Measurement of the heaviest β-delayed 2-neutron emitter: 136Sb
1 TRIUMF, Vancouver BC, V6T 2A3, Canada
2 Universitat Politècnica de Catalunya, 08028 Barcelona, Spain
3 GSI Helmholtz Center for Heavy Ion Research, 64291 Darmstadt, Germany
4 IFIC, CSIC-Universitat de València, 46071 València, Spain
5 University of Helsinki, Helsinki, Finland
6 University of Jyvaskyla, Dept. of Physics, PO Box 35 YFL, 40014 University of Jyvaskyla, Finland
7 University of Istanbul, 34134 Vezneciler, Turkey
8 University of Surrey, Guildford GU2 7XH, UK
9 CIEMAT, 28040 Madrid, Spain
10 University of Brighton, BN2 4AT Brighton, UK
Published online: 13 September 2017
The β-delayed neutron emission probability, Pn, of very exotic nuclei is crucial for the understanding of nuclear structure properties of many isotopes and astrophysical processes such as the rapid neutron capture process (r-process). In addition β-delayed neutrons are important in a nuclear power reactor operated in a prompt sub-critical, delayed critical condition, as they contribute to the decay heat inducing fission reactions after a shut down. The study of neutron-rich isotopes and the measurement of β-delayed one-neutron emitters (β1n) is possible thanks to the Rare Isotope Beam (RIB) facilities, where radioactive beams allow the production of exotic nuclei of interest, which can be studied and analyzed using specific detection systems. This contribution reports two recent measurements of β-delayed neutron emitters which allowed the determination of half-lives and the neutron branching ratio of isotopes in the mass region above A = 200 and N > 126, and a second experiment which confirmed 136Sb as the heaviest double neutron emitter (β2n) measured so far.
© The Authors, published by EDP Sciences, 2017
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