RT Journal Article
T1 Decay spectroscopy at the two-proton drip line: Radioactivity of the new nuclides 160Os and 156W
A1 Briscoe, Andrew
A1 Martel Bravo, Ismael
A1 Zimba, George
AB The radioactivity of 76160Os84 and 74156W82 that lie at the two-proton drip line has 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.
PB Elsevier
SN 0370-2693
SN 1873-2445 (electrónico)
YR 2023
FD 2023-11
LK https://hdl.handle.net/10272/23933
UL https://hdl.handle.net/10272/23933
LA eng
NO Briscoe, A. D., Page, R. D., Uusitalo, J., Joss, D. T., AlAqeel, M. A. M., Alayed, B., Andel, B., Antalic, S., Auranen, K., Ayatollahzadeh, H., Badran, H., Barber, L., Beeton, G., Birova, M., Bogdanoff, V., Clark, R. M., Cubiss, J. G., Cullen, D. M., Deary, J., … Zimba, G. (2023). Decay spectroscopy at the two-proton drip line: Radioactivity of the new nuclides 160Os and 156W. In Physics Letters B (Vol. 847, p. 138310). Elsevier BV. https://doi.org/10.1016/j.physletb.2023.138310
NO Financial support for this work has been provided by the UnitedKingdom Science and Technology Facilities Council (STFC) through thegrants ST/P004598/1, ST/V001027/1 and ST/V001035/1; the EU 7thFramework Programme “Integrating Activities - Transnational Access”,Project No.: 262010 (ENSAR); by the Slovak Research and DevelopmentAgency (Contract Nos. APVV-18-0268 and APVV-20-0532) andSlovak Grant Agency VEGA (Contract Nos. 1/0651/21 and 2/0067/21);by the Research and Development Operational Programme funded bythe European Regional Development Fund, project No. ITMS code26210120023 (20%); by the US DOE under Contract No. DE-AC02-05CH11231 (LBNL); and by the Academy of Finland under the FinnishCentre of Excellence Programme 2012-2017 (Nuclear and AcceleratorBased Physics Programme at JYFL). TG acknowledges the support ofthe Academy of Finland, contract number 131665. JP and SS acknowledgethe Academy of Finland (Finland) Grant No. 307685. M. Venhartacknowledges funding from the ESET Foundation (Slovakia). The authorswould like to express their gratitude to the technical staff of theAccelerator Laboratory at the University of Jyväskylä for their support.The authors would also like to wish thanks to Paul Morrall of DaresburyLaboratory for preparation of the Cd targets and to the GSI targetlaboratory for providing the C-reset foils, which are highly appreciated.
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026