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Fission decay as a measure of statistical equilibration of coherent collective modes

  • III. Cohrent nuclear states and their decay properties
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Book cover Dynamics of Nuclear Fission and Related Collective Phenomena

Part of the book series: Lecture Notes in Physics ((LNP,volume 158))

Abstract

The decay of coherent collective modes into fission is discussed, focussing mainly on the decay of isobaric analog resonances (IAR) and isoscalar giant resonances in the actinide region. Results from (3He,tf) experiments on 232Th and 238U are presented from which it is deduced that the spreading widths Γ↓ of the IAR are 90±20 keV for 232Th and 142±37 keV for 238U compared to total widths of 306±20 keV and 380±40 keV for 232Th and 238U, respectively. For the isoscalar giant resonances (GR) around 11 MeV in 238U, it is concluded that they have fission probabilities less than the GDR, indicating more equilibration for the isovector GDR than for the isoscalar GR at ≈11 MeV.

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  1. Kernfysisch Versneller Instituut, Groningen, The Netherlands

    Muhsin N. Harakeh

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  1. Muhsin N. Harakeh
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Peter David Theo Mayer-Kuckuk Adriaan van der Woude

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© 1982 Springer-Verlag

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Harakeh, M.N. (1982). Fission decay as a measure of statistical equilibration of coherent collective modes. In: David, P., Mayer-Kuckuk, T., van der Woude, A. (eds) Dynamics of Nuclear Fission and Related Collective Phenomena. Lecture Notes in Physics, vol 158. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0021524

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  • DOI: https://doi.org/10.1007/BFb0021524

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