Skip to Main content Skip to Navigation
Journal articles

New Type of Asymmetric Fission in Proton-Rich Nuclei

Abstract : A very exotic process of β-delayed fission of 180Tl is studied in detail by using resonant laser ionization with subsequent mass separation at ISOLDE (CERN). In contrast to common expectations, the fission-fragment mass distribution of the post-β-decay daughter nucleus 180Hg (N/Z=1.25) is asymmetric. This asymmetry is more surprising since a mass-symmetric split of this extremely neutron-deficient nucleus would lead to two 90Zr fragments, with magic N=50 and semimagic Z=40. This is a new type of asymmetric fission, not caused by large shell effects related to fragment magic proton and neutron numbers, as observed in the actinide region. The newly measured branching ratio for β-delayed fission of 180Tl is 3.6(7)×10-3%, approximately 2 orders of magnitude larger than in an earlier study.
Document type :
Journal articles
Complete list of metadata

http://hal.in2p3.fr/in2p3-00575165
Contributor : Sophie Heurteau <>
Submitted on : Wednesday, March 9, 2011 - 5:08:51 PM
Last modification on : Wednesday, September 16, 2020 - 4:08:31 PM

Links full text

Identifiers

Collections

Citation

A. N. Andreyev, J. Elseviers, M. Huyse, P. van Duppen, S. Antalic, et al.. New Type of Asymmetric Fission in Proton-Rich Nuclei. Physical Review Letters, American Physical Society, 2010, 105, pp.252502. ⟨10.1103/PhysRevLett.105.252502⟩. ⟨in2p3-00575165⟩

Share

Metrics

Record views

193