Predominant time scales in fission processes in reactions of S, Ti and Ni with W: Zeptosecond versus attosecond

R. Du Rietz*, D. J. Hinde, M. Dasgupta, R. G. Thomas, L. R. Gasques, M. Evers, N. Lobanov, A. Wakhle

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    98 Citations (Scopus)

    Abstract

    The inhibition of fusion by quasifission is crucial in limiting the formation of superheavy elements in collisions of heavy nuclei. Time scales of ∼10⊃-18s inferred for fissionlike events from recent crystal blocking measurements were interpreted to show either that quasifission itself is slower than previously believed, or that the fraction of slow fusion-fission is higher than expected. New measurements of mass-angle distributions for Ti48 and Ni64 bombarding W targets show that in these reactions quasifission is the dominant process, typically occurring before the system formed after contact has made a single rotation, corresponding to time scales of ≤10⊃-20s.

    Original languageEnglish
    Article number052701
    JournalPhysical Review Letters
    Volume106
    Issue number5
    DOIs
    Publication statusPublished - 1 Feb 2011

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