α-decay spectroscopy of the N = 130 isotones 218Ra and 220Th: Mitigation of α-particle energy summing with implanted nuclei
Parr, E., Smith, J. F., Greenlees, P. T., Auranen, K., Butler, P. A., Chapman, R., Cox, D. M., Cullen, D. M., Gaffney, L. P., Grahn, T., Gregor, E. T., Grocutt, L., Herzán, A., Herzberg, R.-D., Hodge, D., Jakobsson, U., Julin, R., Juutinen, S., Keatings, J., . . . Uusitalo, J. (2019). α-decay spectroscopy of the N = 130 isotones 218Ra and 220Th: Mitigation of α-particle energy summing with implanted nuclei. Physical Review C, 100(4), Article 044323. https://doi.org/10.1103/PhysRevC.100.044323
Published inPhysical Review C
Parr, E. |
DisciplineFysiikkaYdin- ja kiihdytinfysiikan huippuyksikköPhysicsCentre of Excellence in Nuclear and Accelerator Based Physics
© 2019 American Physical Society
An analysis technique has been developed in order to mitigate energy summing due to sequential short-lived α decays from nuclei implanted into a silicon detector. Using this technique, α-decay spectroscopy of the N=130 isotones 218Ra (Z=88) and 220Th (Z=90) has been performed. The energies of the α particles emitted in the 218Ra→214Rn and 220Th→216Ra ground-state-to-ground-state decays have been measured to be 8381(4) keV and 8818(13) keV, respectively. The half-lives of the ground states of 218Ra and 220Th have been measured to be 25.99(10) μs and 10.4(4) μs, respectively. The half-lives of the ground states of the α-decay daughters, 214Rn and 216Ra, have been measured to be 259(3) ns and 161(11) ns, respectively. Fine structure in the α decay of 218Ra has been observed for the first time, populating the 695-keV 2+1 state in 214Rn. The fine-structure α decay has an α-particle energy of 7715(40) keV and branching ratio bα=0.123(11)%.
PublisherAmerican Physical Society
Publication in research information system
MetadataShow full item record
Additional information about fundingThis work is supported in part by the STFC (UK) under Grants No. ST/J000183/2, No. ST/L005808/1, No. EP/E02551x1/1, and No. ST/L005794/1; by the EU 7th Framework Programme, Integrating Activities Transnational Access, Project No. 262010 (ENSAR); by the Academy of Finland under the Finnish Centre of Excellence Programme (Nuclear and Accelerator Based Physics Programme at JYFL); by the Slovak Research and Development Agency under Contract No. APVV-15-0225; by the Slovak grant agency VEGA (Contract No. 2/0129/17); and the project ITMS code 26210120023, supported by the Research and Development Operational Programme funded by ERDF (30%). The authors acknowledge support of Gammapool for use of the Jurogam detectors. E.P., J.F.S., and M.Sc. acknowledge support of the Scottish Universities Physics Alliance (SUPA). ...
Showing items with similar title or keywords.
Jakobsson, Ulrika (University of Jyväskylä, 2013)
A time-of-flight correction procedure for fast-timing data of recoils with varying implantation positions at a spectrometer focal plane Mallaburn, M.J.; Singh, B.S. Nara; Cullen, D. M.; Hodge, D.; Taylor, M.J.; Giles, M.M.; Barber, L.; Niţă, C.R.; Mihai, R.E.; Mihai, C.; Mărginean, R.; Mărginean, N.; Nobs, C.R.; Gamba, E.R.; Bruce, A.M.; Scholey, Catherine; Rahkila, Panu; Greenlees, Paul; Badran, Hussam; Grahn, Tuomas; Neuvonen, O.; Auranen, Kalle; Bisso, F.; Cox, Daniel; Herzan, Andrej; Julin, Rauno; Konki, Joonas; Lightfoot, A.K.; Pakarinen, Janne; Papadakis, P.; Partanen, Jari; Sandzelius, Mikael; Sarén, Jan; Sorri, Juha; Stolze, Sanna; Uusitalo, Juha; Regan, P.H.; Podolyák, Zs.; Lalkovski, S.; Smith, J.F.; Smolen, M. (Elsevier; North-Holland, 2019)Fast-timing measurements at the focal plane of a separator can suffer from poor timing resolution. This is due to the variations in time-of-flight (ToF) for photons travelling to a given detector, which arise from the ...
Konki, Joonas (University of Jyväskylä, 2017)The hitherto unknown neutron-deﬁcient nuclei 240Es and 236Bk were synthesised using the fusion-evaporation reaction 209Bi(34S,3n)240Es. The ritu gas-ﬁlled recoil separator and the great spectrometer were used in this ...
In-beam spectroscopic studies of shape coexistence and collectivity in the neutron-deficient Z ≈ 82 nuclei Julin, Rauno; Grahn, Tuomas; Pakarinen, Janne; Rahkila, Panu (Institute of Physics Publishing Ltd.; Institute of Physics, 2016)In the present paper we focus on studies of shape coexistence in even-mass nuclei in the neutron-deficient Pb region. They are based on experiments carried out using tagging techniques in the Accelerator Laboratory of the ...
Bootstrap technique to study correlation between neutron skin thickness and the slope of symmetry energy in atomic nuclei Muir, D.; Pastore, A.; Dobaczewski, Jacek; Barton, C.J. (Jagellonian University, 2018)We examine the proposed correlation between the neutron skin thickness and the slope of the symmetry energy for two doubly-magic nuclei ( 100Sn and 132Sn) and find that a statistically significant correlation appears to ...