Nuclear Seminar - Boris Andel (24.3.2021)
Wednesday 24.3.2021 at 14:00, online
Mgr. Boris Andel, PhD.:
Beta-delayed fission: studying low-energy fission via a rare decay mode
Abstract:
Beta-delayed fission (βDF) is a process, in which an excited state populated via β decay undergoes fission. The excitation energy is limited by Qβ value of parent nucleus, which is typically below 12 MeV. Thus, βDF belongs to so called low-energy fission, which is sensitive to structure of the nucleus. This phenomenon opens possibilities to study fission properties of exotic isotopes for which other approaches to low-energy fission research would be extremely difficult or currently impossible [1,2]. However, it is also a very rare decay mode, which was identified in less than 30 isotopes so far. In this seminar, βDF process and its importance will be introduced. Afterwards, recent experimental results obtained within our collaboration at ISOLDE facility (CERN) will be presented, with main focus on the most recent study of isotope 188Bi [3]. Future possibilities for further βDF investigations in the neutron-deficient isotopes near lead and plans to initiate experiments in the neutron-rich nuclei near francium will be discussed as well.
[1] A. N. Andreyev, K. Nishio and K.-H. Schmidt, Rep. Prog. Phys. 81, 016301 (2018).
[2] A. N. Andreyev, M. Huyse and P. Van Duppen, Rev. Mod. Phys. 85, 1541 (2013).
[3] B. Andel et al., Phys. Rev. C 102, 014319 (2020).