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Towards saturation of the electron-capture delayed fission probability : The new isotopes 240Es and 236Bk

Abstract
The new neutron-deficient nuclei 240Es and 236Bk were synthesised at the gas-filled recoil separator RITU. They were identified by their radioactive decay chains starting from 240Es produced in the fusion–evaporation reaction 209Bi(34S,3n)240Es. Half-lives of 6(2) sand 22+13−6swere obtained for 240Es and 236Bk, respectively. Two groups of αparticles with energies Eα=8.19(3) MeVand 8.09(3) MeVwere unambiguously assigned to 240Es. Electron-capture delayed fission branches with probabilities of 0.16(6)and 0.04(2)were measured for 240Es and 236Bk, respectively. These new data show a continuation of the exponential increase of ECDF probabilities in more neutron-deficient isotopes.
Main Authors
Konki, Joonas Khuyagbaatar, J. Uusitalo, Juha Greenlees, Paul Auranen, Kalle Badran, Hussam Block, M. Briselet, R. Cox, D. M. Dasgupta, M. Nitto, A. Di Düllman, Ch. E. Grahn, Tuomas Hauschild, K. Herzan, Andrej Herzberg, R.-D. Heßberger, F. P. Hinde, D. J. Julin, Rauno Juutinen, Sakari Jäger, E. Kindler, B. Krier, J. Leino, Matti Lommel, B. Lopez-Martens, A. Luong, D. H. Mallaburn, M. Nishio, K. Pakarinen, Janne Papadakis, Philippos Partanen, Jari Peura, Pauli Rahkila, Panu Ruotsalainen, Panu Sandzelius, Mikael Sarén, Jan Scholey, Catherine Sorri, Juha Stolze, Sanna Sulignano, B. Theisen, Ch. Ward, A. Yakushev, A. Yakusheva, V.
Format
Articles Research article
Published
2017
Series
Physics Letters B
Subjects
mass
α decay
electron-capture delayed fission
fusion-evaporation reactions
isotoopit
Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/26335750
Publisher
Elsevier BV * North-Holland
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-201612024931Käytä tätä linkitykseen.
Review status
Peer reviewed
ISSN
0370-2693
DOI
https://doi.org/10.1016/j.physletb.2016.11.038
Language
English
Published in
Physics Letters B
Citation
  • Konki, J., Khuyagbaatar, J., Uusitalo, J., Greenlees, P., Auranen, K., Badran, H., Block, M., Briselet, R., Cox, D. M., Dasgupta, M., Nitto, A. D., Düllman, C. E., Grahn, T., Hauschild, K., Herzan, A., Herzberg, R.-D., Heßberger, F. P., Hinde, D. J., Julin, R., . . . Yakusheva, V. (2017). Towards saturation of the electron-capture delayed fission probability : The new isotopes 240Es and 236Bk. Physics Letters B, 764, 265-270. https://doi.org/10.1016/j.physletb.2016.11.038
License
Open Access
Copyright© 2016 the Authors. Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP3.

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