomeric state in
Hf155
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Published:2024-09-03
Issue:3
Volume:110
Page:
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ISSN:2469-9985
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Container-title:Physical Review C
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language:en
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Short-container-title:Phys. Rev. C
Author:
Alayed B.12, Page R. D.2ORCID, Joss D. T.2, Uusitalo J.32, Qi C.4, Briscoe A. D.23, AlAqeel M. A. M.562, Andel B.7, Antalic S.7, Auranen K.3, Ayatollahzadeh H.8, Badran H.3, Barber L.9, Beeton G.8, Birova M.10, Bogdanoff V.3, Cubiss J. G.11, Cullen D. M.9, Deary J.8, Forsberg U.3, Grahn T.3, Greenlees P. T.3, Hilton J. B.23, Illana A.3, Joukainen H.3, Judson D. S.2, Julin R.3, Jutila H.3, Keatings J. M.8, Labiche M.12, Leino M.3, Lewis M. C.2, Louko J.3, Luoma M.3, Martel I.213, McCarter A.2, McKee P. P.8, Mosat P.7, Nathaniel S. N.2, Neuvonen O.3, O'Donnell D.8, Ojala J.3, Page C. A. A.11, Plaza A. M.23, Pakarinen J.3, Papadakis P.12, Parr E.2, Partanen J.3, Rahkila P.3, Romero J.23, Ruotsalainen P.3, Sandzelius M.3, Sarén J.3, Saygi B.141516, Smallcombe J.217, Smith J. F.8, Sorri J.18, Sullivan C. M.2, Szwec S.3, Tann H.23, Tolosa-Delgado A.3, Uusikylä E.3, Venhart M.10, Waring L. J.2, Zimba G.319
Affiliation:
1. Qassim University 2. University of Liverpool 3. University of Jyväskylä 4. Royal Institute of Technology 5. Physics Department 6. Imam Mohammad Ibn Saud Islamic University 7. Comenius University in Bratislava 8. University of the West of Scotland 9. University of Manchester 10. Slovak Academy of Sciences 11. University of York 12. Daresbury Laboratory 13. University of Huelva 14. Ankara University 15. Nuclear Energy Research Institute 16. Turkish Energy Nuclear and Mineral Research Agency 17. Japan Atomic Energy Agency 18. University of Oulu 19. Facility for Rare Isotope Beams
Abstract
Excited states in the neutron-deficient nuclide Hf155 have been investigated in experiments performed at the Accelerator Laboratory of the University of Jyväskylä. The Hf155 nuclei were produced in fusion-evaporation reactions induced by beams of 295 and 315 MeV Ni58 ions bombarding an isotopically enriched Pd102 target and separated using the recoil mass separator MARA. An isomeric state having a half-life of 510(30) ns was discovered and is interpreted as a seniority υ=3, (πh11/22⊗νf7/2)27/2− configuration. The γ-ray transitions emitted in the deexcitation of the isomeric state to the ground state were identified and a level scheme was constructed, from which the excitation energy of the isomer was determined to be 2581.5(10) keV. A B(E2) value of 0.45(3) W.u. was deduced for the 105.4 keV transition depopulating the isomeric state. The deduced level scheme and B(E2) value are compared with systematics and shell-model calculations.
Published by the American Physical Society
2024
Funder
Science and Technology Facilities Council Seventh Framework Programme Agentúra na Podporu Výskumu a Vývoja Vedecká Grantová Agentúra MŠVVaŠ SR a SAV European Regional Development Fund U.S. Department of Energy Academy of Finland
Publisher
American Physical Society (APS)
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