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New type of asymmetric fission in proton-rich nuclei

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Abstract
Avery exotic process of beta-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 fissionfragment mass distribution of the post-beta-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 beta-delayed fission of 180Tl is 3.6(7) x 10^{-3}%, approximately 2 orders of magnitude larger than in an earlier study.

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Chicago
Andreyev, AN, J Elseviers, M Huyse, P Van Duppen, S Antalic, A Barzakh, N Bree, et al. 2010. “New Type of Asymmetric Fission in Proton-rich Nuclei.” Physical Review Letters 105.
APA
Andreyev, A., Elseviers, J., Huyse, M., Van Duppen, P., Antalic, S., Barzakh, A., Bree, N., et al. (2010). New type of asymmetric fission in proton-rich nuclei. PHYSICAL REVIEW LETTERS, 105.
Vancouver
1.
Andreyev A, Elseviers J, Huyse M, Van Duppen P, Antalic S, Barzakh A, et al. New type of asymmetric fission in proton-rich nuclei. PHYSICAL REVIEW LETTERS. 2010;105.
MLA
Andreyev, AN et al. “New Type of Asymmetric Fission in Proton-rich Nuclei.” PHYSICAL REVIEW LETTERS 105 (2010): n. pag. Print.
@article{1093783,
  abstract     = {Avery exotic process of beta-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 fissionfragment mass distribution of the post-beta-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 beta-delayed fission of 180Tl is 3.6(7) x 10\^{ }\{-3\}\%, approximately 2 orders of magnitude larger than in an earlier study.},
  articleno    = {252502},
  author       = {Andreyev, AN and Elseviers, J and Huyse, M and Van Duppen, P and Antalic, S and Barzakh, A and Bree, N and Cocolios, TE and Comas, VF and Diriken, J and Fedorov, D and Fedosseev, V and Franchoo, S and Heredia, JA and Ivanov, O and K{\"o}ster, U and Marsh, BA and Nishio, K and Page, RD and Patronis, N and Seliverstov, M and Tsekhanovich, I and Van den Bergh, P and Van De Walle, J and Venhart, M and Vermote, Sofie and Veselsky, M and Wagemans, Cyrillus and Ichikawa, T and Iwamoto, A and M{\"o}ller, P and Sierk, AJ},
  issn         = {0031-9007},
  journal      = {PHYSICAL REVIEW LETTERS},
  language     = {eng},
  pages        = {5},
  title        = {New type of asymmetric fission in proton-rich nuclei},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.105.252502},
  volume       = {105},
  year         = {2010},
}

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